scripts/scripts/cmds/find-stereo.fish

#!/usr/bin/env fish

set filter 'pan=mono|c0=0.5*FL+-0.5*FR,silenceremove=start_periods=1:detection=peak'

for f in $argv
	set out (ffmpeg -nostdin -loglevel error -i "$f" -filter_complex "$filter" -t 0.00002 -f crc -)

	if test "$out" != 'CRC=0x00000001'
		set other /tmp/(basename "$f")
		echo "$f is stereo, converting"
		ffmpeg -i "$f" -ac 1 "$other" && mv "$other" "$f"
	else
		echo "$f is mono"
	end
end

## EOF