How to stream sound from your Linux/pipewire computer to your mobile phone

The computer is assumed to run pipewire for its sound system.

First, install icecast on a server somewhere, e.g. icecast.example.com, port 8000

Secondly, install VLC on your phone.

Then, install gstreamer and its plugins on the computer, e.g:

sudo apt install gstreamer1.0-plugins-good

Figure out the number of the sound device that you want to stream:

pw-cat -r --list-targets

Let's say it's 50. On my computer that is the number for the monitor source, which will be unaffacted by the volume levels of the computer.

Then issue this command line:

gst-launch-1.0 pipewiresrc path=50 ! \
audioconvert ! vorbisenc ! oggmux ! \
shout2send mount=/stream.ogg port=8000 username=source \
password=hackme ip=icecast.example.com

There may be extraneous stages in the pipeline above. But it works.

Update 2023-07-30

However for me, there was still one small problem: The volume was too low after coming out from icecast. However there is a pipeline stage you can put in with the plugin audioamplify which solved that problem.

So now the pipeline in Gstreamer looks like this:

gst-launch-1.0 pipewiresrc path=50 ! \
audioconvert ! audioamplify amplification=4 ! \
vorbisenc ! oggmux ! \
shout2send mount=/stream.ogg port=8000 username=source \
password=hackme ip=icecast.example.com

There is also a Gstreamer volume plugin, but it can only attenuate.