Reading video and making frames of it using MATLAB

Hi,
I am trying to develop a small project for Content Based Video Retrieval (CBVR), based on the YCbCr components of the frames of the video. I've tried reading the video and making it into frames, but in vain.😕

I've tried aviread function. Then, tried Frame = mov(frame).cdata; to get the frame data, which is kept in loop, and some other commands, but couldn't succeed. I've even tried mpegread package, but couldn't even read the mpeg file. 😔

Plzzzzz help me out guys... Once I get the frames, I can move further....

Thanks in advnace.....