libavformat/rtpdec_jpeg.c:262: error: Uninitialized Value
  The value read from qtable_len was never initialized.

libavformat/rtpdec_jpeg.c:262:45: 
260.         jpeg->hdr_size = jpeg_create_header(hdr, sizeof(hdr), type, width,
261.                                             height, qtables,
262.                                             qtable_len > 64 ? 2 : 1);
                                                 ^
263. 
264.         /* Copy JPEG header to frame buffer. */
