avfoundation

I'm building an app that should allow user to apply audio filters to a recorded audio, such as Reverb, Boost. I was unable to find any viable source of information on how to apply filters to a file itself, because it's needed to upload processed file to server later. I'm currently using AudioKit for visualization, and I'm aware that it's capable of doing audio processing, but only for playback. Please give any suggestions for further research. AudioKit has an offline render node that doesn't require iOS 11. Here's an example, the player.schedule(...) and player.start(at.) bits are required as

Just starting out with AVKit, and I'm trying to play some audio. It would be nice to use the new AVPlayerViewController detailed in Mastering Modern Media Playback so that I have a ready-made play/pause/seek UI. I basically have a storyboard with a container view which has an embed segue to the AVPlayerViewController. Then I use: override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { if (segue.identifier == "embedAudio") { var playerViewController:AVPlayerViewController = segue.destinationViewController as AVPlayerViewController playerViewController.player = AVPlayer(URL

I want to grab frames from a video at a specific time. I'm calling my grab-frame-function with a time specified as seconds as a Float64. The problem is that it doesn't grab the current frame. It seems to ignore the decimals. If I call the function with for example 1.22 and 1.70 it will return the same frame. I'm quite new when it comes to Swift so I guess I don't get the CMTime object right. So can anyone see what's wrong with this? func generateThumnail(url : NSURL, fromTime:Float64) -> UIImage { var asset :AVAsset = AVAsset.assetWithURL(url) as! AVAsset var assetImgGenerate :

i am developing an application in which i am trying to record a video using AVCaptureSession class...i came across a few good tutorials like this one http://www.benjaminloulier.com/posts/2-ios4-and-direct-access-to-the-camera but in these tutorials only capturing images from the video frames is done while i want to record a full length video which i can either save in my device or upload it to my server....How can i achieve this using AVFoundation framework?? Check out the sample code from the WWDC 2010 http://developer.apple.com/videos/wwdc/2010/ for example the AVCamDemo. Login to your

When I load a video from the internet (10-40MB large) I am unable to provide a smooth playing experience. My AVPlayer either loads the whole video and then plays it, or plays 1s, buffers and then just stops playing. I tried endless libraries, buffer-observer methods, and tutorials. Nothing seems to help. . . . self.makeLoaderVisible() let playerItem = AVPlayerItem(url: url) playerItem.addObserver(self, forKeyPath: "playbackBufferEmpty", options: .new, context: nil) playerItem.addObserver(self, forKeyPath: "playbackLikelyToKeepUp", options: .new, context: nil) playerItem.addObserver(self,

I am doing video recording using AVFoundation . I have to crop the video to 320x280. I am getting the CMSampleBufferRef and converting it to UIImage using the below code. CGImageRef _cgImage = [self imageFromSampleBuffer:sampleBuffer]; UIImage *_uiImage = [UIImage imageWithCGImage:_cgImage]; CGImageRelease(_cgImage); _uiImage = [_uiImage resizedImageWithSize:CGSizeMake(320, 280)]; CMSampleBufferRef croppedBuffer = /* NEED HELP WITH THIS */ [_videoInput appendSampleBuffer:sampleBuffer]; // _videoInput is a AVAssetWriterInput The imageFromSampleBuffer: method looks like this: - (CGImageRef)

I tried to answer this in the original thread however SO would not let me. Hopefully someone with more authority can merge this into the original question. OK here is a more complete answer. First, setup the capture: // Create capture session self.captureSession = [[AVCaptureSession alloc] init]; [self.captureSession setSessionPreset:AVCaptureSessionPresetPhoto]; // Setup capture input self.inputDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; AVCaptureDeviceInput *captureInput = [AVCaptureDeviceInput deviceInputWithDevice:self.inputDevice error:nil]; [self

I want to get a thumbnail of videos (*.mov) which taken with iPhone/iPAD. I am trying to use AVFoundation library for this and getting this error: couldn't generate thumbnail, error:Error Domain=AVFoundationErrorDomain Code=-11822 "Cannot Open" UserInfo=0x15d90a30 {NSLocalizedDescription=Cannot Open, NSLocalizedFailureReason=This media format is not supported.} Code: NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentDir=[paths objectAtIndex:0]; NSString *videoPath=[documentDir stringByAppendingPathComponent:[NSString