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[REPOST] Sample Code for QTPixelBufferContextCreate

Posted this before but didn't get any help. If someone out there knows how to do this, I'd really appreciate hearing from you.

Best Wishes,
Mark

---

Is there any sample code available that illustrates the usage of QTPixelBufferContextCreate and NewMovieFromProperties? I couldn't find any on the Apple site, and the documentation is a bit sparse.

Specifically, I'm trying to create an ARGB bitmap. I'm using the following code to create the context:

---------->

OSType pixelType = k32ARGBPixelFormat;
cfNumPixelType = ::CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &pixelType);
ThrowIfNil_(cfNumPixelType);

pixBufDict = ::CFDictionaryCreateMutable(kCFAllocatorDefault, 1, NULL, NULL);
ThrowIfNil_(pixBufDict);

::CFDictionaryAddValue(pixBufDict, kCVPixelBufferPixelFormatTypeKey, cfNumPixelType );

err = ::QTPixelBufferContextCreate(kCFAllocatorDefault, pixBufDict, &context);
ThrowIfOSErr_(err);

<----------

And then the next snippet to create the movie:

---------->
Boolean active = false;

QTNewMoviePropertyElement params[] =
{
{ kQTPropertyClass_DataLocation, kQTDataLocationPropertyID_CFURL, sizeof(CFURLRef), &cfURLRef, noErr },
{ kQTPropertyClass_NewMovieProperty, kQTNewMoviePropertyID_Active, sizeof(Boolean), &active, noErr },
{ kQTPropertyClass_Context, kQTContextPropertyID_VisualContext, sizeof(QTVisualContextRef), &context, noErr }
};

SInt32 bytes = sizeof(params);
SInt32 divisor = sizeof(QTNewMoviePropertyElement);
SInt32 inPropCount = bytes / divisor;

err = ::NewMovieFromProperties(inPropCount, params, 0, NULL, outMovie);
ThrowIfOSErr_(err);

<----------

Does this look correct?

Thanks in advance,
Mark

--

--
=====================================================================
Mark Coniglio, Artistic Co-Director | email@hidden
Troika Ranch Dance Theater          | http://www.troikaranch.org
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