exactly same result as 'cook-start', i.e. /usr/bin/env ffmpeg -y -ss 0:03:18 -t 0:00:10 -i cook.mp4 -c copy cook-start.mp4 &> cook-start.txt; # ss input option
> On 10 Oct 2018, at 19:30, DopeLabs <[email protected]> wrote: > > try this one... > > > /usr/bin/env ffmpeg -y -ss 0:03:18 -i cook.mp4 -t 0:00:10 -c copy > cook-start.mp4 &> cook-start.txt > > > >> On Oct 10, 2018, at 8:44 56AM, Samat Galimov <[email protected] >> <mailto:[email protected]>> wrote: >> >> Hello, >> >> tl;dr: Q: is there a way to cut a 10 second clip from a h264 video >> (downloaded from youtube) to later use it in web browsers with no quality >> loss? >> >> What I have tried so far: http://alpha.rawg.io/question/ >> >> Long version: >> >> My inputs are http://alpha.rawg.io/question/cook.txt >> <http://alpha.rawg.io/question/cook.txt><http://alpha.rawg.io/question/cook.txt >> <http://alpha.rawg.io/question/cook.txt>> >> >> My first attempt is to opt-in for copy codecs using the following command: >> >> /usr/bin/env ffmpeg -y -ss 0:03:18 -t 0:00:10 -i cook.mp4 -c copy >> cook-start.mp4 &> cook-start.txt >> >> What I've got is: >> - Safari: audio/video sync is OK, beginning is OK, but additional 3 seconds >> of audio without video in the end >> - Chrome: audio/video is out of sync >> >> Then I tried to specify -ss as an output option: >> >> /usr/bin/env ffmpeg -y -i cook.mp4 -ss 0:03:18 -t 0:00:10 -c copy >> cook-end.mp4 &> cook-end.txt >> >> Safari & Chrome: first 3 seconds have no video, but audio only. >> >> >> Is there a clever trick to overcome this apparent keyframe location issue >> while not re-encoding videos? >> >> If there is no way to avoid re-encoding, what options should I use to >> minimise quality loss? >> >> Here is the webpage to check out my results & source files: >> https://alpha.rawg.io/question/ >> <https://alpha.rawg.io/question/><https://alpha.rawg.io/question/ >> <https://alpha.rawg.io/question/>> >> >> Thank you very much in advance. >> >> Samat. >> _______________________________________________ >> ffmpeg-user mailing list >> [email protected] <mailto:[email protected]> >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >> <http://ffmpeg.org/mailman/listinfo/ffmpeg-user> >> >> To unsubscribe, visit link above, or email >> [email protected] <mailto:[email protected]> with >> subject "unsubscribe". > > _______________________________________________ > ffmpeg-user mailing list > [email protected] <mailto:[email protected]> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > <http://ffmpeg.org/mailman/listinfo/ffmpeg-user> > > To unsubscribe, visit link above, or email > [email protected] <mailto:[email protected]> with > subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
