On Fri, Feb 8, 2019 at 2:37 PM Michael Niedermayer <michae...@gmx.at> wrote:
> ogg allows chaining streams when they have differing serial numbers > https://xiph.org/ogg/doc/oggstream.html > > i think ive seen actual files doing this > > ogg_replace_stream() might assign these into existing avstreams i think > If I'm reading this correctly, I think that should always happen at the boundary of a new ogg page, meaning it wouldn't rely on this multiple headers logic? I found the commit where this was introduced https://github.com/FFmpeg/FFmpeg/commit/81b743eb1026547270b88ac6a5cb451a3907ee94?diff=split With the description: This fixes some old ogm files that had the 3rd vorbis header after a data packet in another stream. This is invalid in ogg, but this change shouldn't affect the behaviour of any valid file. So, I don't think we're going to find spec text for this. No spec for OGM and committer indicates its not valid Ogg. I'm guessing we want to still support these ogm files? _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
