X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fmpegts.c;h=f61388b5c1d6b4aa764c06ee504619a84090be53;hb=1cf0f27985965c28049b7a8481c859867dad3948;hp=f7f484e133fdc08ec6d37a213650035d59fede0a;hpb=c266d0e1bd56272939feb4eeee91b927a27c0953;p=ffmpeg

diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index f7f484e133f..f61388b5c1d 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -1515,6 +1515,10 @@ static const uint8_t opus_coupled_stream_cnt[9] = {
     1, 0, 1, 1, 2, 2, 2, 3, 3
 };
 
+static const uint8_t opus_stream_cnt[9] = {
+    1, 1, 1, 2, 2, 3, 4, 4, 5,
+};
+
 static const uint8_t opus_channel_map[8][8] = {
     { 0 },
     { 0,1 },
@@ -1760,11 +1764,8 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
                     return AVERROR_INVALIDDATA;
                 if (channel_config_code <= 0x8) {
                     st->codec->extradata[9]  = channels = channel_config_code ? channel_config_code : 2;
-                    st->codec->extradata[18] = channels > 2;
-                    st->codec->extradata[19] = channels - opus_coupled_stream_cnt[channel_config_code];
-                    if (channel_config_code == 0) { /* Dual Mono */
-                        st->codec->extradata[18] = 255; /* Mapping */
-                    }
+                    st->codec->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
+                    st->codec->extradata[19] = opus_stream_cnt[channel_config_code];
                     st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
                     memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels);
                 } else {