libavformat/utils.c:2560: error: Uninitialized Value
  The value read from ret was never initialized.

libavformat/utils.c:2560:5: 
2558.         av_freep(&s->streams[i]->priv_data);
2559.     av_freep(&s->priv_data);
2560.     return ret;
          ^
2561. }
2562. 
