libavformat/tiertexseq.c:167: error: Uninitialized Value
  The value read from buffer_num[_] was never initialized.

libavformat/tiertexseq.c:167:9: 
165.     }
166. 
167.     if (buffer_num[0] != 255) {
             ^
168.         if (buffer_num[0] >= SEQ_NUM_FRAME_BUFFERS)
169.             return AVERROR_INVALIDDATA;
