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Re: Opening camera with specific format/mode?

Subject: Re: Opening camera with specific format/mode?
From: "Alex Majora" <email@hidden>
Date: Thu, 27 Oct 2005 15:05:35 -0500
Delivered-to: email@hidden
Delivered-to: email@hidden

On Oct 27, 2005, at 12:23 PM, Sean Williams wrote:

VDGetCompressionTypes() takes a video digitizer component,
not sequence grabber component.  So after you have properly
configured your sequence grabber video channel, you call
SGGetVideoDigitizerComponent() to get the the underlying digitizer.

Oops, my mistake! Now after setting up the video channel, I feed VDGetCompressionTypes() the video digitizer component, but it returns me an error code of -109, which is a "nilHandleErr". Is it expecting me to somehow initialize/allocate the VDCompressionListHandle structure before invoking the call? I have it declared like this:

VDCompressionListHandle h;

Here is the sequence of calls I'm making:

 OpenDefaultComponent()
 SGInitialize()
 SGSetDataRef()
 SGNewChannel()
 SGSetFrameRate()
 QTNewGWorld()
 SGSetGWorld()
 SGSetChannelBounds()
 SGSetChannelUsage()
 SGGetVideoDigitizerComponent()
 NewSGDataUPP()
 SGPrepare()
   status = VDGetCompressionTypes(theVDIG,h);
 SGStartRecord()

The code continues on and works as before, with low-res video.

Thanks,
Alex


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References:
	>Re: Opening camera with specific format/mode? (From: Sean Williams <email@hidden>)

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