---
libavformat/gsmdec.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/libavformat/gsmdec.c b/libavformat/gsmdec.c
index f0cb279..f9ecbaf 100644
--- a/libavformat/gsmdec.c
+++ b/libavformat/gsmdec.c
@@ -19,6 +19,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/channel_layout.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "avformat.h"
@@ -64,6 +65,7 @@ static int gsm_read_header(AVFormatContext *s)
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = s->iformat->raw_codec_id;
st->codec->channels = 1;
+ st->codec->channel_layout = AV_CH_LAYOUT_MONO;
st->codec->sample_rate = c->sample_rate;
st->codec->bit_rate = GSM_BLOCK_SIZE * 8 * c->sample_rate /
GSM_BLOCK_SAMPLES;
--
1.7.1
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