opus: fix 5.1 encoding

diff --git a/libhb/encavcodecaudio.c b/libhb/encavcodecaudio.c
index 73d44a25ccd461d5b359256c8558e930790dc664..b66a86ffad90ac28e7f3363fcd985191d06d785c 100644 (file)
--- a/libhb/encavcodecaudio.c
+++ b/libhb/encavcodecaudio.c
@@ -127,6 +127,10 @@ static int encavcodecaInit(hb_work_object_t *w, hb_job_t *job)
 
         case HB_ACODEC_OPUS:
             codec_name = "libopus";
+            // Libav's libfdk-aac wrapper expects back channels for 5.1
+            // audio, and will error out unless we translate the layout
+            if (channel_layout == AV_CH_LAYOUT_5POINT1)
+                channel_layout  = AV_CH_LAYOUT_5POINT1_BACK;
             break;
 
         default: