TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   11214kB time=00:09:45.79 bitrate= 156.8kbits/s speed= 117x
video:2059kB audio:9153kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.008857%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56173472e8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000088.MIT6_042JS15_probcond_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.2.1 Conditional Probability Definitions: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:12:18.16, start: 0.000000, bitrate: 239 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 92 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:28:01.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x561734b6e480] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x561734731c40] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000088.MIT6_042JS15_probcond_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.2.1 Conditional Probability Definitions: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   13595kB time=00:12:18.16 bitrate= 150.9kbits/s speed= 119x
video:2059kB audio:11534kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007464%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55ed4fe2d8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000089.MIT6_042JS15_probtotal_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.2.3 Law of Total Probability: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:03:32.39, start: 0.000000, bitrate: 268 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 94 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:28:07.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55ed4ff9f220] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55ed4fe75380] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000089.MIT6_042JS15_probtotal_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.2.3 Law of Total Probability: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.5 q=-0.0 Lsize=    5380kB time=00:03:32.40 bitrate= 207.5kbits/s speed= 115x
video:2059kB audio:3319kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.018665%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55a2ccc878c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000090.MIT6_042JS15_probbayes_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.2.5 Bayes' Theorem: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:11:38.54, start: 0.000000, bitrate: 284 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 852x640 [SAR 1916:1917 DAR 479:360], 132 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 851x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:28:00.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55a2cd0bf800] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55a2cceae320] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000090.MIT6_042JS15_probbayes_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.2.5 Bayes' Theorem: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   12973kB time=00:11:38.38 bitrate= 152.2kbits/s speed= 106x
video:2059kB audio:10913kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007664%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55b93322c8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000091.MIT6_042JS15_probcondmonty_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.2.7 Monty Hall Problem: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:08:41.31, start: 0.000000, bitrate: 320 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 852x640 [SAR 1916:1917 DAR 479:360], 165 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 851x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:28:02.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55b9334779e0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55b9332bb200] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000091.MIT6_042JS15_probcondmonty_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.2.7 Monty Hall Problem: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   10206kB time=00:08:41.32 bitrate= 160.4kbits/s speed= 108x
video:2059kB audio:8146kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.009780%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55d59ce088c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000092.MIT6_042JS15_probindep_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.3.1 Independence: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:03:35.74, start: 0.000000, bitrate: 357 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 21843:21845 DAR 1014778:760559], 184 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:28:03.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55d59cf7f2c0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55d59ce54520] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000092.MIT6_042JS15_probindep_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.3.1 Independence: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.5 q=-0.0 Lsize=    5432kB time=00:03:35.74 bitrate= 206.2kbits/s speed= 105x
video:2059kB audio:3371kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.018270%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55a8da37f8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000093.MIT6_042JS15_probmutual_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.3.3 Mutual Independence: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:08:18.81, start: 0.000000, bitrate: 291 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 852x640 [SAR 1916:1917 DAR 479:360], 135 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 851x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:28:06.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55a8da5cae40] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55a8da41c900] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000093.MIT6_042JS15_probmutual_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.3.3 Mutual Independence: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=    9855kB time=00:08:18.83 bitrate= 161.8kbits/s speed= 106x
video:2059kB audio:7795kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.010138%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5613390708c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000094.MIT6_042JS15_ranvarbigger_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.4.1 Bigger Number Game: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:12:18.93, start: 0.000000, bitrate: 250 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 852x640 [SAR 1916:1917 DAR 479:360], 97 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 851x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:31:48.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x5613394b08e0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x56133929a440] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000094.MIT6_042JS15_ranvarbigger_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.4.1 Bigger Number Game: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   13607kB time=00:12:18.95 bitrate= 150.8kbits/s speed= 118x
video:2059kB audio:11547kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007335%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x562dbaa128c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000095.MIT6_042JS15_ranvarindep_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.4.2 Random Variables: Independence: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:15:30.61, start: 0.000000, bitrate: 259 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 109 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:31:50.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x562dbaf31d00] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x562dbaa7a700] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000095.MIT6_042JS15_ranvarindep_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.4.2 Random Variables: Independence: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.1 q=-0.0 Lsize=   16602kB time=00:15:30.61 bitrate= 146.1kbits/s speed= 117x
video:2059kB audio:14541kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.006083%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5599556de8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000096.MIT6_042JS15_ranvarbinom_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.4.4 Random Variables: Uniform & Binomial: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:11:33.05, start: 0.000000, bitrate: 267 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 65438:65535 DAR 165115:123923], 115 kb/s, SAR 14167:14188 DAR 1012580:759967, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 852x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:31:49.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55995588da60] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x559955905860] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000096.MIT6_042JS15_ranvarbinom_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.4.4 Random Variables: Uniform & Binomial: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   12880kB time=00:11:32.45 bitrate= 152.4kbits/s speed= 117x
video:2059kB audio:10820kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007886%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5634fa6388c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000097.MIT6_042JS15_expectintro_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.5.1 Expectation: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:18:53.43, start: 0.000000, bitrate: 248 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 65438:65535 DAR 165115:123923], 99 kb/s, SAR 14167:14188 DAR 1012580:759967, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 852x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:22:09.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x5634fa8edee0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x5634fa78ad20] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000097.MIT6_042JS15_expectintro_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.5.1 Expectation: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.1 q=-0.0 Lsize=   19764kB time=00:18:52.98 bitrate= 142.9kbits/s speed= 118x
video:2059kB audio:17703kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005016%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x564ffaf178c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000098.MIT6_042JS15_expectheads_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.5.3 Expected Number Of Heads: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:04:38.97, start: 0.000000, bitrate: 288 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 21843:21845 DAR 1014778:760559], 121 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:22:07.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x564ffaf81b60] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x564ffafaec80] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000098.MIT6_042JS15_expectheads_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.5.3 Expected Number Of Heads: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.4 q=-0.0 Lsize=    6420kB time=00:04:38.98 bitrate= 188.5kbits/s speed= 117x
video:2059kB audio:4360kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.015640%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55e9d7f138c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000099.MIT6_042JS15_expecttotal_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.5.5 Total Expectation: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:04:17.58, start: 0.000000, bitrate: 268 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 21843:21845 DAR 1014778:760559], 99 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:22:10.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55e9d8092020] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55e9d7fa9340] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000099.MIT6_042JS15_expecttotal_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.5.5 Total Expectation: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.5 q=-0.0 Lsize=    6086kB time=00:04:17.59 bitrate= 193.5kbits/s speed= 116x
video:2059kB audio:4025kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.016387%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55b5948458c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000100.MIT6_042JS15_expectfail_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.5.7 Mean Time to Failure: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:11:24.66, start: 0.000000, bitrate: 256 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 21843:21845 DAR 1014778:760559], 105 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:22:07.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55b594c7a560] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55b594c9ac60] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000100.MIT6_042JS15_expectfail_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.5.7 Mean Time to Failure: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   12759kB time=00:11:24.67 bitrate= 152.7kbits/s speed= 119x
video:2059kB audio:10698kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007838%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55f2742698c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000101.MIT6_042JS15_expectlinear_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.5.9 Linearity of Expectation: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:18:29.36, start: 0.000000, bitrate: 237 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 21843:21845 DAR 1014778:760559], 91 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:22:10.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55f2747577a0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55f2744761a0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000101.MIT6_042JS15_expectlinear_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.5.9 Linearity of Expectation: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.1 q=-0.0 Lsize=   19395kB time=00:18:29.36 bitrate= 143.2kbits/s speed= 119x
video:2059kB audio:17334kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005176%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55fcf0a328c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000102.MIT6_042JS15_deviation_intro_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.6.1 Deviation From The Mean: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:07:46.07, start: 0.000000, bitrate: 238 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 81 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:21:59.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55fcf0a91f00] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55fcf0a84240] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000102.MIT6_042JS15_deviation_intro_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.6.1 Deviation From The Mean: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.3 q=-0.0 Lsize=    9343kB time=00:07:46.07 bitrate= 164.2kbits/s speed= 119x
video:2059kB audio:7283kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.010735%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x556f2df9f8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000103.MIT6_042JS15_deviationmarkov_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.6.3 Markov Bounds: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:08:47.14, start: 0.000000, bitrate: 250 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 94 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:22:01.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x556f2e2ffd80] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x556f2e17ec60] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000103.MIT6_042JS15_deviationmarkov_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.6.3 Markov Bounds: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   10297kB time=00:08:47.15 bitrate= 160.0kbits/s speed= 117x
video:2059kB audio:8237kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.009646%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56345685d8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000104.MIT6_042JS15_deviationchebyshev_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.6.5 Chebyshev Bounds: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:10:21.92, start: 0.000000, bitrate: 298 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 145 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:22:00.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x563456bc21c0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x5634569c4200] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000104.MIT6_042JS15_deviationchebyshev_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.6.5 Chebyshev Bounds: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   11778kB time=00:10:21.92 bitrate= 155.1kbits/s speed= 108x
video:2059kB audio:9718kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.008458%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5610a17db8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000105.MIT6_042JS15_deviationvariance_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.6.7 Variance: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:14:34.81, start: 0.000000, bitrate: 234 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 85 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 132 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:22:02.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x5610a1cf2d20] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x5610a17e00e0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000105.MIT6_042JS15_deviationvariance_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.6.7 Variance: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.1 q=-0.0 Lsize=   15730kB time=00:14:34.81 bitrate= 147.3kbits/s speed= 118x
video:2059kB audio:13669kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.006283%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5641f84be8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000106.MIT6_042JS15_largenumbers_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.7.1 Law Of Large Numbers: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:13:48.74, start: 0.000000, bitrate: 248 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 97 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:24:22.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x5641f867b2a0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x5641f86ee9a0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000106.MIT6_042JS15_largenumbers_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.7.1 Law Of Large Numbers: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.1 q=-0.0 Lsize=   15010kB time=00:13:48.76 bitrate= 148.4kbits/s speed= 119x
video:2059kB audio:12950kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.006663%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55b984c328c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000107.MIT6_042JS15_pairwisesample_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.7.3 Independent Sampling Theorem: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:06:51.67, start: 0.000000, bitrate: 252 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 92 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:27:52.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55b984c8c400] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55b984cb83e0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000107.MIT6_042JS15_pairwisesample_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.7.3 Independent Sampling Theorem: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.3 q=-0.0 Lsize=    8493kB time=00:06:51.69 bitrate= 169.0kbits/s speed= 118x
video:2059kB audio:6433kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.011867%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x556bc6d3f8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000108.MIT6_042JS15_birthday_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.7.5 Birthday Matching: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:12:18.60, start: 0.000000, bitrate: 232 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 852x640 [SAR 21845:21841 DAR 930597:698912], 79 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 852x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:13:31.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x556bc7183c20] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x556bc6f7b260] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000108.MIT6_042JS15_birthday_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.7.5 Birthday Matching: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   13602kB time=00:12:18.61 bitrate= 150.9kbits/s speed= 117x
video:2059kB audio:11541kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007331%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x561e3c26a8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000109.MIT6_042JS15_confidence_video_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.7.7 Sampling & Confidence: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:12:56.01, start: 0.000000, bitrate: 252 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 852x640 [SAR 21845:21841 DAR 930597:698912], 102 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 133 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 852x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:13:38.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x561e3c6ad520] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x561e3c4967c0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000109.MIT6_042JS15_confidence_video_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.7.7 Sampling & Confidence: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   14186kB time=00:12:56.02 bitrate= 149.8kbits/s speed= 118x
video:2059kB audio:12126kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007057%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5595f13dc8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000110.MIT6_042JS15_random_walks_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.8.1 Random Walks: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:10:34.48, start: 0.000000, bitrate: 228 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 856x640 [SAR 962:963 DAR 481:360], 75 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 855x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:31:47.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x5595f173eba0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x5595f1534200] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000110.MIT6_042JS15_random_walks_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.8.1 Random Walks: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   11967kB time=00:10:33.99 bitrate= 154.6kbits/s speed= 116x
video:2059kB audio:9907kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.008292%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55d25d8af8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000111.MIT6_042JS15_stable_distribution_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.8.2 Stationary Distributions: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:16:01.09, start: 0.000000, bitrate: 233 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 854x640 [SAR 1280:1281 DAR 4:3], 82 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 135 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:32:10.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:3 -> #0:0 (mjpeg (native) -> png (native))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[swscaler @ 0x55d25db919e0] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x55d25daea440] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000111.MIT6_042JS15_stable_distribution_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.8.2 Stationary Distributions: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
    Stream #0:0: Video: png, rgb24(progressive), 1400x1400 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
    Metadata:
      encoder         : Lavc57.107.100 png
    Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.1 q=-0.0 Lsize=   17063kB time=00:16:00.15 bitrate= 145.6kbits/s speed= 117x
video:2059kB audio:15003kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005884%
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
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[mov,mp4,m4a,3gp,3g2,mj2 @ 0x56251d5fd8c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '000112.MIT6_042JS15_pagerank_ipod.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    title           : 4.8.3 Page Rank: Video
    artist          : Albert R. Meyer
    album_artist    : MIT OpenCourseWare
    album           : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    genre           : MIT Faculty Lectures
    date            : 2013-06-12T04:00:00Z
    copyright       : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    encoder         : Lavf55.18.100
    media_type      : 9
    rating          : 0
  Duration: 00:10:58.26, start: 0.000000, bitrate: 261 kb/s
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    Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874), 853x96, 0 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2016-01-21T20:27:51.000000Z
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1400x1400 [SAR 72:72 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
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Press [q] to stop, [?] for help
[swscaler @ 0x56251d962b00] deprecated pixel format used, make sure you did set range correctly
[mp3 @ 0x56251d767400] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, mp3, to '000112.MIT6_042JS15_pagerank_ipod.mp4.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    episode_id      : 000
    TIT2            : 4.8.3 Page Rank: Video
    TPE1            : Albert R. Meyer
    TPE2            : MIT OpenCourseWare
    TALB            : MIT OCW: 6.042J Mathematics for Computer Science, Spring 2015
    comment         : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    TCON            : MIT Faculty Lectures
    TDRC            : 2013-06-12T04:00:00Z
    TCOP            : http://ocw.mit.edu; Creative Commons Attribution-NonCommercial-ShareAlike 4.0; http://ocw.mit.edu/terms; Album art photo by robert.molinarius on Flickr.
    rating          : 0
    media_type      : 9
    TSSE            : Lavf57.83.100
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    Metadata:
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      encoder         : Lavc57.107.100 libmp3lame
frame=    1 fps=0.2 q=-0.0 Lsize=   12342kB time=00:10:58.02 bitrate= 153.7kbits/s speed= 107x
video:2059kB audio:10282kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.008016%
tallpik3@ganymede:~/public_html/22S/580/mp4/6042jS15/mp4$
tallpik3@ganymede:~/public_html/22S/580/mp4/6042jS15/mp4$ mkdir ../mp3
tallpik3@ganymede:~/public_html/22S/580/mp4/6042jS15/mp4$ mv *.mp3 ../mp3/
tallpik3@ganymede:~/public_html/22S/580/mp4/6042jS15/mp4$ ls
000001.MIT6_042JS15_welcome_6042S15_ipod.mp4      000039.MIT6_042JS15_diehardprimes_ipod.mp4             000077.MIT6_042JS15_bijectioncount_video_ipod.mp4
000002.MIT6_042JS15_proof1_ipod.mp4               000040.MIT6_042JS15_unique_factorization_ipod.mp4      000078.MIT6_042JS15_genprod_video_ipod.mp4
000003.MIT6_042JS15_proof2_ipod.mp4               000041.MIT6_042JS15_congruence_ipod.mp4                000079.MIT6_042JS15_count2pair_video_ipod.mp4
000004.MIT6_042JS15_contradiction_ipod.mp4        000042.MIT6_042JS15_inversesmodn_ipod.mp4              000080.MIT6_042JS15_binomialtheorem_ipod.mp4
000005.MIT6_042JS15_cases_ipod.mp4                000043.MIT6_042JS15_phi_ipod.mp4                       000081.MIT6_042JS15_bookkeeper_ipod.mp4
000006.MIT6_042JS15_wellordering1_ipod.mp4        000044.MIT6_042JS15_zmodn_ipod.mp4                     000082.MIT6_042JS15_pigeonhole_video_ipod.mp4
000007.MIT6_042JS15_wellordering2_ipod.mp4        000045.MIT6_042JS15_rsa_ipod.mp4                       000083.MIT6_042JS15_incexc6042_video_ipod.mp4
000008.MIT6_042JS15_wellordering3b_ipod.mp4       000046.MIT6_042JS15_sat_factors_video_ipod.mp4         000084.MIT6_042JS15_incexc2set_video_ipod.mp4
000009.MIT6_042JS15_props_and_ops_ipod.mp4        000047.MIT6_042JS15_digraphs_ipod.mp4                  000085.MIT6_042JS15_probintro_video_ipod.mp4
000010.MIT6_042JS15_digital_logic_ipod.mp4        000048.MIT6_042JS15_connected_ipod.mp4                 000086.MIT6_042JS15_simplemonty_video_ipod.mp4
000011.MIT6_042JS15_truth_tables_ipod.mp4         000049.MIT6_042JS15_dags_video_ipod.mp4                000087.MIT6_042JS15_probspace_video_ipod.mp4
000012.MIT6_042JS15_predicatelogic1_ipod.mp4      000050.MIT6_042JS15_scheduling_ipod.mp4                000088.MIT6_042JS15_probcond_video_ipod.mp4
000013.MIT6_042JS15_predicatelogic2_ipod.mp4      000051.MIT6_042JS15_paralleltime_ipod.mp4              000089.MIT6_042JS15_probtotal_video_ipod.mp4
000014.MIT6_042JS15_predicatelogic3_ipod.mp4      000052.MIT6_042JS15_partialorderpt_ipod.mp4            000090.MIT6_042JS15_probbayes_video_ipod.mp4
000015.MIT6_042JS15_sets_def_ipod.mp4             000053.MIT6_042JS15_reppo_ipod.mp4                     000091.MIT6_042JS15_probcondmonty_video_ipod.mp4
000016.MIT6_042JS15_set_ops_ipod.mp4              000054.MIT6_042JS15_equivalence_ipod.mp4               000092.MIT6_042JS15_probindep_video_ipod.mp4
000017.MIT6_042JS15_relations_ipod.mp4            000055.MIT6_042JS15_simpledegrees_video_ipod.mp4       000093.MIT6_042JS15_probmutual_video_ipod.mp4
000018.MIT6_042JS15_mapping_lemma_ipod.mp4        000056.MIT6_042JS15_simple_isomorphism_video_ipod.mp4  000094.MIT6_042JS15_ranvarbigger_video_ipod.mp4
000019.MIT6_042JS15_finitecardinality_ipod.mp4    000057.MIT6_042JS15_simplecoloring_video_ipod.mp4      000095.MIT6_042JS15_ranvarindep_video_ipod.mp4
000020.MIT6_042JS15_induction_ipod.mp4            000058.MIT6_042JS15_simpleconnect_video_ipod.mp4       000096.MIT6_042JS15_ranvarbinom_video_ipod.mp4
000021.MIT6_042JS15_bogusinduction_ipod.mp4       000059.MIT6_042JS15_simple_kconnect_ipod.mp4           000097.MIT6_042JS15_expectintro_video_ipod.mp4
000022.MIT6_042JS15_stronginduction_ipod.mp4      000060.MIT6_042JS15_treedefs_video_ipod.mp4            000098.MIT6_042JS15_expectheads_video_ipod.mp4
000023.MIT6_042JS15_WOPvsInduction_ipod.mp4       000061.MIT6_042JS15_treecoloring_video_ipod.mp4        000099.MIT6_042JS15_expecttotal_video_ipod.mp4
000024.MIT6_042JS15_statemachines_ipod.mp4        000062.MIT6_042JS15_spanningtrees_video_ipod.mp4       000100.MIT6_042JS15_expectfail_video_ipod.mp4
000025.MIT6_042JS15_derivedvariables_ipod.mp4     000063.MIT6_042JS15_stablematch_video2_ipod.mp4        000101.MIT6_042JS15_expectlinear_video_ipod.mp4
000026.MIT6_042JS15_recursivedata_ipod.mp4        000064.MIT6_042JS15_stableritual_video_ipod.mp4        000102.MIT6_042JS15_deviation_intro_ipod.mp4
000027.MIT6_042JS15_structuralinduction_ipod.mp4  000065.MIT6_042JS15_stableoptimal_ipod.mp4             000103.MIT6_042JS15_deviationmarkov_video_ipod.mp4
000028.MIT6_042JS15_recursivefunctions_ipod.mp4   000066.MIT6_042JS15_bipartitematch_video_ipod.mp4      000104.MIT6_042JS15_deviationchebyshev_video_ipod.mp4
000029.MIT6_042JS15_cardinality_ipod.mp4          000067.MIT6_042JS15_halltheorem_ipod.mp4               000105.MIT6_042JS15_deviationvariance_video_ipod.mp4
000030.MIT6_042JS15_countable_ipod.mp4            000068.MIT6_042JS15_arithmeticsum_video_ipod.mp4       000106.MIT6_042JS15_largenumbers_video_ipod.mp4
000031.MIT6_042JS15_cantor_ipod.mp4               000069.MIT6_042JS15_geometricsum_video_ipod.mp4        000107.MIT6_042JS15_pairwisesample_video_ipod.mp4
000032.MIT6_042JS15_haltingproblem_s13_ipod.mp4   000070.MIT6_042JS15_bookstack_video_ipod.mp4           000108.MIT6_042JS15_birthday_video_ipod.mp4
000033.MIT6_042JS15_Russell_paradox_ipod.mp4      000071.MIT6_042JS15_integralsum_video_ipod.mp4         000109.MIT6_042JS15_confidence_video_ipod.mp4
000034.MIT6_042JS15_ZF_ipod.mp4                   000072.MIT6_042JS15_stirling_video_ipod.mp4            000110.MIT6_042JS15_random_walks_ipod.mp4
000035.MIT6_042JS15_gcd_def_ipod.mp4              000073.MIT6_042JS15_asymptoticnotation_ipod.mp4        000111.MIT6_042JS15_stable_distribution_ipod.mp4
000036.MIT6_042JS15_gcd_def_ipod.mp4              000074.MIT6_042JS15_asymptoticproperties_ipod.mp4      000112.MIT6_042JS15_pagerank_ipod.mp4
000037.MIT6_042JS15_gcd_euclid_ipod.mp4           000075.MIT6_042JS15_asymptoticblunders_video_ipod.mp4  get_mp4.sh
000038.MIT6_042JS15_pulverizer_ipod.mp4           000076.MIT6_042JS15_rulescount_video_ipod.mp4
tallpik3@ganymede:~/public_html/22S/580/mp4/6042jS15/mp4$