---
 libavformat/flvdec.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index 868cc6b..7d5ea56 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -25,6 +25,7 @@
  */
 
 #include "libavutil/avstring.h"
+#include "libavutil/channel_layout.h"
 #include "libavutil/dict.h"
 #include "libavutil/opt.h"
 #include "libavutil/intfloat.h"
@@ -749,6 +750,8 @@ static int flv_read_packet(AVFormatContext *s, AVPacket 
*pkt)
         bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
         if(!st->codec->channels || !st->codec->sample_rate || 
!st->codec->bits_per_coded_sample) {
             st->codec->channels              = channels;
+            st->codec->channel_layout        = channels == 1 ? 
AV_CH_LAYOUT_MONO :
+                                                               
AV_CH_LAYOUT_STEREO;
             st->codec->sample_rate           = sample_rate;
             st->codec->bits_per_coded_sample = bits_per_coded_sample;
         }
@@ -794,6 +797,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket 
*pkt)
                 avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
                                              st->codec->extradata_size * 8, 1);
                 st->codec->channels = cfg.channels;
+                st->codec->channel_layout = 0;
                 if (cfg.ext_sample_rate)
                     st->codec->sample_rate = cfg.ext_sample_rate;
                 else
-- 
1.7.1

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