[FFmpeg-devel] BUG in use of extradata and extradata_size with dvb subtitles and teletext

Andriy Lysnevych andriy.lysnevych at gmail.com
Sat Jan 25 16:59:16 CET 2014


Can you please review and share your thoughts about next DVB subtitles
functionality patch. It does few thing:

1) Adds support of multiple languages in one DVB subtitles stream in
the same way as it is for DVB teletext. Unfortunately this is only in
theory because I have no such stream to test.
2) Unlike current implementation that always sets subtitling type to
0x10 (in muxer) this implementation copies subtitling type from input
stream. In current implementation hearing impaired stream become
normal after copying that is not fully correct.
3) Correctly sets subtitling type (0x20) for hearing impaired
subtitles if no subtitling type in extradata.

This patch changes AVStream.extradata format of DVB subtitle streams
in MPEG-TS muxer and demuxer.

Andriy Lysnevych
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