Videos with H.264 video and AAC sound im MP4 containers seem to strike a very good size performance balance. So I modified a copy of vid2mkv to use ffmpeg to create this kind of files instead.

To speed up the processing of multiple files, this script runs the conversions in parallel on all the cores that your machine has.

The vid2mp4.py script can be downloaded from github.

:Requirements * python (version 3) * ffmpeg