Frame Rate

Hi all

I have converted the OopenGL screen to an AVI file. But the Frame Rate and Actual Frame Rate is diferent.
How can I synchronise both so that I can see the image in 30 fps.

now It is displaying Actual Rate 30 fps when I gave “m_strhdr.dwRate = 300;”. While playing frame rate is 300 but Actual rate is 30. How this can be made equal. If anybody knows the answer please help me.

Thanks in advance