avconv.c:2041: error: Uninitialized Value
  The value read from got_output was never initialized.

avconv.c:2041:64: 
2039. 
2040.     // while we have more to decode or while the decoder did output something on EOF
2041.     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
                                                                     ^
2042.         int ret = 0;
2043.     handle_eof:
