On Sat, Mar 27, 2021 at 09:13:10AM +0100, Bo Berglund wrote: > On Sat, 27 Mar 2021 02:50:13 +0100, Peter White <peter.wh...@posteo.net> > wrote: > > >> I tested your command ona typical video file and found that the output > >> looks > >> basically like this: > >> > >> [FRAME] > >> best_effort_timestamp_time=3900.000000 > >> [/FRAME] > >> [FRAME] > >> best_effort_timestamp_time=3905.000000 > >> [/FRAME] > >> [FRAME] > >> best_effort_timestamp_time=3910.000000 > >> [/FRAME] > >> [FRAME] > >> best_effort_timestamp_time=3915.000000 > >> [/FRAME] > >> > >> It seems like there are "frames" at every 5 seconds. > > > >Not to be picky, but there are certainly very many more frames. The > >distinction is between *keyframes* and everything else called a frame. > > > Of course this is not the entire output! It streams past at high speed so > covers > many many pages.
That I did understand. I just wanted to be extra clear that there most certainly are many more *non-key* frames between those keyframes listed above, usually motion pictures have at least 24 frames per second. > But it all looks the same with the time incrementing at exactly 5 seconds... Looks like someone took extra care to have a static keyframe interval. One can do that. With default codec options x264 won't produce such output though. Cheers, Peter _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
