libavformat/rmdec.c:594: error: Uninitialized Value
  The value read from len2 was never initialized.

libavformat/rmdec.c:594:13: 
592.     if(type&1){     // frame, not slice
593.         if(type == 3){  // frame as a part of packet
594.             len= len2;
                 ^
595.             *timestamp = pos;
596.         }
