Add Audio to a Video file in Linux with FFMPEG

Add Audio to a Video file in Linux with FFMPEG:

$ ffmpeg -i input.mp4 -i input.mp3 -vcodec copy -acodec libmp3lame output.flv

*NOTES:
- Where input is the source file and output the outcome file.
- The $ sign at the start of the command is to signify the terminal's prompt, no need to type this in.
- Many file formats are supported, for more see $ man ffmpeg