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 [AVPlayerLayerclass];

　　}

　　-(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

//

// Created by 刘 大兵 on 12-5-17.

// Copyright (c) 2012年 中华中等专业学校. All rights reserved.

//

#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.viewaddSubview:loadingView];

[selfinitPlayer];

[selfmonitorMovieProgress];

[selfinitMoviewPreview];

}

- (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

[loadingViewshow: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.playerplay];

//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