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  3. iOS音视频

iOS音视频

xiaoxiao2021-02-28  49

1.播放音效

#import "ViewController.h" #import <AVFoundation/AVFoundation.h> //播放音频需要用到的框架 @interface ViewController () @property (nonatomic, assign) SystemSoundID soundID; @end @implementation ViewController //音效 //又称“短音频”，通常在程序中的播放时长为1~2秒 //在应用程序中起到点缀效果，提升整体用户体验 - (void)playSound{ // 1.获得音效文件的全路径 NSURL *url = [[NSBundle mainBundle] URLForResource:@"buyao.wav" withExtension:nil]; // 2.加载音效文件, 创建音效ID（SoundID） AudioServicesCreateSystemSoundID((__bridge CFURLRef)url, &_soundID); // 3.播放音效 AudioServicesPlaySystemSound(_soundID); } @end

音视频之mp3播放

1.创建播放控件

2.代码

#import "ViewController.h" #import <AVFoundation/AVFoundation.h> @interface ViewController () @property (nonatomic, strong) AVAudioPlayer *audioPlayer; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; //在AppDelegate - application: didFinishLaunchingWithOptions:必须设置,否则真机测试没有声音 // [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil]; // 1.加载本地的音乐文件 NSURL *url = [[NSBundle mainBundle] URLForResource:@"西游记.mp3" withExtension:nil]; // 2. 创建音乐播放对象 self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; // 3.准备播放 (音乐播放的内存空间的开辟等功能) 不写这行代码直接播放也会默认调用prepareToPlay [self.audioPlayer prepareToPlay]; } // 播放 - (IBAction)playMusic{ [self.audioPlayer play]; } // 暂停 - (IBAction)pause{ [self.audioPlayer pause]; } // 停止 - (IBAction)stop{ // 停止的效果和暂停是相同 [self.audioPlayer stop]; } @end

2.播放音乐

类方法不能访问成员属性,只能访问 static NSMutableDictionary *_musicPlayers; 静态变量

ZYXAudioTool.h

#import <Foundation/Foundation.h> @interface ZYXAudioTool : NSObject /** * 播放音效 * * @param filename 音效的文件名 */ + (void)playSound:(NSString *)filename; /** * 销毁音效 * * @param filename 音效的文件名 */ + (void)disposeSound:(NSString *)filename; /** * 播放音乐 * * @param filename 音乐的文件名 */ + (BOOL)playMusic:(NSString *)filename; /** * 暂停音乐 * * @param filename 音乐的文件名 */ + (void)pauseMusic:(NSString *)filename; /** * 停止音乐 * * @param filename 音乐的文件名 */ + (void)stopMusic:(NSString *)filename; @end

ZYXAudioTool.m

#import "ZYXAudioTool.h" #import <AVFoundation/AVFoundation.h> @implementation ZYXAudioTool #pragma mark - 存放所有的音效ID static NSMutableDictionary *_soundIDs; + (NSMutableDictionary *)soundIDs { if (!_soundIDs) { _soundIDs = [NSMutableDictionary dictionary]; } return _soundIDs; } #pragma mark - 播放音效 @param filename 音效的文件名 + (void)playSound:(NSString *)filename { if (!filename) return; // 1.取出对应的音效ID SystemSoundID soundID = [[self soundIDs][filename] intValue]; // 2.初始化 音效文件只需要加载1次 if (!soundID) { // 1.音频文件的URL NSURL *url = [[NSBundle mainBundle] URLForResource:filename withExtension:nil]; if (!url) return; // 2.加载音效文件，得到对应的音效ID AudioServicesCreateSystemSoundID((__bridge CFURLRef)(url), &soundID); // 存入字典 [self soundIDs][filename] = @(soundID); } // 3.播放 AudioServicesPlaySystemSound(soundID); } #pragma mark - 销毁音效 @param filename 音效的文件名 + (void)disposeSound:(NSString *)filename { if (!filename) return; // 1.取出对应的音效ID SystemSoundID soundID = [[self soundIDs][filename] intValue]; // 2.销毁 if (soundID) { // 释放音效资源 AudioServicesDisposeSystemSoundID(soundID); [[self soundIDs] removeObjectForKey:filename]; } } #pragma mark - 存放所有的音乐播放器 static NSMutableDictionary *_musicPlayers; + (NSMutableDictionary *)musicPlayers { if (!_musicPlayers) { _musicPlayers = [NSMutableDictionary dictionary]; } return _musicPlayers; } #pragma mark - 播放音乐 @param filename 音乐的文件名 + (BOOL)playMusic:(NSString *)filename { if (!filename) return NO; // 1.取出对应的播放器 AVAudioPlayer *player = [self musicPlayers][filename]; // 2.播放器没有创建，进行初始化 if (!player) { // 音频文件的URL NSURL *url = [[NSBundle mainBundle] URLForResource:filename withExtension:nil]; if (!url) return NO; // 创建播放器(一个AVAudioPlayer只能播放一个URL) player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; // 缓冲 if (![player prepareToPlay]) return NO; // 存入字典 [self musicPlayers][filename] = player; } // 3.播放 if (!player.isPlaying) { return [player play]; } // 正在播放 return YES; } #pragma mark - 暂停音乐 @param filename 音乐的文件名 + (void)pauseMusic:(NSString *)filename { if (!filename) return; // 1.取出对应的播放器 AVAudioPlayer *player = [self musicPlayers][filename]; // 2.暂停 if (player.isPlaying) { [player pause]; } } #pragma mark - 停止音乐 @param filename 音乐的文件名 + (void)stopMusic:(NSString *)filename { if (!filename) return; // 1.取出对应的播放器 AVAudioPlayer *player = [self musicPlayers][filename]; // 2.停止 [player stop]; // 3.将播放器从字典中移除 [[self musicPlayers] removeObjectForKey:filename]; } @end

ViewController.m

#import "ViewController.h" #import "ZYXAudioTool.h" @interface ViewController () - (IBAction)play; - (IBAction)pause; - (IBAction)stop; - (IBAction)next; @property (nonatomic, strong) NSArray *songs; @property (nonatomic, assign) int currentIndex; @end @implementation ViewController - (NSArray *)songs{ if (!_songs) { self.songs = @[@"120125029.mp3", @"309769.mp3", @"235319.mp3"]; } return _songs; } - (IBAction)play { [ZYXAudioTool playMusic:self.songs[self.currentIndex]]; } - (IBAction)pause { [ZYXAudioTool pauseMusic:self.songs[self.currentIndex]]; } - (IBAction)stop { [ZYXAudioTool stopMusic:self.songs[self.currentIndex]]; } - (IBAction)next { [self stop]; self.currentIndex++; if (self.currentIndex >= self.songs.count) { self.currentIndex = 0; } [self play]; } - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ [ZYXAudioTool playSound:@"buyao.wav"]; } @end 1-项目中的音效和音乐文件.png

3.本地和网络流媒体音频视频播放

AVPlayer 播放本地/网络 音频 视频MPMoviePlayerController 播放本地/网络 音频 视频MPMoviePlayerViewController 播放本地/网络 音频 视频

ViewController.m

#import "ViewController.h" #import <MediaPlayer/MediaPlayer.h> #import <AVFoundation/AVFoundation.h> @interface ViewController () @property (nonatomic, strong) MPMoviePlayerController *mpc; @property (nonatomic, strong) AVPlayer *player; @end @implementation ViewController - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [self networkVideo]; } -(void)viewDidLoad { [super viewDidLoad]; [self avPlayer]; [self moviePlayerController]; } - (void)avPlayer{ NSURL *url = nil; #pragma mark - local url = [[NSBundle mainBundle] URLForResource:@"minion_01.mp4" withExtension:nil]; #pragma mark - network url = [NSURL URLWithString:@"http://localhost/videos/235319.mp3"]; url = [NSURL URLWithString:@"http://localhost/videos/minion_15.mp4"]; // 创建播放器 AVPlayer *player = [AVPlayer playerWithURL:url]; [player play]; // 创建播放器图层 AVPlayerLayer *layer = [AVPlayerLayer layer]; layer.player = player; layer.frame = CGRectMake(10, 20, 300, 200); // 添加图层到控制器的view [self.view.layer addSublayer:layer]; } - (void)moviePlayerController{ // 创建播放器对象 MPMoviePlayerController *mpc = [[MPMoviePlayerController alloc] init]; #pragma mark - local mpc.contentURL = [[NSBundle mainBundle] URLForResource:@"minion_01.mp4" withExtension:nil]; #pragma mark - network mpc.contentURL = [NSURL URLWithString:@"http://localhost/videos/235319.mp3"]; mpc.contentURL = [NSURL URLWithString:@"http://localhost/videos/minion_15.mp4"]; // 添加播放器界面到控制器的view上面 mpc.view.frame = CGRectMake(10, self.view.frame.size.height-240, 300, 200); [self.view addSubview:mpc.view]; UIView *controlView = [[UIView alloc] init]; controlView.backgroundColor = [UIColor redColor]; controlView.frame = CGRectMake(0, 0, 300, 50); [mpc.view addSubview:controlView]; // 隐藏自动自带的控制面板 mpc.controlStyle = MPMovieControlStyleNone; // 监听播放器 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieStateDidChange) name:MPMoviePlayerPlaybackStateDidChangeNotification object:mpc]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieDidFinish) name:MPMoviePlayerPlaybackDidFinishNotification object:mpc]; [mpc play]; self.mpc = mpc; } - (void)dealloc{ [[NSNotificationCenter defaultCenter] removeObserver:self]; } - (void)movieStateDidChange{ NSLog(@"----播放状态--%ld", (long)self.mpc.playbackState); } - (void)movieDidFinish{ NSLog(@"----播放完毕"); } // ----播放状态--1 // ----播放状态--2 // ----播放完毕 #pragma mark - network - (void)networkVideo{ // MPMoviePlayerViewController继承自UIViewController，它内部封装了一个MPMoviePlayerController // MPMoviePlayerViewController只能全屏播放 // NSURL *url = [NSURL URLWithString:@"http://streams.videolan.org/streams/mp4/Mr_MrsSmith-h264_aac.mp4"]; NSURL *url = [NSURL URLWithString:@"http://localhost/videos/minion_01.mp4"]; MPMoviePlayerViewController *mpvc = [[MPMoviePlayerViewController alloc] initWithContentURL:url]; [self presentMoviePlayerViewControllerAnimated:mpvc]; } @end 2-AVPlayer-MPMoviePlayerController-MPMoviePlayerViewController.png

4.VLC框架本地和网络流媒体音频视频播放

ViewController.m

#import "ViewController.h" #import <MobileVLCKit/MobileVLCKit.h> @interface ViewController () @property (nonatomic, strong) VLCMediaPlayer *player; @end @implementation ViewController - (void)vlcPlayer{ self.player = [[VLCMediaPlayer alloc] init]; // 设置需要播放的多媒体文件 // @"http://streams.videolan.org/streams/mp4/Mr_MrsSmith-h264_aac.mp4" // @"http://y1.eoews.com/assets/ringtones/2012/5/18/34045/hi4dwfmrxm2citwjcc5841z3tiqaeeoczhbtfoex.mp3" NSURL *url = nil; #pragma mark - local url = [[NSBundle mainBundle] URLForResource:@"minion_01.mp4" withExtension:nil]; #pragma mark - network url = [NSURL URLWithString:@"http://localhost/videos/235319.mp3"]; url = [NSURL URLWithString:@"http://localhost/videos/minion_15.mp4"]; self.player.media = [VLCMedia mediaWithURL:url]; // 设置播放界面的载体 self.player.drawable = self.view; // 播放 [self.player play]; } @end

5.AVAudioRecorder录音

ViewController.m

#import "ViewController.h" #import <AVFoundation/AVFoundation.h> @interface ViewController () - (IBAction)startRecord; - (IBAction)stopRecord; @property (nonatomic, strong) AVAudioRecorder *recorder; @property (nonatomic, strong) CADisplayLink *link; @property (nonatomic, assign) double slientDuration; @end @implementation ViewController - (CADisplayLink *)link { if (!_link) { self.link = [CADisplayLink displayLinkWithTarget:self selector:@selector(update)]; } return _link; } - (void)update { // 1.更新录音器的测量值 [self.recorder updateMeters]; // 2.获得平均分贝 float power = [self.recorder averagePowerForChannel:0]; // 3.如果小于-30, 开始静音 if (power < -30) { if ([self.recorder isRecording]) { [self.recorder pause]; } self.slientDuration += self.link.duration; if (self.slientDuration >= 2) { // 沉默至少2秒钟 [self.recorder stop]; // 停止定时器 [self.link invalidate]; self.link = nil; NSLog(@"--------停止录音"); } } else { if (![self.recorder isRecording]) { [self.recorder record]; } self.slientDuration = 0; NSLog(@"**********持续说话"); } } - (IBAction)startRecord { NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"zyx.caf"]; NSLog(@"path = %@",path); NSURL *url = [NSURL fileURLWithPath:path]; // 1.创建录音器 NSMutableDictionary *setting = [NSMutableDictionary dictionary]; // 音频格式 setting[AVFormatIDKey] = @(kAudioFormatAppleIMA4); // 音频采样率 setting[AVSampleRateKey] = @(8000.0); // 音频通道数 setting[AVNumberOfChannelsKey] = @(1); // 线性音频的位深度 setting[AVLinearPCMBitDepthKey] = @(8); AVAudioRecorder *recorder = [[AVAudioRecorder alloc] initWithURL:url settings:setting error:nil]; // 允许测量分贝 recorder.meteringEnabled = YES; // 2.缓冲 [recorder prepareToRecord]; // 3.录音 [recorder record]; self.recorder = recorder; // 4.开启定时器 self.slientDuration = 0; [self.link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode]; } - (IBAction)stopRecord { [self.recorder stop]; } @end

6.录音和播放代理

AVAudioRecorderDelegate AVAudioPlayerDelegate

ViewController.m

#import "ViewController.h" #import <AVFoundation/AVFoundation.h> #define kMoniterFile @"monitor.caf" #define kRecorderFile @"recorder.caf" #define kRecorderPower -25.0 @interface ViewController () <AVAudioRecorderDelegate, AVAudioPlayerDelegate> { AVAudioRecorder *_monitor; // 监听器 AVAudioRecorder *_recorder; // 录音机 AVAudioPlayer *_player; // 播放器 NSTimer *_timer; // 时钟 NSTimeInterval _silenceDuration; // 累计静音时长 NSDate *_lastRecorderTime; // 末次录音时间 } @end @implementation ViewController #pragma mark - 私有方法 #pragma mark - 录音设置 - (NSDictionary *)recorderSettings{ NSMutableDictionary *setting = [[NSMutableDictionary alloc] init]; // 音频格式 [setting setValue:[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey]; // 音频采样率 [setting setValue:[NSNumber numberWithFloat:8000.0] forKey:AVSampleRateKey]; // 音频通道数 [setting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey]; // 线性音频的位深度 [setting setValue:[NSNumber numberWithInt:8] forKey:AVLinearPCMBitDepthKey]; return setting; } #pragma mark - 创建URL - (NSURL *)urlWithFileName:(NSString *)fileName{ NSArray *docs = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *path = [docs[0] stringByAppendingPathComponent:fileName]; NSLog(@"path = %@",path); return [NSURL fileURLWithPath:path]; } #pragma mark - 实例化录音机 - (AVAudioRecorder *)recorderWithFileName:(NSString *)fileName{ // 1. 建立URL NSURL *url = [self urlWithFileName:fileName]; // 2. 实例化录音机 NSError *error = nil; AVAudioRecorder *recorder = [[AVAudioRecorder alloc] initWithURL:url settings:[self recorderSettings] error:&error]; if (error) { NSLog(@"实例化录音机出错 - %@", error.localizedDescription); return nil; } // 3. 准备录音 [recorder prepareToRecord]; return recorder; } #pragma mark - 实例化播放器 - (AVAudioPlayer *)playerWithFileName:(NSString *)fileName{ // 1. 建立URL NSURL *url = [self urlWithFileName:fileName]; // 2. 实例化播放器 NSError *error = nil; AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error]; if (error) { NSLog(@"实例化播放器出错 - %@", error.localizedDescription); return nil; } // 3. 准备播放 [player prepareToPlay]; return player; } #pragma mark - 启动时钟 - (void)startTimer{ NSLog(@"启动时钟"); _timer = [NSTimer scheduledTimerWithTimeInterval:0.1f target:self selector:@selector(timerFired:) userInfo:nil repeats:YES]; } #pragma mark - 设置录音机 - (void)setupRecorders{ // 1. 监听器 _monitor = [self recorderWithFileName:kMoniterFile]; // 1.1 设置音量监听 [_monitor setMeteringEnabled:YES]; // 2. 录音机 _recorder = [self recorderWithFileName:kRecorderFile]; // 2.1 设置代理，监听录音完成事件 [_recorder setDelegate:self]; // 3. 启动监听器 [_monitor record]; // 4. 时钟随时检测监听器的数值 [self startTimer]; } #pragma mark - 时钟触发方法 - (void)timerFired:(NSTimer *)timer{ // 1. 更新监听器的数值 [_monitor updateMeters]; // 2. 取出监听器第一个声道的音量 CGFloat power = [_monitor averagePowerForChannel:0]; // 3. 判断音量大小 if (power > kRecorderPower) { // 要录音，首先判断录音机是否处于录音状态 if (![_recorder isRecording]) { NSLog(@"启动录音"); // 启动录音机 [_recorder record]; } // 使用当前系统时间，作为末次录音时间 _lastRecorderTime = [NSDate date]; } else if ([_recorder isRecording]){ NSLog(@"出现静音..."); // 累计静音时间，如果过长，停止录音 if (_silenceDuration > 1.0f) { NSLog(@"停止录音，准备播放"); // 停止录音 [_recorder stop]; } else { NSLog(@"累加静音时长..."); // 累加静音时间 _silenceDuration += [[timer fireDate] timeIntervalSinceDate:_lastRecorderTime]; } } // 4. 如果总静音时长超过一定时间，重新启动监听器 if (_silenceDuration > 10.0f) { [_monitor stop]; [_monitor record]; } } #pragma mark 播放录音 - (void)startPlaying{ // 1. 实例化播放器 _player = [self playerWithFileName:kRecorderFile]; // 2. 设置播放器属性 [_player setNumberOfLoops:0]; [_player setDelegate:self]; // 3. 设置播放速度 [_player setEnableRate:YES]; [_player setRate:1.2f]; // 4. 开始播放 [_player play]; } #pragma mark - 代理方法 #pragma mark - 录音完成 - (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{ // 1. 停止监听器 [_monitor stop]; // 2. 停止时钟 [_timer invalidate]; _timer = nil; // 3. 播放录音 [self startPlaying]; } #pragma mark 播放完成 - (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{ // 1. 重新启动监听器 [_monitor record]; // 2. 启动时钟 [self startTimer]; } - (void)viewDidLoad { [super viewDidLoad]; [self setupRecorders]; } @end 作者：solozyx 链接：https://www.jianshu.com/p/7e6c303e9187 來源：简书 著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。
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