2. video to crop sequence and sound

ffmpeg -i "in.mp4" -threads 8 -vf: "crop=1920:1080:100:24" -r 30 -f image2 out/out%05d.png

ffmpeg -i "in.mp4" -threads 8 -vn -ar 44100 -ac 2 -ab 384k -f mp3 out.mp3