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Of course I don't know what I'm doing, what fun would that be?

How to switch your pitch on linux

Nick Gully, Denver

Say you want to sound like you are huffing Helium.

Recoding with Cheese, save a file (on Fedora 37, this becomes a .webm)

Cut the audio out of the video:
ffmpeg -i 2023-02-13-203611.webm  -vn -acodec copy "output.oga"

Shift the pitch up:
ffmpeg -i output.oga -filter:a "rubberband=pitch=2.059463094352953" 

Then add the audio to a 
ffmpeg -loop 1 -y -i balloon.png -i out_balloon2.wav -shortest -acodec 
copy -vcodec mjpeg the_ballon_knows.avi

The Balloon Knows Where It Is...