diff --git a/cmd/ffmpeg/ffmpeg.go b/cmd/ffmpeg/ffmpeg.go
index 2a853883..947d55a2 100644
--- a/cmd/ffmpeg/ffmpeg.go
+++ b/cmd/ffmpeg/ffmpeg.go
@@ -67,6 +67,7 @@ var defaults = map[string]string{
 	"pcma/48000": "-c:a pcm_alaw -ar:a 48000 -ac:a 1",
 	"aac":        "-c:a aac", // keep sample rate and channels
 	"aac/16000":  "-c:a aac -ar:a 16000 -ac:a 1",
+	"mp3":        "-c:a libmp3lame -q:a 8",
 
 	// hardware Intel and AMD on Linux
 	// better not to set `-async_depth:v 1` like for QSV, because framedrops