libavcodec/ffv1enc.c:67: error: Uninitialized Value
  The value read from l2tab[_] was never initialized.

libavcodec/ffv1enc.c:67:25: 
65.                 for (m = 1; m < 256; m++)
66.                     if (occ[m]) {
67.                         len -= occ[m] *     (p  * l2tab[m] +
                            ^
68.                                         (1 - p) * l2tab[256 - m]);
69.                     }
