Capture audio input + output with pulseaudio

I just wanted to capture a hangouts talk with my friend and got back to an old problem - how to properly record a call so that both myself and my companion can be heard.

Solution is courtesy to this youtube video and for own use I made a script out of it.

	#!/bin/bash
	#
	# Usage:
	#
	# capture-audio.sh [ffmpeg args]
	#
	function get_default_sink_or_source() {
	SINK_OR_SOURCE=$1
	pacmd list-${SINK_OR_SOURCE}s |\
	grep -F -A1 \* |\
	tail -n1 |\
	sed -e 's/.*<\(.*\)>/\1/'
	}
	DEFAULT_INPUT="$(get_default_sink_or_source source)"
	DEFAULT_OUTPUT="$(get_default_sink_or_source sink).monitor"
	echo "Capturing from"
	echo "Microphone: ${DEFAULT_INPUT}"
	echo "Desktop audio: ${DEFAULT_OUTPUT}"
	echo
	if [ "$#" -gt 1 ]; then
	ARGS="$@"
	else
	ARGS="${HOME}/$(date +%F_%H%M%S).mp3"
	fi
	exec ffmpeg -f pulse -i ${DEFAULT_INPUT} \
	-f pulse -i ${DEFAULT_OUTPUT} \
	-filter_complex amix=inputs=2 \
	${ARGS}

view raw capture-audio.sh hosted with ❤ by GitHub