Convert any Video to work on Classic Macs using the xvid/divx plugin

You need to have FFMPEG installed, so find brew on the web, install it, and install FFMPEG.

This requires the use of the Terminal.

The following example command will convert all mp4 files in the current directory and subdirectories recursively to XVID/DIVX at 720p that will work on any classic that has the XVID/DIVX plugin installed.
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find . -name "*.mp4" -exec ffmpeg -i {} -vf scale=-1:720 -c:v mpeg4 -vtag xvid -qscale:v 3 -c:a libmp3lame -qscale:a 4 {}.avi \;