6.6.4推流

我们使用LFLiveKit框架中的LFLiveSession进行推流。 LFLiveSession常用属性，如表6-2所示：

表6-2

实现步骤

1.引用头文件和LFLiveSessionDelegate代理

#import "LFLiveKit.h"

@interface PushFlowViewController ()<LFLiveSessionDelegate>

2.创建变量

@property (nonatomic, strong) LFLiveDebug *debugInfo;
@property (nonatomic, strong) LFLiveSession *session;

3.初始化session

_session = [[LFLiveSession alloc] initWithAudioConfiguration:[LFLiveAudioConfiguration defaultConfiguration] videoConfiguration:videoConfiguration captureType:LFLiveCaptureDefaultMask];
_session.delegate = self;
_session.showDebugInfo = NO;
_session.preView = self.view;

4.设置LFLiveVideoConfiguration

        /***   默认分辨率368 ＊ 640  音频：44.1 iphone6以上48  双声道  方向竖屏 ***/
        LFLiveVideoConfiguration *videoConfiguration = [LFLiveVideoConfiguration new];
        videoConfiguration.videoSize = CGSizeMake(360, 640);
        videoConfiguration.videoBitRate = 800*1024;
        videoConfiguration.videoMaxBitRate = 1000*1024;
        videoConfiguration.videoMinBitRate = 500*1024;
        videoConfiguration.videoFrameRate = 24;
        videoConfiguration.videoMaxKeyframeInterval = 48;
        videoConfiguration.outputImageOrientation = UIInterfaceOrientationPortrait;
        videoConfiguration.autorotate = NO;
        videoConfiguration.sessionPreset = LFCaptureSessionPreset720x1280;
        _session = [[LFLiveSession alloc] initWithAudioConfiguration:[LFLiveAudioConfiguration defaultConfiguration] videoConfiguration:videoConfiguration captureType:LFLiveCaptureDefaultMask];

        /**    自己定制单声道  */
        /*
         LFLiveAudioConfiguration *audioConfiguration = [LFLiveAudioConfiguration new];
         audioConfiguration.numberOfChannels = 1;
         audioConfiguration.audioBitrate = LFLiveAudioBitRate_64Kbps;
         audioConfiguration.audioSampleRate = LFLiveAudioSampleRate_44100Hz;
         _session = [[LFLiveSession alloc] initWithAudioConfiguration:audioConfiguration videoConfiguration:[LFLiveVideoConfiguration defaultConfiguration]];
         */

        /**    自己定制高质量音频96K */
        /*
         LFLiveAudioConfiguration *audioConfiguration = [LFLiveAudioConfiguration new];
         audioConfiguration.numberOfChannels = 2;
         audioConfiguration.audioBitrate = LFLiveAudioBitRate_96Kbps;
         audioConfiguration.audioSampleRate = LFLiveAudioSampleRate_44100Hz;
         _session = [[LFLiveSession alloc] initWithAudioConfiguration:audioConfiguration videoConfiguration:[LFLiveVideoConfiguration defaultConfiguration]];
         */

        /**    自己定制高质量音频96K 分辨率设置为540*960 方向竖屏 */

        /*
         LFLiveAudioConfiguration *audioConfiguration = [LFLiveAudioConfiguration new];
         audioConfiguration.numberOfChannels = 2;
         audioConfiguration.audioBitrate = LFLiveAudioBitRate_96Kbps;
         audioConfiguration.audioSampleRate = LFLiveAudioSampleRate_44100Hz;

         LFLiveVideoConfiguration *videoConfiguration = [LFLiveVideoConfiguration new];
         videoConfiguration.videoSize = CGSizeMake(540, 960);
         videoConfiguration.videoBitRate = 800*1024;
         videoConfiguration.videoMaxBitRate = 1000*1024;
         videoConfiguration.videoMinBitRate = 500*1024;
         videoConfiguration.videoFrameRate = 24;
         videoConfiguration.videoMaxKeyframeInterval = 48;
         videoConfiguration.orientation = UIInterfaceOrientationPortrait;
         videoConfiguration.sessionPreset = LFCaptureSessionPreset540x960;

         _session = [[LFLiveSession alloc] initWithAudioConfiguration:audioConfiguration videoConfiguration:videoConfiguration];
         */


        /**    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.landscape = NO;
         videoConfiguration.sessionPreset = LFCaptureSessionPreset360x640;

         _session = [[LFLiveSession alloc] initWithAudioConfiguration:audioConfiguration videoConfiguration:videoConfiguration];
         */


        /**    自己定制高质量音频128K 分辨率设置为720*1280 方向横屏  */

        /*
         LFLiveAudioConfiguration *audioConfiguration = [LFLiveAudioConfiguration new];
         audioConfiguration.numberOfChannels = 2;
         audioConfiguration.audioBitrate = LFLiveAudioBitRate_128Kbps;
         audioConfiguration.audioSampleRate = LFLiveAudioSampleRate_44100Hz;

         LFLiveVideoConfiguration *videoConfiguration = [LFLiveVideoConfiguration new];
         videoConfiguration.videoSize = CGSizeMake(1280, 720);
         videoConfiguration.videoBitRate = 800*1024;
         videoConfiguration.videoMaxBitRate = 1000*1024;
         videoConfiguration.videoMinBitRate = 500*1024;
         videoConfiguration.videoFrameRate = 15;
         videoConfiguration.videoMaxKeyframeInterval = 30;
         videoConfiguration.landscape = YES;
         videoConfiguration.sessionPreset = LFCaptureSessionPreset720x1280;

         _session = [[LFLiveSession alloc] initWithAudioConfiguration:audioConfiguration videoConfiguration:videoConfiguration];
         */

5.实现代理方法

/** live status changed will callback */
- (void)liveSession:(nullable LFLiveSession *)session liveStateDidChange:(LFLiveState)state {
    NSLog(@"session: %@", session);
    NSLog(@"liveStateDidChange: %ld", state);
    switch (state) {
        case LFLiveReady:
            _stateLabel.text = @"未连接";
            isRunning=NO;
             [self.playButton setTitle:@"开始直播" forState:UIControlStateNormal];
            break;
        case LFLivePending:
            _stateLabel.text = @"连接中";
            break;
        case LFLiveStart:
            _stateLabel.text = @"已连接";
            break;
        case LFLiveError:
            _stateLabel.text = @"连接错误";
            isRunning=NO;
             [self.playButton setTitle:@"开始直播" forState:UIControlStateNormal];
            break;
        case LFLiveStop:
            _stateLabel.text = @"已断开";
            isRunning=NO;
             [self.playButton setTitle:@"开始直播" forState:UIControlStateNormal];
            break;
        default:
            break;
    }
}

/** live debug info callback */
//直播流的信息，如果需要显示当前流量和实时码率等信息可以在这个方法里实现
- (void)liveSession:(nullable LFLiveSession *)session debugInfo:(nullable LFLiveDebug *)debugInfo {
    NSLog(@"debugInfo uploadSpeed: %@", formatedSpeed(debugInfo.currentBandwidth, debugInfo.elapsedMilli));
}

/** callback socket errorcode */
//连接失败
- (void)liveSession:(nullable LFLiveSession *)session errorCode:(LFLiveSocketErrorCode)errorCode {
    NSLog(@"errorCode: %ld", errorCode);
    isRunning=NO;
     [self.playButton setTitle:@"开始直播" forState:UIControlStateNormal];
}

6.开始直播

LFLiveStreamInfo *stream = [LFLiveStreamInfo new];
stream.url=@"rtmp://172.26.1.92:1935/liveOnline/6000";
[self.session startLive:stream];

7.结束直播

[self.session stopLive];

实现效果

实现效果如图6-12所示

图6-12