On 02/09/2016 04:29 PM, Moritz Barsnick wrote: > On Tue, Feb 09, 2016 at 14:56:47 +0300, ValdikSS wrote: > That's what I have been wondering all along in this thread. Who is > doing it wrong? > > What I could observe (I think) from using the file: > Its DTS/PTS seem to be correct. They are about 41..42 ms apart in the > first section (corresponds to 23.98 fps), about 33..34 ms apart in the > second section (corresponds to 29.97 fps). The pkt_duration, as > mentioned by Valdik originally, also seems to be correct for each > section. > > Matroska supports VFR, so this shouldn't be a general problem (should > it?). Does it support a CFR header, and did mkvmerge insert this? Just > wondering. > > $ ffmpeg -i rkszxnz.mkv -threads 3 -speed 5 rkszxnz.webm > > Now, what ffmpeg seems to be doing is to be converting to CFR 23.98 > (when converting to webm with libvpx-vp9). Obvious from the warnings > and the dropped frames starting from the "cut" point around 55 s, and > from the pkt_duration in the resulting file. > > Is this intended? What's the point of *not* retaining the DTS/PTS and > the frame rate when converting without explicit "-r" or the likes? > > Anyway, I do not see this effect mentioned by Valdik:
That's weird. I'll try make a screen capture or find another video or moment where it's more visible a bit later. > Not even after 55 seconds. (Using my conversion.) OTOH, I can't seek in > the resulting video, which is wildly annoying. Use something like -g 120 > > Valdik, I must apologize at this point, none of us has yet pointed out > that you should supply the complete, uncut console log of your ffmpeg > calls (along with the proper command line of course). Because: > You seem to be using a version from around July 20 2015. Have you tried > latest git master yet? I will try it a bit later, thanks. > > Moritz > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
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