IOS直播理解章节三-直播推流实现(2)
原文地址:http://www.cnblogs.com/fusheng-it/p/5760271.html
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) {returnYES;
}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"];returnNO;
}
}];
}
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 = [LFLiveStreamInfonew];
//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：
#pragmamark -- LFStreamingSessionDelegate
/** live status changed will callback*/
- (void)liveSession:(nullable LFLiveSession *)session liveStateDidChange:(LFLiveState)state{
NSString*tempStatus;switch(state) {caseLFLiveReady:
tempStatus=@"准备中";break;caseLFLivePending:
tempStatus=@"连接中";break;caseLFLiveStart:
tempStatus=@"已连接";break;caseLFLiveStop:
tempStatus=@"已断开";break;caseLFLiveError:
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。
