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Blackmagic studio directshow problems

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Toni Rutar Lokar
Blackmagic studio directshow problems
on Apr 1, 2010 at 1:24:40 pm


I started working on some video processing, and installed two BlackMagic Studio cards in the system (taking capture from first, process the video and render to the second). And now I'm facing a strange problem, namely video skipping. Thus I simply connected video capture output to renderer input and noticed the same problem. Sometimes it happens straight away, while sometimes I have to wait for anything up to 15-20 minutes till skipping starts. Then it keeps skipping for a few minutes and goes back to smooth playout for next approx 20 minutes, etc. To me it appears as though the cards are not synced properly. (I'm talking 8bit YUV PAL capture/playback) Driver version is 7.5.2.

On the other hand - non directshow implementation (InputLoopThrough sample from SDK) works flawlessly. Anyone has any idea on how to get the Directhow graph working properly?

Greets, Toni

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