Sorry if this is out of place, but I beseech the powers that be at Apple to take as much stuff OUT of settings as possible with the next OS update, and make them input parameters. Perhaps a check box in traditional settings scenarios that could move whatever Apple *thinks* should be relegated to settings, so that when you "check" the box, it becomes a input parameter. Again, apologies all around, as this comment is another one of my pie in the sky scenarios.
-George Toledo On Tue, Jan 27, 2009 at 3:40 PM, vade <[email protected]> wrote: > I'd highly suggest you look into QTKit Capture classes. Its not too hard to > get an image from them and supply it as a value for a published input image > key. This way you can supply a User interface of your own design to select > the capture device. > The basic idea is you create your own GL context and pixel format, and init > a QCRenderer using those and a QCComposition with published input image > port. > > When rendering, take an appropriate image from your QTCapture session > output, and call [myQCRenderer setValue:someImageFromQTKitCapture > forKey:@"thePublishedImageKey"] > and then call [myQCRenderer renderForTime:someTime > withArguments:someOptionalArgs]; > > Thats basically it. > > QCRenderers can take a variety of image formats natively (see : > http://developer.apple.com/technotes/tn2005/tn2143.html) , and will handle > the conversion to an optimal internal format *for you*. But you are still > best off sticking with minimal conversion for speed. For QTKit, i *think* > the best option is to deliver a CVOpenGLTextureRef via > QTVisualContextCopyImageForTime. > You can use the QTKit Capture session output class QTCaptureVideoPreviewOutput > and use its setVisualContext: forConnection: method to connect > the QTCaptureVideoPreviewOutput to your OpenGL/QTVisualContext for speed. > > The Video Input patch in QC is severely lacking in the fact that you can > not query for video devices nor programatically set them.. > > On Jan 27, 2009, at 4:54 AM, Anshul jain wrote: > > but the setting depends upon the number of video input connected to PC and > it can change > On 26-Jan-09, at 7:31 AM, Michal Antonic wrote: > > You can load a different composition to QCView (with a different setting) > when needed. > However, the ability to change settings of already loaded compositions > directly would be greatly appreciated. > > Miso > > On 22.1.2009, at 7:21, Anshul jain wrote: > > For capturing LiveVideo i am using Quartz composition example MiniBooth.We > can change video device from the composition (Video Input-> settings). But i > will like the user to change it from the application. How can we do > that.....? Any suggestions are welcomed..... > > Thanks! > > > Anshul > > > > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/quartzcomposer-dev/misoantonic%40gmail.com > > This email sent to [email protected] > > > > Thanks & Regards > > *Anshul jain* > *[email protected]* > > > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/quartzcomposer-dev/doktorp%40mac.com > > This email sent to [email protected] > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/quartzcomposer-dev/gtoledo3%40gmail.com > > This email sent to [email protected] >
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