DirectShow IMediaSeeker

OK, I'm playing a videofile using IMediaControl and IGraphBuilder, and it works great.

When the playback i paused and I try to seek using IMediaSeeker, it works. However, the frame at the new position doesn't show uop until the playback starts again.

How do I seek to a new position and display the frame at that position without starting the playback?

Perhaps some code is appropriate:

This method jumps back 0.2 seconds, but it doesn't display the fram until the playback resumes.

Code:

// DirectShow interfaces
IMediaSeeking *pMS = NULL;
//..
void GoBack()
{
    HRESULT hr;

    if (!pMS)
        return;

    if (g_psCurrent == Paused)
    {
        double BackTime      = -0.2;
        LONGLONG BackTimeFmt = BackTime * 10000000.0;
        LONGLONG MediaStreamTime,CurrentMediaStreamTime,Dummy;
        pMS->ConvertTimeFormat(&MediaStreamTime,NULL,BackTimeFmt,&TIME_FORMAT_MEDIA_TIME);
 

        pMS->GetPositions(&CurrentMediaStreamTime,&Dummy);
        MediaStreamTime += CurrentMediaStreamTime;
        pMS->SetPositions(&MediaStreamTime,AM_SEEKING_AbsolutePositioning,NULL,AM_SEEKING_NoPositioning);
    }
}
//..

By the way: Why was the forum down for about a week recently?

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