Description of problem:
The opencv package in Fedora is currently built against GStreamer 0.10. Upstream has been defaulting to GStreamer 1.x since December 2013:
https://github.com/Itseez/opencv/commit/8a48802decd4cf355cc0646ad3cd12af40af0bc8

Starting from Fedora 21, we are building the Qt 4 stack (Phonon, QtGStreamer, QtWebKit, Telepathy-Qt4, and the applications using them: ktp-call-ui, kipi-plugins, Kamoso) against GStreamer 1. So the only dependency on GStreamer 0.10 that is left for some KDE applications is through OpenCV.

In addition, those applications now end up with both GStreamer 0.10 and 1.x linked, which is likely to crash&burn. Thus, we need OpenCV to be built with the upstream default GStreamer 1 on Fedora 21 and newer.

Version-Release number of selected component (if applicable):
opencv-2.4.9-1.fc21

How reproducible:
Always

Steps to Reproduce:
1. repoquery --repoid=rawhide --requires opencv

Actual results:
Contains GStreamer 0.10 libraries:
libgstapp-0.10.so.0
libgstbase-0.10.so.0
libgstreamer-0.10.so.0
libgstvideo-0.10.so.0

Expected results:
Contains GStreamer 1.x libraries (libgst*-1.0.so.*) instead.

Additional info:
All that should be needed is to change (or conditionalize) this line:
%{!?_without_gstreamer:BuildRequires:  gstreamer-devel gstreamer-plugins-base-devel}
in the specfile (use gstreamer1-* instead). The version of GStreamer to use is automatically detected (with 1.x being preferred in current releases of OpenCV).