Hi, I'm hoping someone here can help me figure out how to setup my configuration properly. I'm trying to output sound through the echo-cancel module but by going through the alsa device. Unfortunately, the application doesn't support pulseaudio for the playback. configuration: raspberry pi 4ubuntu 20.04 ffmpeg : 4.2.2-1ubuntu1 pulseaudio : 13.99.1-1ubuntu3.2 In order to do that, i've defined the echo-cancel configuration in /etc/pulse/default.pa:load-module module-echo-cancel use_master_format=1 aec_method=webrtc aec_args="analog_gain_control=0\ digital_gain_control=1" source_name="echoCancel_source" sink_name="echoCancel_sink"
It works. I can test it with : ffmpeg -i recording.wav -f pulse -device echoCancel_sink test Now in order to playback through alsa, i've defined a pcm device: cat /etc/alsa/conf.d/90-echocancel.conf pcm.pulse-echo-cancel {
type pulse device "echoCancel_sink" } ctl.pulse-echo-cancel { type pulse sink "echoCancel_sink" } When I try this configuration with: ffmpeg -i recording.wav -f alsa pulse-echo-cancel Sound is scrambled and super slow. Does anyone know how to make this configuration work? Any pointer would be appreciated. I feel I got the correct overall approach but i am missing something about the rate convertion or specification. Best regards |
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