libavformat/srtp.c:195: error: Uninitialized Value
  The value read from roc was never initialized.

libavformat/srtp.c:195:9: 
193.         s->seq_initialized = 1;
194.         s->seq_largest     = seq_largest;
195.         s->roc             = roc;
             ^
196. 
197.         ext  = buf[0] & 0x10;
