ffmpeg video processing

remove audio from video

ffmpeg -i example.mkv -c copy -an example-nosound.mkv

Specify bitrate

ffmpeg -i input.mp4 -b:v 1M -b:a 192k output.avi

Rotate video

ffmpeg -i in.mov -vf "transpose=1" out.mov

0 = 90CounterCLockwise and Vertical Flip (default)
1 = 90Clockwise
2 = 90CounterClockwise
3 = 90Clockwise and Vertical Flip