ffmpeg: force 128k default audio bitrate if nothing is specified and there is no specific default

This prevents breaking existing command lines in case the "ab" default is removed from libavcodec

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 5 insertions, 0 deletions

diff --git a/ffmpeg.c b/ffmpeg.c
index ae02b00784..9f9170e327 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2604,6 +2604,11 @@ static int init_output_stream(OutputStream *ost, char *error, int error_len)
         if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
             av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
         av_dict_set(&ost->encoder_opts, "side_data_only_packets", "1", 0);
+        if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
+            !codec->defaults &&
+            !av_dict_get(ost->encoder_opts, "b", NULL, 0) &&
+            !av_dict_get(ost->encoder_opts, "ab", NULL, 0))
+            av_dict_set(&ost->encoder_opts, "b", "128000", 0);
 
         if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
             if (ret == AVERROR_EXPERIMENTAL)