avfoundation

I would like to record videos with audio using AVCaptureSession . For this I need the AudioSessionCategory AVAudioSessionCategoryPlayAndRecord , since my app also plays back video with sound. I want audio to be audible from the default speaker and I want it to mix with other audio. So I need the options AVAudioSessionCategoryOptionDefaultToSpeaker | AVAudioSessionCategoryOptionMixWithOthers . If I do the following while other audio is playing there is a clear audible glitch in the audio from the other app: [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord

I have a preview layer that is pulling from the camera and working as it should. I would like to be able to take a picture when I press a button. I have inited the AVCaptureStillImageOutput like this: AVCaptureStillImageOutput *avCaptureImg = [[AVCaptureStillImageOutput alloc] init]; Then I am trying to take a picture using this object: [avCaptureImg captureStillImageAsynchronouslyFromConnection:(AVCaptureConnection *) completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) { }]; I need help on how to take a picture and save it in a variable. Thanks vfxdrummer You need to

I am calling AVFoundation 's delegate method to handle a photo capture, but I am having difficulty converting the AVCapturePhoto it generates into an UIImage with the correct orientation. Although the routine below is successful, I always get a right-oriented UIImage ( UIImage.imageOrientation = 3). I have no way of providing an orientation when using the UIImage(data: image) and attempting to first use photo.cgImageRepresentation()?.takeRetainedValue() also doesn't help. Please assist. Image orientation is critical here as the resulting image is being fed to a Vision Framework workflow. func

How would I take the live frames from the iPhone camera, convert them to grayscale, and then display them on the screen in my application? To expand upon what Tommy said, you'll want to use AVFoundation in iOS 4.0 to capture the live camera frames. However, I'd recommend using OpenGL directly to do the image processing because you won't be able to achieve realtime results on current hardware otherwise. For OpenGL ES 1.1 devices, I'd look at using Apple's GLImageProcessing sample application as a base (it has an OpenGL greyscale filter within it) and running your live video frames through that.

I'm building an app using AVFoundation. Just before I call [assetWriterInput appendSampleBuffer:sampleBuffer] in - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection -method. I manipulate the pixels in the sample buffer (using a pixelbuffer to apply an effect). But the client wants me to put in a text (timestamp & framecounter) as well on the frames, but I haven't found a way to do this yet. I tried to convert the samplebuffer to an Image, apply text on the image, and convert the image back

I'm trying to disable any discernable orientation rotation to an AVCaptureVideoPreviewLayer while still maintaining rotation for any subviews. AVCaptureVideoPreviewLayer does have an orientation property, and changing it does allow for the layer to display properly for any orientation. However, the rotation involves some funky rotation of the AVCaptureVideoPreviewLayer, rather than staying smooth as it does in the Camera app. This is how I've gotten orientation to work properly, minus the hitch in the rotation: - (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation

The Apple docs seem to indicate that while recording video to a file, the app can change the URL on the fly with no problem. But I'm seeing a problem. When I try this, the recording delegate gets called with an error... The operation couldn’t be completed. (OSStatus error -12780.) Info dictionary is: { AVErrorRecordingSuccessfullyFinishedKey = 0; } (funky single quote in "couldn't" comes from logging [error localizedDescription]) Here's the code, which is basically tweaks to WWDC10 AVCam sample: 1) Start recording. Start timer to change the output URL every few seconds - (void)