[FFmpeg-trac] #1924(avformat:new): ASS subtitles are demuxed inconsistently

[FFmpeg]

#1924: ASS subtitles are demuxed inconsistently
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             Reporter:  gjdfgh       |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  normal       |                Component:  avformat
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by gjdfgh):

 OK, found out that libass provides a separate function ass_process_data(),
 which can takes "complete" ASS events as libavformat outputs them. While
 it's a bit annoying that you can't get the length of the subtitle event in
 the AVPacket duration/convergence_duration fields, these are not really
 needed when using libass (or if you need them, use the libavcodec ass
 decoder).

 You actually can't get the Matroska ReadOrder field, which is used yb
 libass for something. I don't know if this is a bug or a caveat, or if
 it's actually handled in some way.

 Can't close this myself as invalid. Sorry for the noise.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1924#comment:2>
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