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[82.58.28.189]) by smtp.gmail.com with ESMTPSA id rs6-20020a170907036600b00a4e6626ae21sm7084275ejb.0.2024.04.16.10.48.34 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Apr 2024 10:48:34 -0700 (PDT) Received: by mariano (Postfix, from userid 1000) id 9178DBFCE8; Tue, 16 Apr 2024 19:48:33 +0200 (CEST) Date: Tue, 16 Apr 2024 19:48:33 +0200 From: Stefano Sabatini To: FFmpeg development discussions and patches Message-ID: Mail-Followup-To: FFmpeg development discussions and patches References: <20240416082949.63344-1-stefasab@gmail.com> <20240416082949.63344-5-stefasab@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.1.4 (2021-12-11) Subject: Re: [FFmpeg-devel] [PATCH 4/6] doc/muxers: add mkvtimestamp_v2 X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: 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. Also, IIRC there is no generic way to reorder PTSs, so this might account for another difference which might be difficult to implement generically. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".