libavcodec/ac3enc.c:2282: error: Uninitialized Value
  The value read from cpl_start was never initialized.

libavcodec/ac3enc.c:2282:26: 
2280. 
2281.         cpl_end_band   = s->bandwidth_code / 4 + 3;
2282.         cpl_start_band = av_clip(cpl_start, 0, FFMIN(cpl_end_band-1, 15));
                               ^
2283. 
2284.         s->num_cpl_subbands = cpl_end_band - cpl_start_band;
