bmv: set channel layout

libavformat/bmv.c

@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/channel_layout.h"
 #include "avformat.h"
 #include "internal.h"
 
@@ -58,6 +59,7 @@ static int bmv_read_header(AVFormatContext *s)
     ast->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
     ast->codec->codec_id        = AV_CODEC_ID_BMV_AUDIO;
     ast->codec->channels        = 2;
+    ast->codec->channel_layout  = AV_CH_LAYOUT_STEREO;
     ast->codec->sample_rate     = 22050;
     avpriv_set_pts_info(ast, 16, 1, 22050);