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]> 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> > > 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/> > > Thank you very much in advance. > > Samat. > _______________________________________________ > 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". _______________________________________________ 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".
