avfoundation

I set up an AVAudioRecorder instance the following way when my view loads: AVAudioSession *audioSession = [AVAudioSession sharedInstance]; audioSession.delegate = self; [audioSession setActive:YES error:nil]; [audioSession setCategory:AVAudioSessionCategoryRecord error:nil]; NSString *tempDir = NSTemporaryDirectory(); NSString *soundFilePath = [tempDir stringByAppendingPathComponent:@"sound.m4a"]; NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath]; NSLog(@"%@", soundFileURL); NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt

I'm trying to ascertain whether it's possible to toggle AirPlay support using the AVAudioPlayer class. From what I have read: AirPlay is a technology that lets your application stream audio to Apple TV and to third-party AirPlay speakers and receivers. AirPlay support is built in to the AV Foundation framework and the Core Audio family of frameworks. Any audio content you play using these frameworks is automatically made eligible for AirPlay distribution. Once the user chooses to play your audio using AirPlay, it is routed automatically by the system. [ Ref ] Based on this info; it should work

I'm trying to do something similar to Tile.app . When it shows a notification, it plays a sound. That seems simple enough-- use UILocalNotification and include the sound file name. But local notifications limit sounds to no more than 30 seconds, and Tile's sound keeps playing for a whole lot longer than that. I expect it's looping, and it continues until I can't stand the noise any more. The sound also plays even if the phone's mute switch is on, which doesn't happen with local notifications. For these reasons, UILocalNotification appears to be out. I thought maybe I could post a text-only

This is my method: -(void) playOrRecord:(UIButton *)sender { if (playBool == YES) { NSError *error = nil; NSString *filePath = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat: @"%d", [sender tag]] ofType:@"caf"]; NSURL *fileUrl = [NSURL fileURLWithPath:filePath]; AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:fileUrl error:&error]; [player setNumberOfLoops:0]; [player play]; } else if (playBool == NO) { if ([recorder isRecording]) { [recorder stop]; [nowRecording setImage:[UIImage imageNamed:@"NormalNormal.png"] forState:UIControlStateNormal];

I'm trying to use the AVFoundation to read barcodes with the below code, but I keep getting the error below. Help as to why would be much appreciated. Thanks in advance! //Create camera view session = AVCaptureSession() var layer = self.cameraView.layer vidLayer = AVCaptureVideoPreviewLayer.layerWithSession(session) as AVCaptureVideoPreviewLayer vidLayer.frame = self.cameraView.bounds vidLayer.videoGravity = AVLayerVideoGravityResizeAspectFill var device = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo) var error:NSError? = nil var input:AVCaptureDeviceInput? =

I am getting error like this In my console: : CGBitmapContextCreate: invalid data bytes/row: should be at least 1920 for 8 integer bits/component, 3 components, kCGImageAlphaPremultipliedFirst. : CGBitmapContextCreateImage: invalid context 0x0 I use below code: - (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer { // Get a CMSampleBuffer's Core Video image buffer for the media data CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); // Lock the base address of the pixel buffer CVPixelBufferLockBaseAddress(imageBuffer, 0); // Get the number of bytes per

I'd like to record the some audio using AVAudioEngine and the users Microphone. I already have a working sample, but just can't figure out how to specify the format of the output that I want... My requirement would be that I need the AVAudioPCMBuffer as I speak which it currently does... Would I need to add a seperate node that does some transcoding? I can't find much documentation/samples on that problem... And I am also a noob when it comes to Audio-Stuff. I know that I want NSData containing PCM-16bit with a max sample-rate of 16000 (8000 would be better) Here's my working sample: private