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推流用的是一个第三方的IFLiveKit框架。这个框架基于rtmp协议的，c语言和oc语言分开的非常清楚，对oc语言非常友好，使用起来相对简单。
IFLiveKit内部集成了GPUIImage。内部实现了图片渲染等美艳效果。减少了开发时候美艳效果的调试。
需求：创建一个简单的推流页面。包含功能有：1.推流状态监听。2.切换摄像头。3.切换美艳效果。4.开关推流。
一.推流之前需要检查摄像头和麦克风等权限是否开启，并启动摄像头，核心代码如下：
//判断是否有摄像头 if(![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){ [self showInfo:@"您的设备没有摄像头或者相关的驱动, 不能进行直播"]; return; } //判断是否有摄像头权限 AVAuthorizationStatus authorizationStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo]; if (authorizationStatus == AVAuthorizationStatusRestricted|| authorizationStatus == AVAuthorizationStatusDenied) { [self showInfo:@"app需要访问您的摄像头。\n请启用摄像头-设置/隐私/摄像头"]; return ; } AVAudioSession *audioSession = [AVAudioSession sharedInstance]; if ([audioSession respondsToSelector:@selector(requestRecordPermission:)]) { [audioSession performSelector:@selector(requestRecordPermission:) withObject:^(BOOL granted) { if (granted) { return YES; } else { [self showInfo:@"app需要访问您的麦克风。\n请启用麦克风-设置/隐私/麦克风"]; return NO; } }]; }
二.创建一个按钮.点击开始推流代码如下：
- (LFLiveSession*)session{ if(!_session){ /*** 默认分辨率368 ＊ 640 音频：44.1 iphone6以上48 双声道 方向竖屏 ***/ _session = [[LFLiveSession alloc] initWithAudioConfiguration:[LFLiveAudioConfiguration defaultConfiguration] videoConfiguration:[LFLiveVideoConfiguration defaultConfigurationForQuality:LFLiveVideoQuality_Medium2]]; /** 自己定制高质量音频128K 分辨率设置为720*1280 方向竖屏 */ /* LFLiveAudioConfiguration *audioConfiguration = [LFLiveAudioConfiguration new]; audioConfiguration.numberOfChannels = 2; audioConfiguration.audioBitrate = LFLiveAudioBitRate_128Kbps; audioConfiguration.audioSampleRate = LFLiveAudioSampleRate_44100Hz; LFLiveVideoConfiguration *videoConfiguration = [LFLiveVideoConfiguration new]; videoConfiguration.videoSize = CGSizeMake(720, 1280); videoConfiguration.videoBitRate = 800*1024; videoConfiguration.videoMaxBitRate = 1000*1024; videoConfiguration.videoMinBitRate = 500*1024; videoConfiguration.videoFrameRate = 15; videoConfiguration.videoMaxKeyframeInterval = 30; videoConfiguration.orientation = UIInterfaceOrientationPortrait; videoConfiguration.sessionPreset = LFCaptureSessionPreset720x1280; _session = [[LFLiveSession alloc] initWithAudioConfiguration:audioConfiguration videoConfiguration:videoConfiguration liveType:LFLiveRTMP]; */ // 设置代理 _session.delegate = self; _session.running = YES; _session.preView = self.livingPreView; } return _session; } - (IBAction)startTouched:(id)sender { LFLiveStreamInfo *stream = [LFLiveStreamInfo new]; // 本地推流地址 stream.url = @"rtmp://192.168.199.131:1935/rtmplive/room"; self.rtmpUrl = stream.url; [self.session startLive:stream]; }
3.创建一个按钮点击关闭推流，代码如下
- (IBAction)endTouched:(id)sender { // 结束直播 [self.session stopLive]; self.stateLable.text = [NSString stringWithFormat:@"状态: 直播被关闭\nRTMP: %@", self.rtmpUrl]; }
4.创建一个按钮点击切换前后摄像头，代码如下
- (IBAction)camaBtnTouched:(id)sender { AVCaptureDevicePosition devicePositon = self.session.captureDevicePosition; self.session.captureDevicePosition = (devicePositon == AVCaptureDevicePositionBack) ? AVCaptureDevicePositionFront : AVCaptureDevicePositionBack; NSLog(@"切换前置/后置摄像头"); }
5.创建一个按钮设置美艳功能，代码如下
- (IBAction)beautiyBtnTouched:(id)sender { ((UIButton*)sender).selected = !((UIButton*)sender).selected; // 默认是开启了美颜功能的 self.session.beautyFace = !self.session.beautyFace; }
6.推流状态监听，接受代理，代码如下：
#pragma mark -- LFStreamingSessionDelegate /** live status changed will callback */ - (void)liveSession:(nullable LFLiveSession *)session liveStateDidChange:(LFLiveState)state{ NSString *tempStatus; switch (state) { case LFLiveReady: tempStatus = @"准备中"; break; case LFLivePending: tempStatus = @"连接中"; break; case LFLiveStart: tempStatus = @"已连接"; break; case LFLiveStop: tempStatus = @"已断开"; break; case LFLiveError: tempStatus = @"连接出错"; break; default: break; } self.stateLable.text = [NSString stringWithFormat:@"状态: %@\nRTMP: %@", tempStatus, self.rtmpUrl]; } /** live debug info callback */ - (void)liveSession:(nullable LFLiveSession *)session debugInfo:(nullable LFLiveDebug*)debugInfo{ } /** callback socket errorcode */ - (void)liveSession:(nullable LFLiveSession*)session errorCode:(LFLiveSocketErrorCode)errorCode{ }
6.自己也需要看到自己的推流画面，并观察美艳效果，代码如下：
- (UIView *)livingPreView { if (!_livingPreView) { UIView *livingPreView = [[UIView alloc] initWithFrame:self.view.bounds]; livingPreView.backgroundColor = [UIColor clearColor]; livingPreView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; [self.view insertSubview:livingPreView atIndex:0]; _livingPreView = livingPreView; } return _livingPreView; }
至此，完成了推流工作。
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原文地址：http://www.cnblogs.com/fusheng-it/p/5760271.html
