Question / Help Help, how to cut img only to apear the music/track?

[hell77]

Hello im new :P i wanted to cut the firefox/ or the winap to apear in the screen only the track/music.
any helps

 

[Jack0r]

You can crop any source while a preview/stream/recording is running and you activate the "edit mode":
http://jp9000.github.io/OBS/general/editmode.html

To crop a side or corner of the source just hold the ALT key and drag it where you want.