Media Sample not keeping up with the Fast Forward speed

Question

Hi,
I have written a transform filter to play an AVI file and it works fine when played at normal speed. However, when I set the speed to 6x and play the same file, I notice that the supply of media sample into my Transform filter does not come at 6x. but instead comes at about 3x. So when I play my file at Fast speed in Windows Media Player, even though the progress bar moves at 5x the video lags far behind. In debug mode, I removed all the processing code and just checked the rate of incoming data (by tracing a counter) and it verifies that the rate is very slow.

Can anyone explain to me why this could be happening, and how I can remedy this problem.

Thanks.
Amin.

Answer 1

There is a bottle neck somewhere.  Either the rendering or decoding is the likely culprit.

How many CPU cores and what is the CPU usage at the 6x rate?

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