On Thu, Mar 18, 2021, 17:01 Gyan Doshi <ffm...@gyani.pro> wrote: > > > On 2021-03-18 20:12, Jan Ekström wrote: > > So right now we do have an option in ffmpeg.c called itsoffset. It > > lets you configure the input offset in time (seconds - such as > > "1337.123" or time format - such as "00:00:01.123"). The only problem > > with it right now is that unless you set -copyts it will not get > > applied for anything else than subtitles, as the offset gets applied > > before and is not taken into account in the "start from PTS 0" > > calculation for video/audio streams. > > Not the case. > > ffmpeg -f lavfi -itsoffset 3 -i nullsrc=r=1:d=3 -vf showinfo -f null - > > gives > > [Parsed_showinfo_0 @ 0000019cc1b88540] n: 0 pts: 3 pts_time:3 ... > [Parsed_showinfo_0 @ 0000019cc1b88540] n: 1 pts: 4 pts_time:4 ... > [Parsed_showinfo_0 @ 0000019cc1b88540] n: 2 pts: 5 pts_time:5 ... > > I've used it many times to adjust sync among streams. > > Regards, > Gyan >
Very interesting! I will have to retest, I just recall that the last time I tried it got applied when there were multiple streams in an input when the start_time based adjustment was done. Jan > _______________________________________________ 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".
