Problem with skipped frames

Hi every one,

I have build a video-decoder transform filter. This filter seems to
work fine in the MediaPlayer when I replay *.avi files with my own
FourCC code, which my decoder filter is registered for.
The "transform" function of my filter, which is loaded into the
MediaPlayer-Graph receives buffers with video-frames in form of a
"MediaSample".

Now I discovered, that the MediaPlayer does not send EVERY SINGLE
MediaSample to my filter. Some MediaSamples seem missing. Since my
decoder (H.264) works with temporal compression, a missing Sample
(video frame) messes up the decoding of all following frames.
I can prove that frames are missing, because the "Frame Number" (part
of the encoded bitstream) in the samples is not continuously.
Surprisingly though, calling the method
VideoTransformFilter->IsDiscontinuity() ALWAYS returns FALSE, and
VideoTransformFilter->GetMediaTime( pStartTime, pEndTime) shows
continues timing.
Can anybody explain this behaviour, and maybe knows how I can encorce
a "non-skipping" policy.

Regards
Peter

.

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