Incompatible with ffmpeg 5.0

[smeyfroi]

I tried to replace the ffmpeg libraries in here with an ARM64 build for M1 Mac from the latest sources, but it looks like the changes in ffmpeg v5 (see https://ffmpeg.org/index.html#news) break the approach taken by this plugin.

The ffmpeg changes seem quite far-ranging, so fixing this addon might need a chunk of work, unfortunately.