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dedicated_pulse_out.sh

Dedicated pulse output for an application

What

This script does a few things:

  • Starts the specified application
  • Creates a pulse audio output sink with a specified name
    • Assigns the default output of your system to that sink
  • Waits for the application to connect to pulseaudio (in other words to try to make any noise)
    • Assigns the application's output to the created sink
    • Repeats that in every second during the life of the application

And, lastly...

  • Waits for CTRL-C
    • And kills the application
  • Waits for the app to quit
    • And removes the sink and quit

Why

Because this way you can start an application and insert an "Audio Output Capture" source in OBS, that is receiving ONLY the output of that application.

Pretty neat, uh?

How

Start it without arguments, and it will tell you how:

./dedicated_pulse_out.sh 
USAGE:
        dedicated_pulse.sh <sink_name> <command>

Example:
        dedicated_pulse.sh songs 'vlc playlist.xspf'

If you follow that example, then you will be able to add an Audio Output Capture source that is pointing to the "window-songs" named output sink from pulse audio.

Known bugs

  • According to the source-comment mentioned link, the combined sink should play the applications output on the main output too. For me it does not work:)
    • Solution: You can enable monitoring (right click->properties) in OBS, and you will hear it.