Extracting video frame from MJPEG AVI

[Vini Deep]

Hi, I want to extract a frame from an Motion JPEG avi file. Can anyone help me. Is there any link which gives me an info on the file format for the video data in the avi. I'm able to extract the header from the avi file in BITMAPINFOHEADER struct, and then read the avi property. How are the video frames stored? is it as JPGs or BMPs in Motion Jpeg Avi? I don't want to use the API's available. Kindly help. Vini