libavdevice/v4l2.c:535: error: Uninitialized Value
  The value read from fps.num was never initialized.

libavdevice/v4l2.c:535:13: 
533.         }
534. 
535.         if (fps.num != tpf->denominator ||
                 ^
536.             fps.den != tpf->numerator) {
537.             av_log(s1, AV_LOG_INFO,
