avfoundation

I'm trying to play multiple sounds at the same time. The approach initially I've taken was to create several players , but it seems wrong one. What's the best way to play several audio files at the same time. Is it through making them AVAssets, but in this case how would I stop and play them whenever I want. Really appreciate your help. The reason I need AVPlayer is to fetch sounds from the iPod Library. I finally got an answer from TechSupport of Apple Dev Team and it seems I'm on the right track when I decided to use several AVPlayer. For every sound you want to make make a new AVPlayer.

I'm captuting video with AVCaptureSession. But I would like to convert the captured image to an UIImage. I found some code on Internet: - (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer { NSLog(@"imageFromSampleBuffer: called"); // 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 row for the pixel buffer void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer);

I'm trying to play an slow motion video (filmed by the user's iPhone) in an AVPlayer . I am retrieving the AVAsset with a request on a PHAsset from a picker: [manager requestAVAssetForVideo:PHAsset options:videoRequestOptions resultHandler:^(AVAsset * avasset, AVAudioMix * audioMix, NSDictionary * info) {}]; The problem is once it plays, I get this error: -[AVComposition URL]: unrecognized selector sent to instance 0x138d17f40 However, if I set this option on the manager request, it will play as normal speed video at 120/240fps and no crashes: videoRequestOptions.version =

I have an AudioTapProcessor attached to AVPlayerItem. which will call static void tap_ProcessCallback(MTAudioProcessingTapRef tap, CMItemCount numberFrames, MTAudioProcessingTapFlags flags, AudioBufferList *bufferListInOut, CMItemCount *numberFramesOut, MTAudioProcessingTapFlags *flagsOut) when processing. I need to convert the AudioBufferList to CMSampleBuffer so I could use AVAssetWriterAudioInput.appendSampleBuffer to write it into a movie file. So how to convert AudioBufferList to CMSampleBuffer ? I tried this but got -12731 error:Error cCMSampleBufferSetDataBufferFromAudioBufferList

I m trying to create a tutorial video from ipad screen as done in this application (ShowME) Using AVAssetWriter I am able to capture a video of the screen. I tried using AVCaptureDevice, but Its not working. I dont know what is going wrong. I learned capturing video from iphone screen from this link - A very nice turorial. But it does not captures any audio along with screen video. So I gave a try like this: -(void)setUpMike{ NSError* error = nil; // Setup the audio input AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType: AVMediaTypeAudio]; AVCaptureDeviceInput

The iPhone 5S is capable of taking pictures while recording video and I am trying to figure out how I would do this programatically. I know I would be utilizing AVFoundation, however, I couldn't find anything in the programming guide regarding this. I have also checked the sample projects (AVFoundation-related) and it doesn't look like there is anything there that does what I am looking for. if you could help point me in the right direction that would be great. Actually you can do it with any device that can record video: Create and configure a AVCaptureVideoDataOutput . Add it to your

I am trying to stream audio from the microphone to another iPhone via Apples Multipeer Connectivity framework. To do the audio capturing and playback I am using AVAudioEngine (much thanks to Rhythmic Fistman' s answer here ). I receive data from the microphone by installing a tap on the input, from this I am getting a AVAudioPCMBuffer which I then convert to an array of UInt8 which I then stream to the other phone. But when I am converting the array back to an AVAudioPCMBuffer I get an EXC_BAD_ACCESS exception with the compiler pointing to the method where I am converting the byte array to

I am trying to change the Camera View Front and Back .it is working well.if video is recorded without flipping with Pause/Record Option it is working fine.But if we Flip Camera View once then, further recording video is not saving which leads to AVAssetWriterStatusFailed - The operation could not be completed . Can anybody help me to find where i have gone wrong ? Below is my code. Camera.m - (void)flipCamera{ NSArray * inputs = _session.inputs; for ( AVCaptureDeviceInput * INPUT in inputs ) { AVCaptureDevice * Device = INPUT.device ; if ( [ Device hasMediaType : AVMediaTypeVideo ] ) {