quartz-composer

Can you control the speed of a video clip playing in Quartz Composer?

Is there a way to manipulate the speed of the video playback? I'm especially interested in a way to slow down with frame blending, exactly like the function in Final Cut Pro. ...

How do you make the background of a video or picture clear in Quartz Composer?

I'd like to remove all of the black from a picture attached to a sprite so that it becomes transparent. ...

How do I use the current sound out as an audio input in Quartz Composer?

If I want to build a spectrum visualizer of what's currently playing on my speakers (not the line in) what do I do? ...

Interfacing Java and Quartz Composer

Hi there, I have written this event photography application that features a slideshow among other things. The application written in Java and is multi-platform. However on Mac OS X, it takes advantage of the graphics abilities of Quartz Composer by including a QC component in a Java window. The component is based on the sample that come...

OpenGL or QuartzComposer for creating OS X widgets

I was watching http://www.youtube.com/watch?v=XiqgmAYrd3c and was thinking it might be kind of fun to create some NSView/UIView-system compatible widgets that had some of the interactions found in the video. Some of them involve some fluid 3-D animation. Has anyone tried using OpenGL or maybe Quartz Composer to create widgets similar to ...

How do I draw a shape in Quartz Composer for every element in an NSArray?

I have an XML file that I have parsed and have put the information I want into several NSArray objects. I want to be able to draw them in a QuartzView (anything better?) to visualize the data. The arrays should all hypothetically contain the same amount of info. I want one array to represent the x axis and another the y. It took long...

Quartz Composer - Structure Key Member bug?

I'm trying to use Quartz Composer to create a continuous integration build radiator. I put together a simple XML file to describe the projects and the latest success of each of their workflows: <projects> <project> <title>Project A</title> <workflows> <workflow> <title>Build 1.0</title> <status>success</...

In Cocoa, how do you apply a QuartzComposer patch effect to an NSImage?

I'm not trying to create a series of QC effects, I just want to use the Tracer effect. Do I have to create the QC thing and then apply that, or can I call it directly in Cocoa? ...

Using QCView and iSight to capture image

Hello all! I have a QCView that loads a Quartz file which gives you iSights feedback (basically like a QTCaptureView) Everything displays fine The button simply takes a snapshot using the following simple lines of code - (void)takePicture:(id)sender {NSImage *currentImage = [outputView valueForOutputKey:@"ImageOutput"]; [[currentImage...

Can't load Quartz animation in screen saver: "You cannot use the XXX screensaver on this computer"

I've written a simple screensaver that loads a Quartz animation using a QCView. But when I install it on Snow Leopard it appears in the Screen Saver preview with a message saying "You cannot use XXX screensaver on this computer...". If I comment out the loadCompositionFromFile line (but leave the Quartz framework linked) it's fine. I ...

Acessing a QC Structure from a Cocoa Application

Hi there, is there a way of acessing a structure from a Cocoa app? I am able to set integers and Strings using the QCView setvalue:forkey method but when i try to access a structure i run into errors. Basicly what i want to do is to pass a byte array into a Quartz composition. greetings matthias ...

Quartz compositions created in Snow Leopard (10.6) doesn't work in Leopard (10.5) despite testing in runtime

Hi I have a reasonably advanced (many patches and subpatches) quartz composition that was created in Snow Leopard but doesn't run well (many elements are not rendered) in Leopard. The composition tested OK via Quartz Composer's Test in Runtime option and works fine for both Leopard 32-bits and Leopard 64-bits (menu item "File | Test in...

Quartz Composer in iPhone UIView

Hi everyone, I am trying to embed a Quartz Composer document in an iPhone app. I know Quartz Composer support was added in iPhone OS 3.1 (at least, that's what Wikipedia says) but I can't find any good resources on how to do this. Do I use CGContext? Or are there more friendly ways to add a Quartz Composer composition? Thanks! ...

Code Interaction with Quartz Composition

Hi, i have a Quartz Composition with a Cube, and X/Y/Z rotation inputs are published. On Interface Builder i made a QCView and a QCPatchController with the previous Quartz Composition loaded. In QCView the Patch Controller is binded, and the rotation published ports are binded too to three NSSlider, so when i change the value of the NSSl...

quartz composer view output: How can I get immediately the new values of outputs, if they change?

Hello, I created a cocoa program with a quartz composer view. I can get the output values with: [qcView valueForOutputKey:@"Output"] But how can I get immediately the new values of outputs, if they change? ...

WMV live stream in Quartz Composer

Is there any way to use a WMV stream in Quartz Composer? I have tried providing the URL of the stream to a Movie Importer patch and enabling asynchronous playback, but nothing happens. I have WMV components (Flip4Mac) for QuickTime installed. Just wondering if this is possible. Thanks! ...

getting values from NSTextField in objective c and xcode

How can I continuously get data from an NSTextField and do this in the background? I'm doing this because I'm using a quartz composer plugin to get posted values in an NSTextField. This is within the same app. Any ideas?? Elijah ...

XCode/Cocoa + Quartz Composer + Interface Builder woes.

Hi, So, I can't seem to get this (I thought rather simple) Cocoa app working properly. I have a Quartz Composer patch which writes text files based on GUI input, then recalls the text files and displays them on a second display (ie projector.) Everything works as expected from inside QC. That's not (as far as I can tell) the problem....

QCView inputKey responds to NO but crashes on YES

Hello, I have a QCView with a boolean input splitter in it. When I try and do [qcview setValue:NO forInputKey:@"showCube"]; it works as expected and the input gets set to NO. However, When I try and do [qcview setValue:YES forInputKey:@"showCube"]; I get EXC_BAD_ACCESS. I have tried using 1, YES, and TRUE and they all give the same erro...

Quartz Composer: switch video inputs with mouse.

Hello. Scenario: two Quicktime movie inputs, one plays on loop unless user clicks left mouse button, in which case second movie plays until the end, then first movie plays. Logically I can see it using a conditional. If number = 1, loop movie 1. If mouse click, number = 2, movie 2 plays. At end of play, number = 1, loop movie 1. Wh...