Fixing avatar/QRCode with recent mpv/ffmpeg
ffmpeg introduced a bug in scale2ref filter, then deprecated it in favor of another one called scale, thus making a breaking change for Karaoke Mugen.
See ticket here : https://trac.ffmpeg.org/ticket/10795
This is now resolved but we need to change the lavfi-complex code.
I bugged nah about it on Mastodon and he helped me fix the issue.
Thing is, we'll need to make sure linux/macos/windows builds are working as expected before releasing this into next.