Howto mix line pulseaudio
pulseaudio
list audio sources:
pactl list sources short
output:
53 alsa_output.pci-0000_04_00.0.hdmi-stereo.monitor PipeWire s32le 2ch 48000Hz RUNNING 54 alsa_input.usb-R__DE_Wireless_GO_II_RX_215C1214-01.analog-stereo PipeWire s24le 2ch 48000Hz RUNNING 65 alsa_input.usb-ezcap_ezcap_LIVE_GAMER_RAW_00000001-02.iec958-stereo PipeWire s16le 2ch 48000Hz RUNNING
we want to sink audio from hdmi-stereo.monitor and ezcap:
pactl load-module module-null-sink sink_name=both sink_properties=device.description=ezcap-and-speakers pactl load-module module-loopback source=alsa_output.pci-0000_04_00.0.hdmi-stereo.monitor sink=both pactl load-module module-loopback source=alsa_input.usb-ezcap_ezcap_LIVE_GAMER_RAW_00000001-02.iec958-stereo sink=both pactl load-module module-loopback sink=both
list sink inputs:
pactl list sink-inputs short
output:
72 65 - PipeWire float32le 2ch 48000Hz 86 65 - PipeWire float32le 2ch 48000Hz 100 65 - PipeWire float32le 2ch 48000Hz
change the output source from 65 to 53:
pactl move-sink-input 100 53
create bash script to automate this process:
cat > ~/bin/ezcap-audio-sink << EOF
#!/bin/bash
sleep 3
pactl load-module module-null-sink sink_name=both sink_properties=device.description=ezcap-and-speakers
pactl load-module module-loopback source=alsa_output.pci-0000_04_00.0.hdmi-stereo.monitor sink=both
pactl load-module module-loopback source=alsa_input.usb-ezcap_ezcap_LIVE_GAMER_RAW_00000001-02.iec958-stereo sink=both
pactl load-module module-loopback sink=both
sink=$(pactl list sink-inputs short|tail -n 1|awk '{print $1}')
output=$(pactl list sources short|grep hdmi-stereo.monitor|awk '{print $1}')
pactl move-sink-input ${sink} ${output}
EOF
create systemd service as user to execute script when system boot:
cat > /home/linux/.config/systemd/user/ezcap-audio.service << EOF [Unit] Description=Ezcap audio sink service After=sound.target [Service] Type=forking ExecStart=/home/linux/bin/ezcap-audio-sink [Install] WantedBy=default.target EOF
enable and start systemd service as user:
systemctl --user enable ezcap-audio.service systemctl --user start ezcap-audio.service