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iOS中关于流媒体的简介:介于下载本地播放与实时流媒体之间的一种播放形式,下载本地播放必须全部将文件下载完成后才能播放,而渐进式下载不必等到全部下载完成后再播放,它可以一边下载一边播放,在完成播放内容之后,整个文件会保存在手机上。
实时流媒体
实时流媒体是一边接收数据包一边播放,本地不保留文件副本,实时流式传输总是实时传送,可以实时实况转播,支持随机访问,用户可以快进或者快退以观看前面或后面的内容。实时流媒体传输必须保证数据包的传输速度大于文件的播放速度,否则用户看到的视频会出现暂停。当网络堵塞情况下视频质量会下降,所以要想保证视频的质量渐进式下载会更好一些。
下面是本人亲测的流媒体播放和下载教程:
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1.界面搭建(如图)
2.用到的第三方助手类(需要的可以微博互动或私信我)每日更新关注:http://weibo.com/hanjunqiang 新浪微博
下载地址:http://pan.baidu.com/s/1hrvqXA8
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3.开始项目-头文件及相关宏
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LO_ViewController.h
#import <UIKit/UIKit.h> #import <MediaPlayer/MediaPlayer.h> #import "M3U8Handler.h" #import "VideoDownloader.h" #import "HTTPServer.h" @interface LO_ViewController : UIViewController<M3U8HandlerDelegate,VideoDownloadDelegate> @property (nonatomic, strong)HTTPServer * httpServer; @property (nonatomic, strong)VideoDownloader *downloader; @end
LO_ViewController.m
#import "LO_ViewController.h" @interface LO_ViewController () @property (weak, nonatomic) IBOutlet UIProgressView *progressView; @property (weak, nonatomic) IBOutlet UILabel *progressLabel; @property (weak, nonatomic) IBOutlet UIButton *downloadButton; @property (weak, nonatomic) IBOutlet UIButton *clearButton; @end @implementation LO_ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. //打开本地服务器 [self openHttpServer]; if ([[[NSUserDefaults standardUserDefaults] objectForKey:@"isDownload"] boolValue]) { [self.downloadButton setTitle:@"已完成" forState:UIControlStateNormal]; self.downloadButton.enabled = NO; self.clearButton.enabled = YES; M3U8Handler *handler = [[M3U8Handler alloc] init]; [handler praseUrl:[NSString stringWithFormat:@"http://v.youku.com/player/getM3U8/vid/XNjUxMTE4NDAw/type/mp4"]]; handler.playlist.uuid = @"XNjUxMTE4NDAw"; self.downloader = [[VideoDownloader alloc]initWithM3U8List:handler.playlist]; [self.downloader addObserver:self forKeyPath:@"clearCaches" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:nil]; // 判断是否清理缓存 } }
- (void)openHttpServer { self.httpServer = [[HTTPServer alloc] init]; [self.httpServer setType:@"_http._tcp."]; // 设置服务类型 [self.httpServer setPort:12345]; // 设置服务器端口 // 获取本地Library/Cache路径下downloads路径 NSString *webPath = [kLibraryCache stringByAppendingPathComponent:kPathDownload]; NSLog(@"-------------\nSetting document root: %@\n", webPath); // 设置服务器路径 [self.httpServer setDocumentRoot:webPath]; NSError *error; if(![self.httpServer start:&error]) { NSLog(@"-------------\nError starting HTTP Server: %@\n", error); } }
#pragma mark - 清理缓存 - (IBAction)clearCaches:(id)sender { [self.downloader cleanDownloadFiles]; }
- (IBAction)playStreamingMedia:(id)sender { // 优酷视频m3u8新地址格式如下:http://pl.youku.com/playlist/m3u8?vid=XNjUxMTE4NDAw&type=mp4 // 如果上面的链接不可用,那么使用这个链接http://v.youku.com/player/getM3U8/vid/XNjUxMTE4NDAw/type/mp4,如果两个连接都不可以用的话,那么很大可能是优酷的服务器挂掉了 // 如果上面的两种格式都不行的话,考虑用这个格式,当然如果这个格式不行的话,是上面的,或者直接换个对应的m3u8的地址 http://pl.youku.com/playlist/m3u8?vid=162779600&ts=1407469897&ctype=12&token=3357&keyframe=1&sid=640746989782612d6cc70&ev=1&type=mp4&ep=dCaUHU2LX8YJ4ivdjj8bMyqxJ3APXP8M9BiCiNRiANQnS%2B24&oip=2043219268 NSURL *url = [[NSURL alloc] initWithString:@"http://pl.youku.com/playlist/m3u8?vid=162779600&ts=1407469897&ctype=12&token=3357&keyframe=1&sid=640746989782612d6cc70&ev=1&type=flv&ep=dCaUHU2LX8YJ4ivdjj8bMyqxJ3APXP8M9BiCiNRiANQnS%2B24&oip=2043219268"]; MPMoviePlayerViewController *player = [[MPMoviePlayerViewController alloc] initWithContentURL:url]; [self presentMoviePlayerViewControllerAnimated:player]; }每日更新关注:http://weibo.com/hanjunqiang 新浪微博
- (IBAction)downloadStreamingMedia:(id)sender { UIButton *downloadButton = sender; // 获取本地Library/Cache路径 NSString *localDownloadsPath = [kLibraryCache stringByAppendingPathComponent:kPathDownload]; // 获取视频本地路径 NSString *filePath = [localDownloadsPath stringByAppendingPathComponent:@"XNjUxMTE4NDAw/movie.m3u8"]; NSFileManager *fileManager = [NSFileManager defaultManager]; // 判断视频是否缓存完成,如果完成则播放本地缓存 if ([fileManager fileExistsAtPath:filePath]) { [downloadButton setTitle:@"已完成" forState:UIControlStateNormal]; downloadButton.enabled = NO; }else{ M3U8Handler *handler = [[M3U8Handler alloc] init]; handler.delegate = self; // 解析m3u8视频地址 [handler praseUrl:@"http://pl.youku.com/playlist/m3u8?vid=162779600&ts=1407469897&ctype=12&token=3357&keyframe=1&sid=640746989782612d6cc70&ev=1&type=flv&ep=dCaUHU2LX8YJ4ivdjj8bMyqxJ3APXP8M9BiCiNRiANQnS%2B24&oip=2043219268"]; // 开启网络指示器 [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES]; } }
- (IBAction)playVideoFromLocal:(id)sender { NSString * playurl = [NSString stringWithFormat:@"http://127.0.0.1:12345/XNjUxMTE4NDAw/movie.m3u8"]; NSLog(@"本地视频地址-----%@", playurl); // 获取本地Library/Cache路径 NSString *localDownloadsPath = [kLibraryCache stringByAppendingPathComponent:kPathDownload]; // 获取视频本地路径 NSString *filePath = [localDownloadsPath stringByAppendingPathComponent:@"XNjUxMTE4NDAw/movie.m3u8"]; NSFileManager *fileManager = [NSFileManager defaultManager]; // 判断视频是否缓存完成,如果完成则播放本地缓存 if ([fileManager fileExistsAtPath:filePath]) { MPMoviePlayerViewController *playerViewController =[[MPMoviePlayerViewController alloc]initWithContentURL:[NSURL URLWithString: playurl]]; [self presentMoviePlayerViewControllerAnimated:playerViewController]; } else{ UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Sorry" message:@"当前视频未缓存" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]; [alertView show]; } } #pragma mark - #pragma mark - 视频解析完成 -(void)praseM3U8Finished:(M3U8Handler*)handler { handler.playlist.uuid = @"XNjUxMTE4NDAw"; self.downloader = [[VideoDownloader alloc]initWithM3U8List:handler.playlist]; [self.downloader addObserver:self forKeyPath:@"currentProgress" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:nil]; // 设置观察者用来得到当前下载的进度 [self.downloader addObserver:self forKeyPath:@"clearCaches" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:nil]; // 判断是否清理缓存 self.downloader.delegate = self; [self.downloader startDownloadVideo]; // 开始下载 }每日更新关注:http://weibo.com/hanjunqiang 新浪微博
#pragma mark - 通过观察者监控下载进度显示/缓存清理
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if ([keyPath isEqualToString:@"clearCaches"]) { self.downloadButton.enabled = YES; [self.downloadButton setTitle:@"下载" forState:UIControlStateNormal]; self.clearButton.enabled = NO; [[NSUserDefaults standardUserDefaults] setObject:[NSNumber numberWithBool:NO] forKey:@"isDownload"]; [[NSUserDefaults standardUserDefaults] synchronize]; self.progressView.progress = 0.0; self.progressLabel.text = [NSString stringWithFormat:@"%.2f%%", 0.0]; }else{ self.progressLabel.text = [NSString stringWithFormat:@"%.2f%%", 100 * [[change objectForKey:@"new"] floatValue]]; self.progressView.progress = [[change objectForKey:@"new"] floatValue]; if (self.progressView.progress == 1) { [[NSUserDefaults standardUserDefaults] setObject:[NSNumber numberWithBool:YES] forKey:@"isDownload"]; [self.downloadButton setTitle:@"已完成" forState:UIControlStateNormal]; [[NSUserDefaults standardUserDefaults] synchronize]; self.clearButton.enabled = YES; self.downloadButton.enabled = NO; } } }每日更新关注:http://weibo.com/hanjunqiang 新浪微博
#pragma mark - 视频解析失败 -(void)praseM3U8Failed:(M3U8Handler*)handler { NSLog(@"视频解析失败-failed -- %@",handler); UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"噢,NO~标签:
原文地址:http://blog.csdn.net/qq_31810357/article/details/50574914