On Sat, Jan 08, 2022 at 08:20:46PM +0000, MacFH - C E Macfarlane - News wrote: > On 08/01/2022 19:38, Simon van Bernem via ffmpeg-user wrote: > > > > ffmpeg -i input.mkv > > -vf "select='1-between(t,20,25)-between(t,100,200) > > -between(t,220,300)-between(t,400,600)-between(t,750,800) > > -between(t,820,860)-between(t,880,900)-between(t,1000,1200) > > -gt(t,1500)'" > > -af "aselect='1-between(t,20,25)-between(t,100,200) > > -between(t,220,300)-between(t,400,600)-between(t,750,800) > > -between(t,820,860)-between(t,880,900)-between(t,1000,1200) > > -gt(t,1500)'" output3.mkv > > > > Is there a way to cut up a video into multiple parts using the select > > filter without having the video and audio go out of sync or having > > glitchy video playback? If not, what is the best alternative? > > To select parts of a video, I use ... > > FFMPEG -ss <start-time> -i <input> -codec copy -to <end> <output> > > ... however it's tedious, because with this method the video will only break > at certain points between compression units (can't remember the proper > terminology), and it can take some experimentation to find the precise > timing of these to get the audio right as well, and often, because of the > way the compression works, the first extracted frame is often an unwanted > last frame of a previous scene. > > I have long lamented that FFMPEG doesn't make this both easier and to allow > greater resolution, if necessary recreating the start and end compression > units to get the exact timing wanted.
If you get rid of the "-codec copy" you can have any precision you'd like. Tom _______________________________________________ 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".
