Re: grabbing frames - MPEG vs AVI

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: The March Hare \(MVP\) (phil_at_ndsm.maps)
Date: 03/18/04 

Date: Thu, 18 Mar 2004 12:31:01 -0700

> I am working on a frame grabber program to extract all the frames of a
> video using a proxy transform filter. For avi's, all the frames
> appear to be extracted. But for MPEGs, it appears to be losing
> frames. For example, a mpeg video that should have 154 frames has 128
> frames extracted. What would be the difference between MPEG and AVI
> that might cause this?

Possible reason: frame dropping.

> Any suggestions on a fix?

Pause the graph and step through each frame using
IMediaSeeking::SetPositions

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