Useful ffmpeg commands

[Abhi]

To increase the volume of a file by 2.0

`ffmpeg -i input.wav -filter:a "volume=2.0" output.wav`

[Source](https://trac.ffmpeg.org/wiki/AudioVolume)

 

[admin]

`-map 0`

after input file name if you have more than one sound track in the video.

 

[Abhi]

`ffmpeg -i input.wav -map 0 -filter:a "volume=2.0" output.wav`

Like this?

 

[admin]

Yes, that should work.

There is a huge set of commands in their wiki. Also there is a wide community support when it comes to ffmpeg.