libavformat/rtpdec_vp8.c:238: error: Uninitialized Value
  The value read from old_timestamp was never initialized.

libavformat/rtpdec_vp8.c:238:13: 
236.         int ret;
237.         if (returned_old_frame) {
238.             *timestamp = old_timestamp;
                 ^
239.             return 1;
240.         }
