libavcodec/ffv1.c:331: error: Uninitialized Value
  The value read from best_len[_] was never initialized.

libavcodec/ffv1.c:331:20: 
329.                     }
330.                 }
331.                 if(len < best_len[k]){
                        ^
332.                     best_len[k]= len;
333.                     best_state[i][k]= j;
