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:
It's returning -109 (nilHandleErr) because you're passing it a nil
handle. Isn't it great when error codes are actually descriptive and
helpful? Before calling VDGetCompressionTypes, you need to NewHandle
() your handle:
h = (VDCompressionListHandle)NewHandle(0);
The VDGetCompressionTypes calls will resize your handle. Don't
forget to DisposeHandle(h) when you're done with it.
-Brad Ford
QuickTime Engineering
SGStartRecord()
The code continues on and works as before, with low-res video.
Thanks,
Alex
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