avfoundation

I'm using two third party tools in my project. One is "The Amazing Audio Engine" . I use this for audio filters. The other is GPUImage, or more specifically, GPUImageMovieWriter . When I record videos, I merge an audio recording with the video. This works fine. However, sometimes I do not use The Amazing Audio Engine and just record a normal video using GPUImageMovieWriter. The problem is, even just after initializing The Amazing Audio Engine, the video has only a fraction of a second of audio at the beginning, and then the audio is gone. + (STAudioManager *)sharedManager { static

I'm using the speech synth in AVFoundation, creating an instance of a voice like this: import AVFoundation class CanSpeak { let voices = AVSpeechSynthesisVoice.speechVoices() let voiceSynth = AVSpeechSynthesizer() var voiceToUse: AVSpeechSynthesisVoice? init(){ for voice in voices { if voice.name == "Arthur" { voiceToUse = voice } } } func sayThis(_ phrase: String){ let utterance = AVSpeechUtterance(string: phrase) utterance.voice = voiceToUse utterance.rate = 0.5 voiceSynth.speak(utterance) } } I have two problems. There's no concurrency. Calling this function multiple times results in a

I'm capturing audio from external bluetooth microphone. But I can't record anything. This method is only called one time, at the beginning of the current AvCaptureSession. - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection After that I never get called this method for process the audio. For instantiate the capture session I do this: self.captureSession.usesApplicationAudioSession = true; self.captureSession.automaticallyConfiguresApplicationAudioSession = true; [[AVAudioSession

In my App I'm capturing images using AVFoundation I made a button to switch between front and back cameras but it won't work. Here's the code I used : if (captureDevice.position == AVCaptureDevicePositionFront) { for ( AVCaptureDevice *device in [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo] ) { if ( device.position == AVCaptureDevicePositionBack) { NSError * error; AVCaptureDeviceInput * newDeviceInput = [[AVCaptureDeviceInput alloc]initWithDevice:device error:&error]; [captureSesion beginConfiguration]; for (AVCaptureDeviceInput *oldInput in [captureSesion inputs]) { [captureSesion

I'm trying to set the zoom level of a camera by this code: AVCaptureDevice *videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if ([videoDevice lockForConfiguration:nil]) { float newzoom=1.3; videoDevice.videoZoomFactor = newzoom; [videoDevice unlockForConfiguration]; } This code doesn't not works in ios 7(it works in ios 9), it cause always an exception: Terminating app due to uncaught exception 'NSRangeException', reason: 'videoZoomFactor out of range' I can't find information but the zoom range in ios 7 seems to be "from 1 to 2". But every value i have tried to set

Apple recommends using playInputClick in custom keyboards to simulate a click sound. It's easier to implement AudioServicesPlaySystemSound(1104); so my question then becomes, does playInputClick provide better performance or is it the same thing? Reason Apple recommended this is probably not performance. AudioServicesPlaySystemSound(1104) will probably always play the same sound but playInputClick may play another sound in the future if Apple decides to change the input click sound. So they are the same right now but it might change and if it does your app will be the only one playing the old