原文地址:http://www.cnblogs.com/fusheng-it/p/5760841.html
IJKMediaFramework 文件生成: http://www.jianshu.com/p/b7a646a6c80e
推流完成后,需要拉流才能进行完整的直播。拉流我们采用的也是一个开源的第三方库IJKMediaFramework。
这个库本质是一个播放器,能播放flv格式的播放器。用起来和ios自带的AVPlayer很相似。
实现功能:1.拉流播放。2.监听。
一.创建占位图和卡顿占位动效,代码如下:
//直播前的占位图片
- (UIImageView *)placeHolderView
{if(!_placeHolderView) {
_placeHolderView=[[UIImageView alloc] init];
_placeHolderView.frame=self.view.bounds;
_placeHolderView.image= [UIImage imageNamed:@"profile_user_414x414"];
//强制布局
[_placeHolderView layoutIfNeeded];
}
return_placeHolderView;
}
//卡顿占位动效
- (void)showActivityView{if(!_activity) {
_activity=[[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
_activity.frame= CGRectMake((SCREAM_WEIGHT-100)*0.5, (SCREAM_HIGHT-100)*0.5,100,100);
}
[self.activity startAnimating];
[self.view addSubview:self.activity];
}
//关闭卡顿占位动效
- (void)stopActivityView{if([_activity isAnimating]) {
[_activity startAnimating];
}
[_activity removeFromSuperview];
_activity=nil;
}
二.拉流播放(创建播放器播放),代码如下:
- (void)viewDidLoad {
[super viewDidLoad];
[self.view addSubview:self.placeHolderView];
[self showActivityView];
IJKFFOptions*options =[IJKFFOptions optionsByDefault];
[options setPlayerOptionIntValue:1forKey:@"videotoolbox"];
//帧速率(fps) (可以改,确认非标准桢率会导致音画不同步,所以只能设定为15或者29.97)
[options setPlayerOptionIntValue:29.97forKey:@"r"];
//-vol——设置音量大小,256为标准音量。(要设置成两倍音量时则输入512,依此类推
[options setPlayerOptionIntValue:512forKey:@"vol"];
IJKFFMoviePlayerController*moviePlayer =[[IJKFFMoviePlayerController alloc] initWithContentURLString:PLAY_URL withOptions:options];
moviePlayer.view.frame=self.view.bounds;
moviePlayer.scalingMode=IJKMPMovieScalingModeAspectFill;
//设置自动播放(必须设置为NO, 防止自动播放, 才能更好的控制直播的状态)
moviePlayer.shouldAutoplay =NO;
//默认不显示
moviePlayer.shouldShowHudView =NO;
[self.view insertSubview:moviePlayer.view atIndex:0];
[moviePlayer prepareToPlay];
self.moviePlayer=moviePlayer;
//设置监听
[self addObserver];
[self.view addSubview:self.outBtn];
}
三.设置监听(主要是监听缓存情况),代码如下:
- (void)addObserver
{//监听加载状态改变通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loadStateDidChange:) name:IJKMPMoviePlayerLoadStateDidChangeNotificationobject:self.moviePlayer];
}
- (void)loadStateDidChange:(NSNotification *) notification
{//状态为缓冲几乎完成,可以连续播放
if((self.moviePlayer.loadState & IJKMPMovieLoadStatePlaythroughOK) !=0) {
if(!self.moviePlayer.isPlaying) {
//开始播放
[self.moviePlayer play];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1* NSEC_PER_SEC)), dispatch_get_main_queue(), ^{if(_placeHolderView) {
[_placeHolderView removeFromSuperview];
_placeHolderView=nil;
}
[self stopActivityView];
});
}else{
//如果是网络状态不好, 断开后恢复, 也需要去掉加载
if ([_activity isAnimating]) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1* NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self stopActivityView];
});
}
}
}
//缓冲中
else if (self.moviePlayer.loadState &IJKMPMovieLoadStateStalled) {
[self showActivityView];
/*这里主播可能已经结束直播了。我们需要请求服务器查看主播是否已经结束直播。
方法:
1、从服务器获取主播是否已经关闭直播。
优点:能够正确的获取主播端是否正在直播。
缺点:主播端异常crash的情况下是没有办法通知服务器该直播关闭的。
2、用户http请求该地址,若请求成功表示直播未结束,否则结束
优点:能够真实的获取主播端是否有推流数据
缺点:如果主播端丢包率太低,但是能够恢复的情况下,数据请求同样是失败的。*/
__weaktypeof(self)weakSelf =self;
[[ALinNetworkTool shareTool] GET:PLAY_URL parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task,id_Nullable responseObject) {
NSLog(@"请求成功%@, 等待继续播放", responseObject);
} failure:^(NSURLSessionDataTask * _Nullable task, NSError *_Nonnull error) {
NSLog(@"请求失败, 加载失败界面, 关闭播放器%@", error);
[weakSelf performSelector:@selector(outBtnTouched)];
}];
}
}
四.记得关闭前释放
- (void)dealloc{if(_moviePlayer) {
[_moviePlayer shutdown];
[_moviePlayer.view removeFromSuperview];
_moviePlayer=nil;
}
[[NSNotificationCenter defaultCenter]removeObserver:self];
}
总结:项目中还有许多缺陷等待一一完善。
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