sol: set channel layout

libavformat/sol.c

@@ -23,6 +23,7 @@
  * Based on documents from Game Audio Player and own research
  */
 
+#include "libavutil/channel_layout.h"
 #include "libavutil/intreadwrite.h"
 #include "avformat.h"
 #include "internal.h"
@@ -116,6 +117,8 @@ static int sol_read_header(AVFormatContext *s)
     st->codec->codec_tag = id;
     st->codec->codec_id = codec;
     st->codec->channels = channels;
+    st->codec->channel_layout = channels == 1 ? AV_CH_LAYOUT_MONO :
+                                                AV_CH_LAYOUT_STEREO;
     st->codec->sample_rate = rate;
     avpriv_set_pts_info(st, 64, 1, rate);
     return 0;