I made a timelapse out of an image sequence using ffmpeg and the copy
codec to disable compression and keep the quality to a max. The timelapse is a bit too long (10 minutes and up) so I tried to use this command to speed it up
ffmpeg -i timelapse.avi -filter:v "setpts=0.3*PTS" timelapse_fast.avi
Unfortunately, the quality became that of an online video in 1995. I then tried this
ffmpeg -i timelapse.avi -filter:v "setpts=0.3*PTS" -vcodec copy timelapse_fast.avi
It worked but disabled the setpts filter, so the video was not sped up
I also tried the following
ffmpeg -i timelapse.avi -filter:v "setpts=0.3*PTS" -crf 1 timelapse_fast.avi
To no avail
Any idea? thanks
-q 1
seemed to have done it but there is still a little bit of compression visibleffmpeg
console output from at least one of your commands.