I was trying to develop a video management software for which I was evaluating Qt Phonon. The software would be built on windows platform and I understand that Phonon uses Directshow as windows backend and if it runs on Linux it uses GStreamer. Using Qt 4.7.4 on Linux which has a demo example of a video player using phonon I was successfully able to see video stream from panasonic IP camera (RTSP stream), however when I tried the same example on windows platform it does not work (returns error 0x800c0000d). What could be the problem?