convert wav to mp3 ffmpeg -i inputfile.wav -ab 320k outputfile.mp3 convert mov to mp4 (compress to reduce file size) ffmpeg -i input.mov -c:v libx264 -crf 23 -preset medium -c:a aac -b:a 128k output.mp4 sum left channel to stereo (if recorded only left channel) ffmpeg -af "pan=stereo|c0=c0|c1=c0"