PulseAudio

PulseAudio is the built-in audio system in ubuntu. As a result of the quick tutorial, you are able to combine and fork audio stream on your computer.

You may want to plug your headset first.

# Outputs
pacmd list-sinks

# Inputs
pacmd list-sources

We create the „recording“ bubble from above.

pacmd load-module module-null-sink sink_name=recording sink_properties=device.description=recording

A loopback device for connecting inputs to recording. The latency is important to avoid delays.

pacmd load-module module-loopback latency_msec=1 sink=recording sink_dont_move=true

The combining bubble. To figure the name of your headset, call the list-commands mentioned above. My headset is from Logitech.

pacmd load-module module-combine-sink sink_name=combined sink_properties=device.description=combined slaves=recording,alsa_output.usb-Logitech_Logitech_USB_Headset_000000000000-00.analog-stereo

You are all set. Install PulseAudio Volume Control. This is additionally needed to ubuntu’s sound settings.

sudo apt install pavucontrol

Lavf… is ffmpeg capturing my screen, adding a logo to it, and recording the related audio stream. All at once. Also, my voice, and the voices of all attendees of a video call get recorded, while not hearing myself during the online session.

In ubuntu’s sound settings, my headset listens to the headset’s default „Headphones – 960“. You probably want to check that.

All recordings are done? Unload all modules.

pacmd list-modules
pacmd unload-module <number of the module>

Learn more about screen recording with ffmpeg.

Learn more about video editing: Video Bearbeitung mit Linux und Blender, Videos bearbeiten mit Linux.