resize an .mkv file
I wanted to play a 720p .mkv file on an old laptop but it was painfully slow. How to reduce the quality of an .mkv file?
I found the solution here. The following worked for me:
$ ffmpeg -i Movie.mkv -vf scale=-1:360 -c:v libx264 -crf 18 -preset veryslow -c:a copy MyMovie_360p.mkv
Visit the link above for an explanation of the parameters.