Hi, I will probably get flamed because I'm for jumping into this conversation while being a complete newbie :-), but I think nobody replied with an answer to Mark's question "why".
All I know is the ffmpeg page on seeking - https://trac.ffmpeg.org/wiki/Seeking - ends with a paragraph saying: "Using -ss as input/output option *together with -c:v copy might not be accurate* since ffmpeg is forced to only use/split on i-frames" (emphasis mine) The page also states that: "As of FFmpeg 2.1, when transcoding with ffmpeg (*i.e. not stream copying*), -ss is now also "frame-accurate" even when used as an input option" My understanding is thus that with input seeking, the requested start time will not be satisfied without transcoding; while with output seeking, the requested start time will always be guaranteed correct, even with -c copy. But I might be wrong ;-) Peace. Vincent On Sun, Feb 11, 2024 at 8:29 PM Paul B Mahol <one...@gmail.com> wrote: > On Sun, Feb 11, 2024 at 7:12 PM Mark Filipak <markfilipak.i...@gmail.com> > wrote: > > > On 11/02/2024 13.09, Bouke / Videotoolshed wrote: > > > So do you, so why ask the question? > > > Now go away! > > > > I do not know the answer. > > > > In most cases you will get in most times different results for those 2 > variants. > > Only for perfect containers and perfect implementations it will give same > result in every case. > For last one I do not have any example ffmpeg command to show you. (And I'm > not sure if it even exist) > > > > > > _______________________________________________ > > 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". > > > _______________________________________________ > 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". > _______________________________________________ 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".
