General

General dump of snippets for random shit

FFmpeg merge system and microphone audio track into a single one

Useful for screen recordings of video games.

ffmpeg -filter_complex amix=inputs=2 -c:v copy -c:a aac outputvid.mp4 -i inputvid.mp4

Same as above but reduciing file size

ffmpeg -filter_complex "amix=inputs=2" -c:v libx264 -crf 28 -preset ultrafast -c:a aac -b:a 128k outputvid.mp4.mp4 -i inputvid.mp4