Christopher and vade Thank you for advices!
I wrote a simple code like folloings. It works well but only once I saw that monitor View changed black after monitoring few seconds. So I'll check Reliability and if you have any advice, I'll welcome. // // QTCaptureTestAppDelegate.m // QTCaptureTest // // Source: // http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/QTKitApplicationProgrammingGuide/UsingQTKit/UsingQTKit.html // Created on 10/08/07. // #import "QTCaptureTestAppDelegate.h" *...@implementation* QTCaptureTestAppDelegate *...@synthesize* window; - (*void*)applicationDidFinishLaunching:(NSNotification *)aNotification { *BOOL* success = *NO*; NSError *error; *if*(![qcView loadCompositionFromFile:[[NSBundle mainBundle] pathForResource: @"QC" ofType:@"qtz"]]) { NSLog (@"QC file load error"); *return*; } [ qcView startRendering ]; // Create the capture session. mCaptureSession = [[QTCaptureSession alloc] init]; // Find a video device and connect your inputs and outputs to the session. QTCaptureDevice *videoDevice = [QTCaptureDevice defaultInputDeviceWithMediaType: QTMediaTypeMuxed // Video and Audio device // QTMediaTypeVideo // Video only ]; success = [videoDevice open:&error]; *if* (success == *NO*) { NSLog (@"Open device error"); *return*; } // Add the video device to the session as a device input. mCaptureVideoDeviceInput = [[QTCaptureDeviceInput alloc] initWithDevice:videoDevice]; success = [mCaptureSession addInput:mCaptureVideoDeviceInput error:&error]; *if* (success == *NO*) { NSLog (@"Add the video device to the session error"); *return*; } // Associate your capture view in the UI with the session and start it running. [mCaptureView setCaptureSession:mCaptureSession]; [mCaptureSession startRunning]; // Setup QTCaptureDecompressedVideoOutput to get each fames mCaptureMovieDecomopressOutput = [[QTCaptureDecompressedVideoOutput alloc] init]; [mCaptureMovieDecomopressOutput setDelegate:*self*]; [mCaptureSession addOutput:mCaptureMovieDecomopressOutput error: & error]; } // delegate of QTCaptureDecompressedVideoOutput // Called whenever the video preview output outputs a new video frame. // source: // http://decafish.blog.so-net.ne.jp/2008-08-30-2 - (*void*)captureOutput:(QTCaptureOutput *)captureOutput didOutputVideoFrame:(CVImageBufferRef)videoFrame withSampleBuffer:(QTSampleBuffer *)sampleBuffer fromConnection:(QTCaptureConnection *)connection { *...@synchronized* (*self*) { CVBufferRetain(videoFrame); CIImage *image = [CIImage imageWithCVImageBuffer:videoFrame]; // [previewView setCIImage:image]; [qcView setValue: image forInputKey:@"Image"]; CVBufferRelease(videoFrame); } } *...@end* * * Regards, 2010/8/7 vade <[email protected]> > A work around, if you are so inclined is to use QTKit Capture classes and > feed images to a published input port. Using a QTCaptureSession and 'preview > mode' offers similar (if not the same) performance as Quartz Composers Video > Input patch. > > Publish an image, and then set the value for the key on your QCRenderer > instance, and then call renderAtTime: withArguments: > > This is a bit more involved that a QCView, but totally doable. > > On Aug 6, 2010, at 4:52 PM, Christopher Wright wrote: > > >> I want to select video device of Video Input in QC loaded > >> to QCView from my App. > >> I guess changing "Default" device of Video Input may work. > > > > Changing this will allow you to select a different video device, but > unfortunately it is not programmatically available (your application cannot > change this value; only the QuartzComposer Editor can). This makes it very > limited. > > > > -- > > Christopher Wright > > [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] > >
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