Vorbis Comment Chapter Extension (for Opus, Vorbis, Flac, etc.)

[auphonic]

More and more people (especially in the german speaking podcasting scene) use the new chapter extension for opus, ogg vorbis, flac etc., see: ​http://wiki.xiph.org/Chapter_Extension

This enables chapter marks for all fileformats, which use the vorbis comments metadata system (opus, ogg vorbis, flac, speex, etc.).

It would be really cool, if ffmpeg could support this new standard - as it is already possible to show chapters in MP4/M4A files. This is especially interesting for podcaster, audiobooks, lecture recordings, etc. and with the new opus format!

Furthermore it should be quite easy to implement. If you need any further information or some example files, let me know and I will provide them!

[Carl Eugen Hoyos]

Please add (a link to) a sample file and please add complete, uncut output of "ffmpeg -i sample".

[auphonic]

Vorbis Chapter Extension Example

[auphonic]

Sorry, I forgot an example file - it is attached.
It is a 20sec file with 4 chapters.

Here is the output of ffmpeg -i vorbis_chapter_extension_demo.ogg:

holzi@holzi-dell:~/Desktop$ ffmpeg -i vorbis_chapter_extension_demo.ogg 
ffmpeg version N-44622-g16e52c8 Copyright (c) 2000-2012 the FFmpeg developers
  built on Sep 20 2012 12:42:58 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-ffplay --disable-ffserver --disable-avdevice --enable-bzlib --enable-libopencore-amrnb --enable-libfreetype --enable-libopencore-amrwb --enable-libfaac --enable-libgsm --enable-libmp3lame --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libopus
  libavutil      51. 73.101 / 51. 73.101
  libavcodec     54. 56.100 / 54. 56.100
  libavformat    54. 27.101 / 54. 27.101
  libavfilter     3. 16.104 /  3. 16.104
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, ogg, from 'vorbis_chapter_extension_demo.ogg':
  Duration: 00:00:19.84, start: 0.000000, bitrate: 43 kb/s
    Stream #0:0: Audio: vorbis, 44100 Hz, mono, s16, 40 kb/s
    Metadata:
      TITLE           : vorbis chapter extension demo
      DATE            : 2012
      ENCODED_BY      : auphonic.com
      ENCODED-BY      : auphonic.com
      CHAPTER001      : 00:00:00.000
      CHAPTER001NAME  : start
      CHAPTER002      : 00:00:05.000
      CHAPTER002NAME  : Five Seconds
      CHAPTER003      : 00:00:10.500
      CHAPTER003NAME  : Ten point 5 seconds
      CHAPTER004      : 00:00:15.000
      CHAPTER004NAME  : 15 sec - over soon
At least one output file must be specified

(I did not set an output file here)

[Carl Eugen Hoyos]

Fixed by James Almer in 04b9836.

Thank you for the report and the sample!