libavformat/sdp.c:228: error: Uninitialized Value
  The value read from sps_end was never initialized.

libavformat/sdp.c:228:16: 
226.         r = r1;
227.     }
228.     if (sps && sps_end - sps >= 4) {
                    ^
229.         memcpy(p, profile_string, strlen(profile_string));
230.         p += strlen(p);
