libavcodec/h264.c:4355: error: Uninitialized Value
  The value read from buf_index was never initialized.

libavcodec/h264.c:4355:5: 
4353.     if (context_count)
4354.         execute_decode_slices(h, context_count);
4355.     return buf_index;
          ^
4356. }
4357. 
