libavformat/rmdec.c:521: error: Uninitialized Value
  The value read from seq was never initialized.

libavformat/rmdec.c:521:8: 
519.     //now we have to deal with single slice
520. 
521.     if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
            ^
522.         vst->slices = ((hdr & 0x3F) << 1) + 1;
523.         vst->videobufsize = len2 + 8*vst->slices + 1;
