使用AVPlayer在iphone上播放许多不同的视频 [英] Playing many different videos on iphone using AVPlayer
问题描述
我正在使用AVFoundation为iOS定制视频播放器。我们的想法是能够用手势切换到不同的视频（点按，滑动等等）。 现在播放器在模拟器上完美运行，但是当我在实际设备上测试它时，在3或4次滑动后视图变为空白。我甚至为我的播放器创建了播放控件，当视图变为空白时，这些控件正确加载但什么都不做。任何想法的家伙？
这是播放器的初始化
I'm working on a custom video player for iOS using AVFoundation. The idea is to be able to switch to a different video with a gesture (tap, swipe, whatever). Right now the player is working flawlessly on simulator, but when I test it on an actual device, the view goes blank after 3 or 4 swipes. I've even created playback controls for my player, when the view goes blank, these controls load correctly but do nothing. Any ideas guys? This is the initialization for the player
- (id)initWithContentURL:(NSString *)aContentURL delegate:(id)aDelegate {
self = [super initWithNibName:@"NoCashMoviePlayer" bundle:nil];
if (self == nil)
return nil;
delegate = aDelegate;
systemPath = [aContentURL retain];
contentURL = [[NSURL alloc]initFileURLWithPath:systemPath];
asset = [AVURLAsset URLAssetWithURL:contentURL options:nil];
playerItem = [AVPlayerItem playerItemWithAsset:asset];
isPaused = false;
controlsHidden = false;
self.player = [[AVPlayer playerWithPlayerItem:playerItem] retain];
duration = self.player.currentItem.asset.duration;
return self;
}
这是播放视频的代码：
-(void)playMovie{
UITapGestureRecognizer *tapRecon = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(toggleControls:)];
[tapRecon setNumberOfTapsRequired:2];
[self.movieContainer addGestureRecognizer:tapRecon];
[tapRecon release];
NSLog(@"Playing item: %@",contentURL);
playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
[movieContainer.layer addSublayer:playerLayer];
playerLayer.frame = movieContainer.layer.bounds;
playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;
self.seeker.alpha = 1.0;
[self.view addSubview:movieContainer];
[self.movieContainer addSubview:controls];
[self setSlider];
[player play];
player.actionAtItemEnd = AVPlayerActionAtItemEndNone;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(playerItemDidReachEnd:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:[player currentItem]];
}
选择剪辑的代码播放：
-(void)viewSelect: (double) curTime{
self.myView.backgroundColor = [UIColor blackColor];
UISwipeGestureRecognizer *swipeRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
swipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[self.myView addGestureRecognizer:swipeRecognizer];
[swipeRecognizer release];
UISwipeGestureRecognizer *leftRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFromLeft:)];
swipeRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
[self.myView addGestureRecognizer:leftRecognizer];
[leftRecognizer release];
if(isMain){
[UIView animateWithDuration:0.5 delay:0.0 options:UIViewAnimationTransitionFlipFromLeft animations:^{
self.myView.alpha = 1.0;
moviePlayer = [[NoCashMoviePlayer alloc]initWithContentURL:[self movieURL:vidIndex] delegate:self];
self.moviePlayer.view.frame = self.myView.bounds;
self.moviePlayer.view.autoresizingMask = UIViewAutoresizingFlexibleWidth |UIViewAutoresizingFlexibleHeight;
[self.myView addSubview:moviePlayer.view];
}completion:^(BOOL finished) {
[self.moviePlayer.player seekToTime:CMTimeMake(curTime, 1)];
[self.moviePlayer playMovie];
}];
}else{
[UIView animateWithDuration:0.5 delay:0.0 options:UIViewAnimationTransitionFlipFromLeft animations:^{
self.otherView.alpha = 1.0;
moviePlayer = [[NoCashMoviePlayer alloc]initWithContentURL:[self movieURL:vidIndex] delegate:self];
self.moviePlayer.view.frame = self.otherView.bounds;
self.moviePlayer.view.autoresizingMask = UIViewAutoresizingFlexibleWidth |UIViewAutoresizingFlexibleHeight;
[self.otherView addSubview:moviePlayer.view];
}completion:^(BOOL finished) {
[self.moviePlayer.player seekToTime:CMTimeMake(curTime, 1)];
[self.moviePlayer playMovie];
}];
}
}
最后一次手势动作：
- (void)handleSwipeFromLeft:(UISwipeGestureRecognizer *)recognizer {
double elapsedTime = 0.0;
if(vidIndex==0){
vidIndex = 3;
}else vidIndex = vidIndex --;
elapsedTime = [self.moviePlayer currentTimeInSeconds];
[self.moviePlayer stopMovie];
isMain = !isMain;
[self viewSelect: elapsedTime];
}
编辑：尝试为每个视频文件使用不同的AVPlayerLayers，同样情况，在模拟器中工作，而不是在iPad上工作。
Tried using different AVPlayerLayers for each video file, same situation, works in the simulator, not on the iPad.
编辑2：我运行仪器分析核心动画性能，当视频正在播放时，它显示的是帧率30 fps，当玩家空白时，它一直下降到1或2 fps。这可能是可能的，但仍然，如果它有助于提供更多的光......
EDIT 2: I ran instruments to analyze core animation performance, and when the video is playing it's showing framerates of about 30 fps, when the player goes blank it drops all the way down to 1 or 2 fps. This may be ovbious, but still, if it helps give a little more light.....
编辑3：好的，我终于到了某个地方，我知道问题是什么，我有一个核心动画内存泄漏，在模拟器中它工作，因为计算机比iPad有更多的内存，但由于iPad内存非常有限，它停止工作非常快。如果有人对Core Animation漏洞有任何建议，那么它会很受欢迎。
EDIT 3: Ok, I'm finally getting somewhere, I know what the problem is, I have a core animation memory leak, in the simulator it "works" because the computer has A LOT more memory than the iPad, but since the iPad has very limited memory it stops working very quickly. If anyone has any advice regarding Core Animation leaks, it will be very well received.
推荐答案
我最终解决了这个问题。我的设计确实很差，它的内存管理非常糟糕等等。我所做的不是发布我所能做的一切，包括视图，图层，玩家，资产等，我只是创建了一种方法来更新玩家的资产和物品，回收玩家，视图，图层等。
I FINALLY SOLVED IT. The design I had was indeed very poor, It had a very bad memory management and so on. What I did was, instead of releasing everything I could, including views, layers, players, assets, etc, I just created a method to update the player's asset and item, recycling the player, views, layers, etc.
[player pause];
contentURL = [[NSURL alloc] initFileURLWithPath:newPath];
AVAsset *newAsset = [AVURLAsset URLAssetWithURL:contentURL options:nil];
AVPlayerItem *newPlayerItem = [AVPlayerItem playerItemWithAsset:newAsset];
[player replaceCurrentItemWithPlayerItem:newPlayerItem];
[contentURL release];
现在它正在创造奇迹。谢谢大家的帮助。
And now it's working wonders. Thank you all for your help.
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