do not display par and dar if not available

[ffmpeg] / libavcodec / aac_ac3_parser.c

diff --git a/libavcodec/aac_ac3_parser.c b/libavcodec/aac_ac3_parser.c
index 46824fbbdabe26e6bde6f3686f8051e38dcb1d39..999a189158fd052c98de4ede89a0b49e24ac30f1 100644 (file)
--- a/libavcodec/aac_ac3_parser.c
+++ b/libavcodec/aac_ac3_parser.c
@@ -60,13 +60,15 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
                     s->frame_size = len;
                     /* update codec info */
                     avctx->sample_rate = sample_rate;
-                    avctx->channels = channels;
-                    /* allow downmixing to mono or stereo for AC3 */
+                    /* allow downmixing to stereo (or mono for AC3) */
                     if(avctx->request_channels > 0 &&
                             avctx->request_channels < channels &&
-                            avctx->request_channels <= 2 &&
-                            avctx->codec_id == CODEC_ID_AC3) {
+                            (avctx->request_channels <= 2 ||
+                            (avctx->request_channels == 1 &&
+                            avctx->codec_id == CODEC_ID_AC3))) {
                         avctx->channels = avctx->request_channels;
+                    } else {
+                        avctx->channels = channels;
                     }
                     avctx->bit_rate = bit_rate;
                     avctx->frame_size = samples;