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porjo/pulseaudio_rtp.md

Last active March 28, 2024 21:01
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Use Pulseaudio to stream audio file to network via RTP
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pulseaudio_rtp.md

RTP Server

Setup

pacmd load-module module-null-sink sink_name=rtp format=s16le channels=1 rate=16000
pacmd load-module module-rtp-send source=rtp.monitor

This sets up a multicast socket for RTP streams. When I tested this was 224.0.0.56:46136

Play + Listen to Audio

Pipe Audio File to RTP sink:

sox -e signed-integer -b 16 -r 16000 -c 1 <input filename> -t pulseaudio rtp

Receive Audio From RTP sink monitor:

parec -d rtp.monitor --rate=16000 --channels=1 | aplay -t raw -f S16_LE -r 16000

(for some reason using sox for playback I was getting glitchy audio with buffer underruns)

Diagnostics

Stop pulseaudio running

systemctl --user stop pulseaudio.socket
systemctl --user stop pulseaudio.service

Start in forground with debug output:

pulseaudio -vvvvv

RTP Client

TODO

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