On Fri, 16 Jun 2017 13:51:20 +0200 21na...@gmail.com wrote: > Le 16/06/2017 à 12:55, wm4 a écrit : > > On Fri, 16 Jun 2017 02:32:10 +0200 > > 21na...@gmail.com wrote: > > > >> Hello, > >> > >> > >> I would like to know why the tag “DURATION” in Matroska files (.mkv) is > >> a necessity? Even mkvmerge lets the choice to use it or not with > >> “--enable-durations”, in addition it is written “Write durations for all > >> blocks. This will increase file size and does not offer any additional > >> value for players at the moment.” (source > >> https://mkvtoolnix.download/doc/mkvmerge.html#d4e535). > >> > >> Possibly linked to > >> http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=31852540d4fba0c4e8a16d0b3ddff08fc98e48fd > >> > > As far as I'm aware, the linked commit does not do the same thing as > > the mkvmerge option you pointed out. > > Yes that is why I wrote “possibly”, also because this commit is the one > which adds the tag “DURATION” as a necessity, but a necessity that no > software seems to use and it is not even a standard in the Matroska’s > documentation if I am not mistaken. So the fact that it is a necessity > and not a choice is the main problem.
Who says it's a necessity or standard? It's just what mkvmerge does. Since the patch is by google, I assume google has some use for it (there might also be a discussion about it on the ML). _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel