avcapturesession

Initial Context I am developping an augmented reality application location based and I need to get the field of view [FOV] (I just update the value when the orientation change, so I am looking for a method which can get this value when I call it) The goal is to make a "degree ruler" relevant to reality like the following: I am already using AVCaptureSession to display camera stream ; and a path coupled with a CAShapeLayer to draw the ruler. This is working pretty good, but now I have to use Field of view value to place my element in the right place (choose the right space between 160° and 170°

First I want to discuss the scenario happening in snapchat . In snapchat when you start recording video and song is running in background; It allows continue that song while recording video and after you record that video you can also able to hear that song in background. I am using SCRecorder for recording video and capture image with my custom layout . Now in that I want to do just like above scenario but problem is whenever I start recording the video in background song is stopped playing. SCRecorder is using AVCaptureSession for recording video. So how can I resolve this two problem: Allow

I'm developping an app which requires capturing framebuffer at as much fps as possible. I've already figured out how to force iphone to capture at 60 fps but - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection method is being called only 15 times a second, which means that iPhone downgrades capture output to 15 fps. Has anybody faced such problem? Is there any possibility to increase capturing frame rate? Update my code: camera = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo

All, I have a basic question that I am struggling with here. When you look at the findmyicone sample code from WWDC 2010, you will see this: static const uint8_t orangeColor[] = {255, 127, 0}; uint8_t referenceColor[3]; // Remove luminance static inline void normalize( const uint8_t colorIn[], uint8_t colorOut[] ) { // Dot product int sum = 0; for (int i = 0; i < 3; i++) sum += colorIn[i] / 3; for (int j = 0; j < 3; j++) colorOut[j] = (float) ((colorIn[j] / (float) sum) * 255); } And then it is called: normalize(orangeColor, referenceColor); Running the debugger, it is converting BGRA: (Red