Stefano Sabatini: > On date Tuesday 2024-04-16 12:50:19 +0200, Andreas Rheinhardt wrote: >> Stefano Sabatini: >>> --- >>> doc/muxers.texi | 8 ++++++++ >>> 1 file changed, 8 insertions(+) >>> >>> diff --git a/doc/muxers.texi b/doc/muxers.texi >>> index f94513527d..490d5557bf 100644 >>> --- a/doc/muxers.texi >>> +++ b/doc/muxers.texi >>> @@ -2933,6 +2933,14 @@ MicroDVD subtitle format muxer. >>> >>> This muxer accepts a single @samp{microdvd} subtitles stream. >>> >>> +@section mkvtimestamp_v2 >>> +mkvtoolnix v2 timecode format muxer. >>> + >>> +Write the PTS rawvideo frame to the output, as supported by the >>> +@command{mkvextact} tool from the @command{mkvtoolnix} suite. >>> + >>> +This muxer accepts a single @samp{rawvideo} stream. >>> + >>> @section mp3 >>> >>> The MP3 muxer writes a raw MP3 stream with the following optional features: >> > >> This is wrong: MKVToolNix switched to "# timestamp format v2" a long >> time ago (we still write the old "# timecode format v2" header); >> furthermore, MKVToolNix actually uses pts (which it reorders to be >> ascending), not dts like our muxer. Furthermore MKVToolNix does not >> force a 1ms precision on timestamps. > > Correct. > > I compared the output of the muxer and of mkvtoolnix extract > timestamp_v2 and I'm not yet clear about the timestamp differences I'm > observing (the muxer output maps with the timestamps, the mkvtoolnix > timestamps differ by a few ms). But I think also mkvtoolnix use a 1ms > timebase.
The accuracy of the timestamps output by mkvextract is determined by the TimestampScale of the file in question; it is most often 1ms when the file has video. You need to provide more details if you want these discrepancies to be analyzed. > > Also, IIRC there is no generic way to reorder PTSs, so this might > account for another difference which might be difficult to implement > generically. Write them into a buffer and reorder them at the end? (No, I have no intention to actually implement this. I am rather leaning to "this muxer should not exist".) - Andreas _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".