libavcodec/h264.c:4353: error: Uninitialized Value
  The value read from context_count was never initialized.

libavcodec/h264.c:4353:9: 
4351.         }
4352.     }
4353.     if (context_count)
              ^
4354.         execute_decode_slices(h, context_count);
4355.     return buf_index;
