FFmpeg is a command line tool for video and audio conversion. It can also capture from a live audio or video source. It is cross-platform, available for Linux, Mac OS X, windows and more
Install ffmpeg in Ubuntu by entering these commands in the terminal (Ctrl +Alt + T):
sudo apt update
sudo apt install ffmpeg
Command usage examples:
Convert a video to other format
Convert mp4 to avi format
ffmpeg -i input.mp4 output.avi
similarly convert flv to mpeg
ffmpeg -i input.flv output.mpeg
convert mov to mp4
ffmpeg -i input.mov -vcodec h264 -acodec aac -strict -2 output.mp4
Convert Video to Audio
ffmpeg -i input.mp4 -vn -ab 320 output.mp3
here 320 is the bitrate, you may change it.
Compress a video file
ffmpeg -i input.mp4 -b 1000000 output.mp4
here 1000000 is the bitrate, you may specify yours
Compress an audio file
ffmpeg -i input.mp3 -ab 128 output.mp3
here 128 is the bitrate, you may specify yours