Greetings ffmpeg folks, I have been using ffmpeg to encode DVDs to webm files (vp9). Things look really good in general, however it seems that when the scene is not changing much, such as a person talking and the camera doesn't move off of them, then the walls in the scene will get encoded with very big blotchy squares.
Here are my encoding commands: ffmpeg -i INPUT.vob -vf yadif -pass 1 -passlogfile first-pass-log-file -b:v 2M -auto-alt-ref 1 -quality best -minrate 100K -maxrate 16M -lag-in-frames 16 -keyint_min 0 -g 360 -skip_threshold 0 -qmin 0 -qmax 60 -vcodec libvpx-vp9 -f webm -- - &> /dev/null ffmpeg -i INPUT.vob -vf yadif -pass 2 -passlogfile first-pass-log-file -b:v 2M -auto-alt-ref 1 -quality best -minrate 100K -maxrate 16M -lag-in-frames 16 -keyint_min 0 -g 360 -skip_threshold 0 -qmin 0 -qmax 60 -vcodec libvpx-vp9 -acodec libvorbis -aq 3 OUTPUT.webm Any suggestions on things to change to get rid of those blotchy areas? I was thinking of maybe upping the minrate. I know I can try experimenting with the encoding parameters, but I was hoping for a little direction in what to perhaps perturb. Thanks for any help! -m _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
