IOS流媒体播放
1. 这里的流媒体地址是指服务端那边已经调好格式的可以在ios上播放的视频流。
下面提供几个视频流的地址：
NSString *linkStr =
http://61.160.227.6/rtencode_m3u8?bl=/f4v/61/140783661.h264_2.f4v&t=8&em=1&se=c629000050724fef&k=8bb5b375af9ab17fa859074fb394455fcd7505",
@"http://61.160.230.12/rtencode_m3u8?bl=/f4v/85/140698785.h264_2.f4v&t=8&em=1&se=b245000050723fb4&k=0dfa39da8293f0684c6cd84fb395905fcd7505",
@"http://58.215.144.42/rtencode_m3u8?bl=/f4v/46/140739646.h264_1.f4v&t=8&em=1&se=751300005072e2d8&k=8d77cf2355c3bf817f6e364fb396005fcd7505“
@"http://ocj2.smgbb.cn/ocj1/ocj1.m3u8"
@"http://ocj2.smgbb.cn/ocj2/ocj2.m3u8"
2.播放视频
CustomPlayerView.h 文件
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@interface CustomPlayerView : UIView
@property(nonatomic,retain) AVPlayer *player;
@end
CustomPlayerView.m 文件
#import "CustomPlayerView.h"
@implementation CustomPlayerView
+(Class)layerClass{
return [AVPlayerLayer class];
}
-(AVPlayer*)player{
return [(AVPlayerLayer*)[self layer] player];
}
-(void)setPlayer:(AVPlayer *)thePlayer{
return [(AVPlayerLayer*)[self layer] setPlayer:thePlayer];
}
@end
CustomMoviePlayerController.h 文件
#import <UIKit/UIKit.h>
#import "CustomPlayerView.h"
#import "MBProgressHUD.h"
@interface CustomMoviePlayerController : UIViewController<UIPopoverControllerDelegate>{
IBOutlet CustomPlayerView *moviePlayeView;
IBOutlet UIButton *playButton;
IBOutlet UISlider *movieProgressSlider;
//视频的总时间
CGFloat totalMovieDuration;
IBOutlet UILabel *currentTimeLabel;
IBOutlet UILabel *totalTimeLabel;
MBProgressHUD *loadingView;
}
@property(nonatomic,retain) NSURL *movieURL;
-(IBAction)doneClick:(id)sender;
-(IBAction)playClick:(id)sender;
-(IBAction)movieProgressDragged:(id)sender;
@end
CustomMoviePlayerController.m文件
//
// CustomMoviePlayerController.m
// VideoStreamDemo2
//
#import "CustomMoviePlayerController.h"
@interfaceCustomMoviePlayerController()
-(void)initPlayer;
-(void)monitorMovieProgress;
-(NSString*)convertMovieTimeToText:(CGFloat)time;
-(void)initMoviewPreview;
-(CustomPlayerView*)previewViewCreate:(CGFloat)xOffsetInSlider;
@end
@implementation CustomMoviePlayerController
@synthesize movieURL;
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[superviewDidLoad];
// Do any additional setup after loading the view from its nib.
loadingView = [[MBProgressHUDalloc]initWithView:self.view];
loadingView.labelText = @"正在加载...";
[self.view addSubview:loadingView];
[self initPlayer];
[self monitorMovieProgress];
[self initMoviewPreview];
}
- (void)dealloc {
[movieURL release];
[loadingViewrelease];
//释放对视频播放完成的监测
[[NSNotificationCenterdefaultCenter]removeObserver:selfname:AVPlayerItemDidPlayToEndTimeNotificationobject:moviePlayeView.player.currentItem];
//释放掉对playItem的观察
[moviePlayeView.player.currentItemremoveObserver:self
forKeyPath:@"status"
context:nil];
[moviePlayeViewrelease];
[super dealloc];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return interfaceOrientation!=UIInterfaceOrientationPortraitUpsideDown;
}
-(void)initPlayer{
//显示loadingView
[loadingView show:YES];
//使用playerItem获取视频的信息，当前播放时间，总时间等
AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:movieURL];
//player是视频播放的控制器，可以用来快进播放，暂停等
AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem];
[moviePlayeView setPlayer:player];
[moviePlayeView.player play];
//计算视频总时间
CMTime totalTime = playerItem.duration;
//因为slider的值是小数，要转成float，当前时间和总时间相除才能得到小数,因为5/10=0
totalMovieDuration = (CGFloat)totalTime.value/totalTime.timescale;
//NSLog(@"totalMovieDuration:%f",totalMovieDuration);
//在totalTimeLabel上显示总时间
totalTimeLabel.text = [selfconvertMovieTimeToText:totalMovieDuration];
//检测视频加载状态，加载完成隐藏loadingView
[moviePlayeView.player.currentItemaddObserver:self
forKeyPath:@"status"
options:NSKeyValueObservingOptionNew
context:nil];
//添加视频播放完成的notifation
[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(moviePlayDidEnd:)name:AVPlayerItemDidPlayToEndTimeNotificationobject:moviePlayeView.player.currentItem];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
// NSLog(@"keyPath:%@,object:%@",keyPath,NSStringFromClass([object class]));
if ([keyPath isEqualToString:@"status"]) {
AVPlayerItem *playerItem = (AVPlayerItem*)object;
if (playerItem.status==AVPlayerStatusReadyToPlay) {
//视频加载完成，隐藏loadingView
[loadingView hide:YES];
}
}
}
-(NSString*)convertMovieTimeToText:(CGFloat)time{
//把秒数转换成文字
if (time<60.f) {
return [NSString stringWithFormat:@"%.0f秒",time];
}else{
return [NSString stringWithFormat:@"%.2f",time/60];
}
}
-(void)monitorMovieProgress{
//使用movieProgressSlider反应视频播放的进度
//第一个参数反应了检测的频率
[moviePlayeView.playeraddPeriodicTimeObserverForInterval:CMTimeMake(1, 1)queue:NULLusingBlock:^(CMTime time){
//获取当前时间
CMTime currentTime = moviePlayeView.player.currentItem.currentTime;
//转成秒数
CGFloat currentPlayTime = (CGFloat)currentTime.value/currentTime.timescale;
movieProgressSlider.value = currentPlayTime/totalMovieDuration;
//用label显示当前播放的秒数
//判断秒数是否满一分钟,如果不满一分钟显示秒,如果满一分钟，显示分钟
currentTimeLabel.text = [self convertMovieTimeToText:currentPlayTime];
//NSLog(@"currentTimeLabel.text:%@",currentTimeLabel.text);
}];
}
-(void)moviePlayDidEnd:(NSNotification*)notification{
//视频播放完成，回退到视频列表页面
[self doneClick:nil];
}
-(IBAction)doneClick:(id)sender{
//停止播放，不然页面dimiss了以后，还有播放的声音
[moviePlayeView.playerpause];
[selfdismissModalViewControllerAnimated:YES];
}
-(IBAction)playClick:(id)sender{
//播放暂停控制，进入页面就开始播放视频，然后播放按钮的文字是暂停
//点击一下播放视频停止，按钮文字变成播放
//判断是播放还是暂停状态
if ([[playButtontitleForState:UIControlStateNormal]isEqualToString:@"暂停"]) {
//从播放状态进入暂停
[moviePlayeView.playerpause];
[playButtonsetTitle:@"播放"forState:UIControlStateNormal];
}else{
//从暂停状态进入播放
[moviePlayeView.playerplay];
[playButtonsetTitle:@"暂停"forState:UIControlStateNormal];
}
}
-(IBAction)movieProgressDragged:(id)sender{
//拖动改变视频播放进度
//计算出拖动的当前秒数
NSInteger dragedSeconds = floorf(totalMovieDuration*movieProgressSlider.value);
NSLog(@"dragedSeconds:%d",dragedSeconds);
//转换成CMTime才能给player来控制播放进度
CMTime dragedCMTime = CMTimeMake(dragedSeconds, 1);
[moviePlayeView.playerpause];
[moviePlayeView.player seekToTime:dragedCMTime completionHandler:^(BOOL finish){
[moviePlayeView.playerplay];
}];
}
//长按手势
-(void)initMoviewPreview{
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizeralloc]initWithTarget:selfaction:@selector(progessSliderLongPress:)];
[movieProgressSlideraddGestureRecognizer:longPress];
[longPress release];
}
-(void)progessSliderLongPress:(UILongPressGestureRecognizer*)theLong{
//因为长按手势的方法最少会被调用两次，所以为了不重复弹出popOver进行判断，只调用一次弹出popOver
if (theLong.state==UIGestureRecognizerStateBegan) {
//长按以后弹出popView在长按的位置
CGPoint touchPoint = [theLong locationInView:self.view];
//只能显示在进度条上方
CGRect popOverFrame = CGRectMake(touchPoint.x-100, movieProgressSlider.frame.origin.y, 200, 150);
UIViewController *previewMovieController = [[UIViewController alloc]init];
//通过长按手势在slider的位置，计算视频预览的时间
CGPoint touchPointInSlider = [theLong locationInView:movieProgressSlider];
CustomPlayerView *previewView = [self previewViewCreate:touchPointInSlider.x];
previewMovieController.view.backgroundColor = [UIColor whiteColor];
previewMovieController.view = previewView;
UIPopoverController *popoverController = [[UIPopoverControlleralloc]initWithContentViewController:previewMovieController];
//更改popover的contentSize
popoverController.delegate = self;
popoverController.popoverContentSize = CGSizeMake(200, 150);
//箭头向下，指向进度条
[popoverController presentPopoverFromRect:popOverFrameinView:self.viewpermittedArrowDirections:UIPopoverArrowDirectionDownanimated:YES];
//播放视频
[previewView.player play];
[previewMovieController release];
//不能在这里使用release和autorelease，因为popOver正在使用，release会导致crash
//[popoverController release];
}
}
//为了使调用视频预览的代码更清晰，把创建playerView的代码和创建popover的分开
-(CustomPlayerView*)previewViewCreate:(CGFloat)xOffsetInSlider{
// NSLog(@"touchPoint:%@,touchPointInSlider:%@",NSStringFromCGPoint(touchPoint),NSStringFromCGPoint(touchPointInSlider));
//把touchPointInSlider。x除以slider的宽度可以计算出预览的进度
CGFloat previewValue = xOffsetInSlider/movieProgressSlider.bounds.size.width;
//如果长按在进度条的中间，那么previewValue就是0。5，乘以视频的总时间，就知道了视频预览的时间
NSInteger previewSeconds = floorf(previewValue*totalMovieDuration);
//秒数舍弃小数部分，转换成cmTime
CMTime previewCMTime = CMTimeMake(previewSeconds, 1);
//初始化视频预览的view
CustomPlayerView *previewView = [[CustomPlayerView alloc]initWithFrame:CGRectMake(0, 0, 200, 150)];
AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:movieURL];
//跳到视频预览的时间
[playerItem seekToTime:previewCMTime];
//player是视频播放的控制器，可以用来快进播放，暂停等
AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem];
[previewView setPlayer:player];
return [previewView autorelease];
}
- (void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController{
//popOver已经使用完毕，release是可以的
[popoverController release];
}
@end
