Please bear with me, I know that what I'm doing can sound strange, but I can guarantee there's a very good reason for that. I took a movie with my camera, as avi. I imported the movie into iMovie and then exploded the single frames as PNG. Then I repacked these frames into mov using the following code movie, error = QTMovie.alloc().ini...
Hi, I'm trying to use cocoa to grab images from a webcam. I'm able to get the image in RGBA format using the QTKit and the didOutputVideoFrame delegate call, and converting the CVImageBuffer to a CIImage and then to a NSBitmapImageRep. I know my camera grabs natively in YUV, what I want is to get the YUV data directly from the CVImageBu...
I am trying to follow the QTKit tutorial. I add and include the QTKit framework and .h file. I create the QTMovie property. Then in IB I am supposed to drag out the QTMovieView from the library but it isn't there. If I go to the Classes tab, I can find it. However, when I drag it out, it doesn't have the attributes to set like movie sour...
It looks like using core audio to record audio is overly complicated. While QTkit is basic and down to earth However. All of the examples I have see integrate video and audio together. Does some one have or know an example of using QTkit for recording audio? rw ...
I need to grab video via QTCapture from NSView (actually WebView) but I don't know how. Can anyone help me? ...
Hi, I'm trying to get the bitrate of a video stream with Cocoa. Not the bitrate of the overall file but just the stream. I've looked at QTKit's documentation but I couldn't find anything to do this.. ...
Hi, I've been scouring both this site and the net in general for an example cocoa app that uses QTKit or Audio Queue and actually works. Unfortunately, I can't find anything that fits the above description. All I want to do is get a simple audio recording app so I can learn how it works! Please, I have put alot of time into this alre...
Hi - I'm trying to combine two .mp3s into a single .wav file using QTKit. It seems to be working, but the last few seconds of the second file are getting truncated. Any ideas? - (IBAction)combineSelectedFilesAndOutputAsWAV { QTMovie *movie = [QTMovie movieWithFile:fileOne error:NULL]; [movie setAttribute:[NSNumber numberWithBoo...
Hi, I have a QTCaptureSession with one QTCaptureConnection using h.264 for compression. I want to stream the video over UDP with very low latency, but I'm having trouble understanding the QTKit framework. As far as I can see I have two choices for output: 1) Subclass QTCaptureOutput and send the data that would go to the file out on a...
I was just wondering if the QTMovie class does handle URL redirects, because I'm streaming audio files with it and the stream URLs can contain redirects. Sometimes the movie won't start playing but doesn't throw an error (i always operate on the main thread, i know this class is not thread safe). Any ideas why QTMovie might not start pl...
Hi guys, i'd like to grab a frame from my MacBook Pro iSight in C++ and do some elaborations on it. I already know how to do that in ObjC with QTKit, but is there any way to do the same thing in C++? NOTE: I tried to install OpenCV with macports, but the framework doesn't seem to support iSight cameras. Thanks ...
How do I view the progress for converting a Movie with the following QTKit code? NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:YES], QTMovieExport, [NSNumber numberWithLong:kQTFileType3GPP], QTMovieExportType, nil]; [[movieView movie] writeToFile:@"/tmp/sample.3gp" ...
I've been playing with QTKit for a couple of days and I'm successfully able to record video data to a file from the camera using a QTCaptureSession and QTCaptureDeviceInput etc. However what I want to do is send the data to another location, either over the network or to a different object within the same app (it doesn't matter) and the...
Given a sample buffer of H.264, is there a way to extract the frame it represents as an image? I'm using QTKit to capture video from a camera and using a QTCaptureMovieFileOutput as the output object. I want something similar to the CVImageBufferRef that is passed as a parameter to the QTCaptureVideoPreviewOutput delegate method. For s...
Hi, I want to write all frames to disk using QTKit.framework for camera input. But all the images I get are half transparent and without some colors, maybe colorspace problem? ;( They seem good in the preview View but when I write them "something" happens. I wonder what it that. -(void)savePNGImage:(CGImageRef)imageRef path:(NSString *)...
I use QTKit with a QTCaptureMovieFileOutput to capture my iSight Cam. Below you see a short excerpt of the code, which sets the compression options: while ((connection = [connectionEnumerator nextObject])) { NSString *mediaType = [connection mediaType]; QTCompressionOptions *compressionOptions = nil; if ([mediaTy...
I'm reading Apple's documentation on using QTKit to capture streaming audio and video from input sources. I read that the central class QTCaptureSession handles the input and sends it to every possible output (QTCaptureOutput). The documentation lists six subclasses of QTCaptureOutput (e.g., QTCaptureMovieFileOutput). I would like to cr...
Hi, I'm trying to build an application that uses QTKit, with some compress options. I saw this example in the apple developer page QTCompressionOptionsWindow that uses a Window for that purpose. in MyController.m line 65 there is a comment: // ******** Compression Options Window ***** // create our window with the media type and se...