libavcodec/svq1enc.c:190: error: Uninitialized Value
  The value read from best_vector[_] was never initialized.

libavcodec/svq1enc.c:190:13: 
188.             }
189.             assert(best_vector_mean != -999);
190.             vector = codebook + stage * size * 16 + best_vector[stage] * size;
                 ^
191.             for (j = 0; j < size; j++)
192.                 block[stage + 1][j] = block[stage][j] - vector[j];
