avplayer

问题 This is my code in the viewDidLoad : AVPlayerItem* playerItem = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"http://groove.wavestreamer.com:7321/listen.pls?sid=1"]]; [playerItem addObserver:self forKeyPath:@"timedMetadata" options:NSKeyValueObservingOptionNew context:nil]; music = [[AVPlayer playerWithPlayerItem:playerItem] retain]; [music play]; My question: How can I create a button, that fast-forwards / fast-backwards the stream 5 seconds, when it´s pressed? Thank you for your

问题 I am playing songs by using AVPlayer. I am able to play it in background as well. There is a UIButton called showPlaylist . When I tap on it I need to display list of songs which I have selected from ipodLibrary in UITableView and I should be able to display artwork, number of mins remaining in the song and the artist's name if it is available in the song. I have play and pause buttons: when I click the pause button, the song is paused but when I tap on the play button again, it goes to the

问题 Hi I'm using the following code to record audio on Android myRecorder = new MediaRecorder(); myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); myRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); myRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); myRecorder.setAudioSamplingRate(44100); myRecorder.setAudioEncodingBitRate(256); myRecorder.setAudioChannels(1); voiceFileName = getFilename(); myRecorder.setOutputFile(voiceFileName); private String getFilename() { String

问题 I currently have an AVQueuePlayer playing a few .aif files in sequence. As it goes through each audio I want to perform an action related to that specific sound (for example changing an imageview's uiimage). My problem is setting the NSNotification correctly. I've set it to notify me when the queue finished with the last object, but I'm having trouble receiving an a notification for each current item. Here is what I have: //Setting Up My Queue List yellowVoice = [[AVPlayerItem alloc]

问题 In ios10 ， I want to get video capture, but get an error "[CIImage initWithCVPixelBuffer:options:] failed because its pixel format p422 is not supported." My code is this: func previewImage(handle: (image: UIImage?) -> Void) { dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), { () -> Void in dispatch_async(dispatch_get_main_queue(), { () -> Void in guard let time = self.player?.currentTime() else { return } guard let pixelBuffer = self.output?

问题 I'm new to Swift and am trying to add a video to the view and then remove it when my "stopScreenSaver" notification is dispatched. All seems to work well except for when I go to remove the video layer (playerLayer.removeFromSuperlayer()). Any guidance would be appreciated. I feel like I'm missing some basic concept here for adding and removing the layer! import UIKit import AVFoundation import QuartzCore import CoreMedia class ViewController: UIViewController { let contentURL = NSBundle

问题 I'm creating custom video player, and i want to create toggle button for CC. I saw this post : IOS AVPlayer cannot disable closed captions So I tried : AVMediaSelectionGroup *group = [self.avPlayer.currentItem.asset mediaSelectionGroupForMediaCharacteristic:AVMediaCharacteristicLegible]; [self.avPlayer.currentItem selectMediaOption:nil inMediaSelectionGroup:group]; Didn't work.. cc still visible. also tried : AVPlayerItemLegibleOutput *output = [[AVPlayerItemLegibleOutput alloc] init];

问题 Based on the answer from this question, I have implemented an event handler that detects when an AVPlayerItem finishes 'naturally'(through AVPlayerItem.DidPlayToEndTimeNotification ) and when it finishes because the user has used the seek bar to reach the end of the video (through AVPlayerItem.TimeJumpedNotification ). I would like to extend this further by checking, in the event handler for the second case, whether the user has stopped seeking - i.e their finger has been lifted from the

问题 I have a AVPlayer with 4 sec video ( NSTimeInterval duration = CMTimeGetSeconds(self.playerItem.asset.duration) = 4). I'd like to update UI with changes: self.periodicTimeObserver = [self.player addPeriodicTimeObserverForInterval:CMTimeMake(1, 1) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) { [weakSelf currentTimeDidChange:CMTimeGetSeconds(time)]; }]; But for some reasons I get extra calls to UI: - (void)currentTimeDidChange:(NSTimeInterval)currentTime { NSLog(@"timePassed %f,

问题 If I load an AVPlayer with a file from a host with [AVPlayer playerWithPlayerItem:playerItem]; And the " buffering " takes longer than the user wants, how do I allow them to cancel it? 回答1: So the correct answer is @Che with: If you will call [self.player replaceCurrentItemWithPlayerItem:nil]; buffering stops. – Che Oct 13 at 14:36 and you do so on the observer listening for the status update from the playerWithPlayerItem. Thanks All! 回答2: I don't think there is a method to directly stop