How to render custom video data?

Hi,
I have never done a Qt video application - newbie in this area. I have a custom video file format to render using Qt. The video file format is 256-byte header, then video data, then 256-byte header, then video data and so on.
The header consist info like width, height in pixels, bytes per pixels, frame rate etc. I may have to process data before display - like RGB to YUV or vice-versa (not sure yet). I see there are lot of video related classes like QGL*, QMovie, QVideo* ... don't know where to start. I have seen mandelbrotwidget example which looks like a good place to start but still need some advice.

Thank you,
nkumar