commit bcd3eb3
Author: Giorgio Vazzana <mywing81@gmail.com>
Date:   Fri Mar 8 13:03:43 2013 +0100

    lavd/v4l2: silence libv4l2 logging
    
    Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 0c1eb85..2d7773a 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -884,6 +884,12 @@ static int v4l2_read_header(AVFormatContext *s1)
     if (!st)
         return AVERROR(ENOMEM);
 
+#if CONFIG_LIBV4L2
+    /* silence libv4l2 logging. if fopen() fails v4l2_log_file will be NULL
+       and errors will get sent to stderr */
+    v4l2_log_file = fopen("/dev/null", "w");
+#endif
+
     s->fd = device_open(s1);
     if (s->fd < 0)
         return s->fd;