GBA video conversion for ffmpeg + Meteo

Instead of having to use an online converter

ffmpeg -i "input.ext" -c:v msmpeg4v2 -c:a adpcm_ms -g 15 -tune animation -crf 23 -b:a 96k -s 854x480 output.avi

After this just use Meteo from here:

https://github.com/Sterophonick/mirror-meteo-avi2gba