ffmpeg: add -guess_layout_max option.

1 files changed, 2 insertions, 0 deletions

diff --git a/ffmpeg.c b/ffmpeg.c
index 6d53edfa64..329b7e420f 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -1443,6 +1443,8 @@ int guess_input_channel_layout(InputStream *ist)
     if (!dec->channel_layout) {
         char layout_name[256];
 
+        if (dec->channels > ist->guess_layout_max)
+            return 0;
         dec->channel_layout = av_get_default_channel_layout(dec->channels);
         if (!dec->channel_layout)
             return 0;