avfoundation

There is precious little documentation on AVAudioMix and MTAudioProcessingTap, which allow processing to be applied to the audio tracks (PCM access) of media assets in AVFoundation (on iOS). This article and a brief mention in a WWDC 2012 session is all I have found. I have got the setup described here working for local media files but it doesn't seem to work with remote files (namely HLS streaming URLs). The only indication that this is expected is the note at the end of this Technical Q&A : AVAudioMix only supports file-based assets. Does any one know more about this? is there really no way

I'm just starting out in Objective-C and I'm trying to create a simple app where it shows the camera view with a blur effect on it. I got the Camera output working with the AVFoundation framework. Now, I'm trying to hook up the Core image framework but to no knowledge how to, Apple documentation is confusing for me and searching for guides and tutorials online leads to no results. Thanks in advance for the help. #import "ViewController.h" #import <AVFoundation/AVFoundation.h> @interface ViewController () @property (strong ,nonatomic) CIContext *context; @end @implementation ViewController

I'm trying to take a local m4a or mp3 file and compress/down-sample this file (for the purposes of making a smaller file). Originally, I was using the AVAssetExportSession to export an AVAsset to a temp directory, but I didn't have any control over compression/down-sampling (you can only use presets, which of them, only .wav file formats support quality degradation). Then, following several examples here on SO, I tried using AVAssetReader/AVAssetWriter to preform this 'export'. I create my reader/writer as such: NSString *exportPath = [NSHomeDirectory() stringByAppendingPathComponent:@"out.m4a

How can I get 'AVCaptureVideoPreviewLayer' to display properly in landscape orientation? It works fine in portrait but doesn't rotate, and shows a rotated camera capture when the parent view controller is in landscape orientation. First, the answer - (void)viewWillLayoutSubviews { _captureVideoPreviewLayer.frame = self.view.bounds; if (_captureVideoPreviewLayer.connection.supportsVideoOrientation) { _captureVideoPreviewLayer.connection.videoOrientation = [self interfaceOrientationToVideoOrientation:[UIApplication sharedApplication].statusBarOrientation]; } } - (AVCaptureVideoOrientation

I am trying to simply put a Camera View in my View Controller. I imported AVFoundation at the top, as well as UIImagePickerControllerDelegate and UINavigationControllerDelegate classes. However, whenever I try to use AVCaptureStillImageOutput , Xcode tells me that it was deprecated in iOS10 and I should use AVCapturePhotoOutput . That is completely fine, however, as soon as I want to call stillImageOutput.outputSettings , .outputSettings itself is not available. Thus, I have to use AVAVCaptureStillImageOutput for it to work but I have multiple warnings because this function was deprecated in

I'm playing around with AVSpeechSynthesizer and always getting these errors: ERROR: >aqsrv> 65: Exception caught in (null) - error -66634 ERROR: AVAudioSessionUtilities.h:88: GetProperty_DefaultToZero: AudioSessionGetProperty ('disa') failed with error: '?ytp' My code is: AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc] init]; [synthesizer setDelegate:self]; speechSpeed = AVSpeechUtteranceMinimumSpeechRate; AVSpeechUtterance *synUtt = [[AVSpeechUtterance alloc] initWithString:[[self text] text]]; [synUtt setRate:speechSpeed]; [synUtt setVoice:[AVSpeechSynthesisVoice