avfoundation

问题 I want to add an image in between videos, just like smiley or clip art. Smiley and Clip art most probably has animation. I referred to Find assets in library - add to a AVMutableComposition - export = crash and also Apple's ALAssetLibrary . but could not get any ideas to complete my requirement. Is there any functionality to add UIImage s and CGImageRef s to an AVMutableComposition ? How can I add an image into a video? 回答1: it has been done with CALayer. If anyone wants to add UIImage in

问题 I am trying to play a button click sound,also that i should be able to manage click sound along with volume button. What i have done is Added AVFoundationFramework to project, in .h file #import <AVFoundation/AVAudioPlayer.h> #import <AVFoundation/AVFoundation.h> in .m file under button click method NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"sound1" ofType:@"mp3"]; NSURL *soundUrl = [NSURL fileURLWithPath:soundPath]; AVAudioPlayer *player = [[AVAudioPlayer alloc]

问题 I need to play multiple sound files. I have the following code: My .h class: #import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> #import <AudioToolbox/AudioToolbox.h> @interface ViewController : UIViewController { AVAudioPlayer *musicPlayer; } - (IBAction)music1:(id)sender; - (IBAction)music2:(id)sender; - (IBAction)music3:(id)sender; - (IBAction)music4:(id)sender; - (IBAction)music5:(id)sender; @end My .m file #import "ViewController.h" @interface ViewController () @end

问题 Below is the code for the camera section, I tried adding in a boolean to detect when the front camera is activated but I receive an error. import UIKit import AVFoundation class MainCameraCollectionViewCell: UICollectionViewCell { @IBOutlet weak var myView: UIView! var captureSession = AVCaptureSession() var backCamera: AVCaptureDevice? var frontCamera: AVCaptureDevice? var currentCamera: AVCaptureDevice? var photoOutPut: AVCapturePhotoOutput? var cameraPreviewLayer:

问题 Below is the code for the camera section, I tried adding in a boolean to detect when the front camera is activated but I receive an error. import UIKit import AVFoundation class MainCameraCollectionViewCell: UICollectionViewCell { @IBOutlet weak var myView: UIView! var captureSession = AVCaptureSession() var backCamera: AVCaptureDevice? var frontCamera: AVCaptureDevice? var currentCamera: AVCaptureDevice? var photoOutPut: AVCapturePhotoOutput? var cameraPreviewLayer:

问题 I was able to record and play opus using AVFoundation. The problem is I got a custom opus audio file (coming from server, also processed in server) as follows: | header 1 (1 byte) | opus data 1 (1~255 bytes) | header 2 (1 byte) | opus data 2 (1~255 bytes) | ... | ... | Each header indicates size of the opus data i.e. if header 1 is 200 (Int) then opus data 1 is 200 bytes So, I am extracting opus data and appending to Data buffer as following: guard let url = Bundle.main.url(forResource: "test

问题 I'm able to record slow motion videos at 120fps using AVFoundation. These videos play as expected on iphone and mac quicktime player. But other players like videojs and my own player[AVPlayer] are not able to play it in slow motion. But if I create a slow motion video using iphone native camera app, then these same players are able to play it as expected. I compared the two videos using mediainfo and two differences came up - 1. Format Profile: High@L5.1 vs High@L4.1 . I used ffpmeg to make

问题 How can I record on the iOS 8 or even iOS 7 (if possible) and switch between cameras while I do so? I have seen apps doing this recording from front camera and then switching to back camera and when the film is completed you can see it entirely filmed from both cameras? I think Glide app has it and maybe Snapchat (not sure on the last one) 回答1: After long searches and struggles, here is the code... thanks for your suggestion Matic for pointing me to the right path, I have made something a

问题 I have created an object class of AVAudioPlayer below in order to play a noise: class MusicAudio: NSObject, AVAudioPlayerDelegate { var bassAudio : AVAudioPlayer! = AVAudioPlayer() override init() { super.init() let bassAudioPath = NSBundle.mainBundle().pathForResource("Raw", ofType:"mp3") let fileURL = NSURL(fileURLWithPath: bassAudioPath!) bassAudio = AVAudioPlayer(contentsOfURL: fileURL, error: nil) bassAudio.currentTime = 0 bassAudio.volume = 1.0 bassAudio.delegate = self } func

问题 I have created an object class of AVAudioPlayer below in order to play a noise: class MusicAudio: NSObject, AVAudioPlayerDelegate { var bassAudio : AVAudioPlayer! = AVAudioPlayer() override init() { super.init() let bassAudioPath = NSBundle.mainBundle().pathForResource("Raw", ofType:"mp3") let fileURL = NSURL(fileURLWithPath: bassAudioPath!) bassAudio = AVAudioPlayer(contentsOfURL: fileURL, error: nil) bassAudio.currentTime = 0 bassAudio.volume = 1.0 bassAudio.delegate = self } func