libavformat/id3v2.c:201: error: Uninitialized Value
  The value read from tflags was never initialized.

libavformat/id3v2.c:201:13: 
199.         next = url_ftell(s->pb) + tlen;
200. 
201.         if (tflags & ID3v2_FLAG_DATALEN) {
                 ^
202.             avio_rb32(s->pb);
203.             tlen -= 4;
