avfoundation

I'm very new to Swift and Ios programming. I like to, as mentioned above, insert my own metadata to captured images before i save them to album. I'm trying to get this done with this code. The saved image does not contain my own metadata, but its generated metadata. Can anybody please tell me what I'm doing wrong? Or maybe isn't it possible to add own new metadata table to captured images? Thanks a lot for your help @IBAction func btnPressed(sender: UIButton) { capturePicture() } func capturePicture(){ stillImageOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG] session.addOutput

I am using a private library which was made for live broadcasting from iPhone. In every time of recording each frame it call a delegate function void MyAQInputCallback(void *inUserData, AudioQueueRef inQueue, AudioQueueBufferRef inBuffer, const AudioTimeStamp *inStartTime, UInt32 inNumPackets, const AudioStreamPacketDescription *inPacketDesc); Now how I can append this inBuffer to my AVAssetWriterInput as usual: [self.audioWriterInput appendSampleBuffer:sampleBuffer]; I think maybe convert AudioQueueBufferRef to CMSampleBufferRef somehow? Thank you. I don't suppose you are still looking for a

I currently use the following code to shoot a series of images: - (void)shootSeries:(int)photos { if(photos == 0) { [self mergeImages]; } else { [output captureStillImageAsynchronouslyFromConnection:connection completionHandler: ^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) { NSLog(@"Shot picture %d.", 7 - photos); [self shootSeries:(photos - 1)]; CVPixelBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(imageDataSampleBuffer); CVPixelBufferLockBaseAddress(pixelBuffer, 0); int dataSize = CVPixelBufferGetDataSize(pixelBuffer); CFDataRef data = CFDataCreate(NULL, (const UInt8 *

Many similar questions but not Exactly the same. I currently have my code setup to play video via an AVPlayer. What I'm wanting to do is somehow extract the audio of the streaming video and eventually merge with the Mic Input (using AVAudioMixer?). (think Karaoke app) so when the user plays the recording it will play back the audio only from the video and the recording from the mic. I think AVAudioEngine is the way to go but i cannot for the life of me work it out. So my question is how do i extract or record the audio from the currently playing video in AVPlayer and importantly which is

We are trying to understand how to control/specify the frame rate for videos that we are encoding with AVAssetReader and AVAssetWriter . Specifically, we are are using AVAssetReader and AVAssetWriter to transcode/encode/compress a video that we have accessed from the photo/video gallery. We are able to control things like bit rate, aspect ratio changes, etc., but cannot figure out how to control the frame rate. To be specific, we'd like to be able to take as input a 30 FPS video that's 5 minutes long and emit a 5 minute video at 15 FPS. Our current loop that processes sample buffers is:

I'm trying to set up a basic example in a Swift playground (code below) but have also tried it with Objective-C with the same result. import AVFoundation let fileURL = ... // have tried a wav file and a aiff file let myAudioFile = AVAudioFile(forReading: fileURL, error: nil) let myAudioFormat = myAudioFile.fileFormat let myAudioFrameCount = UInt32(myAudioFile.length) var myAudioBuffer = AVAudioPCMBuffer(PCMFormat: myAudioFormat, frameCapacity: myAudioFrameCount) // have also tried a smaller frameCapacity It works fine up to this point, but then terminates with this: var myError: NSError?

I have a photo taking app that is using AVFoundation . Once an image is captured, I have 2 core graphics methods that I have to run in order to properly rotate and crop the image. When testing this using the typical AVFoundation setup for capturing camera photos with a session preset of AVCaptureSessionPresetPhoto , I was always receiving a ton of memory warnings and I spent 2 weeks trying to solve these and I finally gave up. I ended up ditching the typical captureStillImageAsynchronouslyFromConnection setup and using another setup that just "captures" the video frames. This new method works