[FFmpeg-trac] #2785(avformat:new): Matroska muxer produces non spec conformant files when adding chapters

FFmpeg trac at avcodec.org
Mon Jul 15 19:59:17 CEST 2013


#2785: Matroska muxer produces non spec conformant files when adding chapters
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             Reporter:  jamal       |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  mkv         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by jamal):

 Looking at http://matroska.org/technical/specs/tagging/example-video.html
 it would seem that at least one SimpleTag for things like "title" or such
 are needed.
 Currently, mkv_write_simpletag() in matroskaenc.c
 [http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/matroskaenc.c;h=7efda5ab6bbda78153947d39dfcef55d6fb7c8bf;hb=HEAD#l868
 is called for everything except "title" and "stereo_mode"].

 By letting it call mkv_write_simpletag() for "title" tags when they are
 for chapters, the file validates.
 It also validates if i let it call mkv_write_simpletag() for any "title"
 tag whatsoever, be it for chapter or not. So no idea why the line i linked
 above is filtering them.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2785#comment:4>
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