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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:
每日更新关注:http://weibo.com/hanjunqiang 新浪微博
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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
每日更新关注:http://weibo.com/hanjunqiang 新浪微博
3.开始项目-头文件及相关宏
每日更新关注:http://weibo.com/hanjunqiang 新浪微博
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
- }
- }
#pragma mark - 打开本地服务器
- - (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];
- }
#pragma mark - 在线流媒体播放
- - (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];
- }
#pragma mark - 视频下载
- - (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];
- }
- }
#pragma mark - 播放本地缓存视频
- - (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 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
- }
#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:(voidvoid *)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%%", 1100 * [[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;
- }
- }
- }
- #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~
原文地址:http://blog.csdn.net/qq_31810357/article/details/50574914