From 6c2f883f9e16a3b4b678f360e56959adc11a12c4 Mon Sep 17 00:00:00 2001 From: Alexey Khit Date: Tue, 4 Jul 2023 10:37:40 +0300 Subject: [PATCH] Fix OPUS transcoding quality --- internal/ffmpeg/ffmpeg.go | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/internal/ffmpeg/ffmpeg.go b/internal/ffmpeg/ffmpeg.go index b46f5212..555487bb 100644 --- a/internal/ffmpeg/ffmpeg.go +++ b/internal/ffmpeg/ffmpeg.go @@ -62,7 +62,9 @@ var defaults = map[string]string{ //"mjpeg": "-c:v mjpeg -force_duplicated_matrix:v 1 -huffman:v 0 -pix_fmt:v yuvj420p", // https://ffmpeg.org/ffmpeg-codecs.html#libopus-1 - "opus": "-c:a libopus -ar:a 48000 -ac:a 2 -application:a voip -compression_level:a 0", + // https://github.com/pion/webrtc/issues/1514 + // `-af adelay=0|0` - force frame_size=960, important for WebRTC audio quality + "opus": "-c:a libopus -ar:a 48000 -ac:a 2 -application:a voip -af adelay=0|0", "pcmu": "-c:a pcm_mulaw -ar:a 8000 -ac:a 1", "pcmu/16000": "-c:a pcm_mulaw -ar:a 16000 -ac:a 1", "pcmu/48000": "-c:a pcm_mulaw -ar:a 48000 -ac:a 1",