Index: libavformat/v4l2.c
===================================================================
--- libavformat/v4l2.c	(revision 10927)
+++ libavformat/v4l2.c	(working copy)
@@ -179,6 +179,14 @@
         *height = fmt.fmt.pix.height;
     }
 
+    // FEFE HACK: unmute
+    {
+      struct v4l2_control control;
+      control.id = V4L2_CID_AUDIO_MUTE;
+      control.value = 0;
+      ioctl(fd, VIDIOC_S_CTRL, &control);
+    }
+
     return res;
 }
 
@@ -627,6 +635,14 @@
         mmap_close(s);
     }
 
+    // FEFE HACK: mute
+    {
+      struct v4l2_control control;
+      control.id = V4L2_CID_AUDIO_MUTE;
+      control.value = 1;
+      ioctl(s->fd, VIDIOC_S_CTRL, &control);
+    }
+
     close(s->fd);
     return 0;
 }