diff options
| -rw-r--r-- | libavcodec/aac_ac3_parser.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavcodec/aac_ac3_parser.c b/libavcodec/aac_ac3_parser.c index c5d7c8a5ca..46824fbbda 100644 --- a/libavcodec/aac_ac3_parser.c +++ b/libavcodec/aac_ac3_parser.c @@ -61,6 +61,13 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1, /* update codec info */ avctx->sample_rate = sample_rate; avctx->channels = channels; + /* allow downmixing to mono or stereo for AC3 */ + if(avctx->request_channels > 0 && + avctx->request_channels < channels && + avctx->request_channels <= 2 && + avctx->codec_id == CODEC_ID_AC3) { + avctx->channels = avctx->request_channels; + } avctx->bit_rate = bit_rate; avctx->frame_size = samples; } |