--- libs/libmythtv/avformatdecoder.cpp	2010-09-03 16:24:36.000000000 -0700
+++ libs/libmythtv/avformatdecoder.cpp	2010-09-09 11:52:37.564696596 -0700
@@ -3666,6 +3666,18 @@
     int selTrack = (1 == numStreams) ? 0 : -1;
     int wlang    = wtrack.language;
 
+    if (selTrack < 0 && numStreams)
+    {
+        VERBOSE(VB_AUDIO, LOC + "Trying to select default track");
+        for (uint i = 0; i < atracks.size(); i++) {
+            int idx = atracks[i].av_stream_index;
+            if (ic->streams[idx]->disposition & AV_DISPOSITION_DEFAULT) {
+                selTrack = i;
+                break;
+            }
+        }
+    } 
+
     if ((selTrack < 0) && (wtrack.av_substream_index >= 0))
     {
         VERBOSE(VB_AUDIO, LOC + "Trying to reselect audio sub-stream");