如何基于ReplayKit实现低延迟rtmp推屏

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如何基于ReplayKit实现低延迟rtmp推屏

daniulivesdk 2018-03-27 15:14:01 浏览499
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目录

1背景说明

2 iOS录制屏幕三要素

3集成说明

4 SDK对接

5 SDK运行

6如何在移动端测试

7 Demo下载

1背景说明

在ReplayKit live未出来之前,iOS推流屏幕信息,必须使用实际或虚拟的AirPlay模式,使用起来非常不便,自iOS 10开始,苹果在 iOS 9 的 ReplayKit 保存录屏视频的基础上,增加了视频流实时直播功能,iOS 11新增的ReplayKit2,进一步提升了Replaykit的易用性,可以对整个手机实现屏幕录制,不再局限于特定App。ReplayKit的出现,让直播更稳定、对设备性能要求低、并可直接嵌入主 app。

iOS录制屏幕三要素

宿主App:被录屏的应用(对应SmartiOSScreenPublisherV2)

容器App:本身与录屏直播没有直接关系, 仅仅提供录屏App扩展的发布渠道(对应DaniuliveExtSetupUI)

录屏App扩展:实现录屏和直播的主要功能(对应DaniuliveExt)

3集成说明

添加扩展:File->New Target:


填写Product Name:


配置好Product Name(记得勾选”Include UI Extension”)。点”Finish”后可以看到,工程多了两个目录,target也多了两个,对应直播扩展和UI扩展:


APP内需要处理的两个扩展:

Broadcast UI Extension: 提供类似用户登录、URL设置等配置选项的界面,本实例,由于我们在DaniuliveExtSetupUI中新创建了MainInterface.storyboard,将info.plist中的:

NSExtensionPrincipalClass

BroadcastSetupViewController

换成

NSExtensionMainStoryboard

MainInterface

Broadcast Upload Extension:接收图像和音频数据, 进行直播,集成daniulive推送SDK的工作主要在Upload扩展的代码中进行,info.plist中添加音频权限:

NSMicrophoneUsageDescription

请允许使用麦克风

如需生成后台可直接启用的录制程序,info.plist中NSExtensionPointIdentifier改为:

NSExtensionPointIdentifier

com.apple.broadcast-services-upload

如需APP内部debug,查看SampleHandler里面的log,请设置为

NSExtensionPointIdentifier

com.apple.broadcast-services

4 SDK对接

导入DaniuliveSDK,对应“DaniuliveExt\daniuliveSDK”下的include和libs。


添加依赖库:


编写UI扩展(对应DaniuliveExtSetupUI):

//Called when the user has finished interacting with the view controller and a broadcast stream can start

- (void)userDidFinishSetup {

 // Broadcast url that will be returned to the application

 NSURL *broadcastURL = [NSURL URLWithString: _rtmpUrl.text];

 // Service specific broadcast data example which will be supplied to the process extension during broadcast

 NSString *endpointURL = _rtmpUrl.text;

 NSDictionary *setupInfo = @{@"endpointURL" : endpointURL};

 // Set broadcast settings

 RPBroadcastConfiguration *broadcastConfig = [[RPBroadcastConfiguration alloc] init];

 // Tell ReplayKit that the extension is finished setting up and can begin broadcasting

 [self.extensionContext completeRequestWithBroadcastURL:broadcastURL broadcastConfiguration:broadcastConfig setupInfo:setupInfo];

}

- (void)userDidCancelSetup {

 // Tell ReplayKit that the extension was

 // cancelled by the user

 NSError * err = [NSError errorWithDomain:@"com.daniulive.ios"

                                     code:-1

                                 userInfo:nil];

 [self.extensionContext cancelRequestWithError:err];

}

SampleHandler.m调用SDK即可:

[if !supportLists]1. [endif]初始化并推送:

[self InitPublisher];

[self StartPublisher];

[if !supportLists]2. [endif]实时数据回调处理:

- (void)processSampleBuffer:(CMSampleBufferRef)sampleBuffer

                   withType:(RPSampleBufferType)sampleBufferType {

    switch (sampleBufferType) {

        case RPSampleBufferTypeVideo:

        {

            NSLog(@"RPSampleBufferTypeVideo");

            if(_smart_publisher_sdk)

            {

                [_smart_publisher_sdk SmartPublisherPostVideoSampleBuffer:sampleBuffer];

            }

        }

            break;

        case RPSampleBufferTypeAudioApp:

            NSLog(@"RPSampleBufferTypeAudioApp");


            if (s_headPhoneIn || s_isMicEnable == Mic_Disable)

            {

                if (CMSampleBufferDataIsReady(sampleBuffer) != NO)

                {

                    if(_smart_publisher_sdk)

                    {

                        NSInteger type = 2;

                        [_smart_publisher_sdk SmartPublisherPostAudioSampleBuffer:sampleBuffer inputType:type];

                    }

                }

            }

            break;

        case RPSampleBufferTypeAudioMic:

            NSLog(@"RPSampleBufferTypeAudioMic");

            if(_smart_publisher_sdk)

            {

                NSInteger type = 1;

                [_smart_publisher_sdk SmartPublisherPostAudioSampleBuffer:sampleBuffer inputType:type];

            }

            break;

        default:

            break;

    }

}

[if !supportLists]3. [endif]退出:

    [self StopPublisher];

    [self UnInitPublisher];

NOTE:集成时DaniuliveExt请使用daniulive demo里面的app-name测试,如需授权,请联系大牛直播SDK工作人员。

5 SDK运行

1. 先运行SmartiOSScreenPublisherV2,在移动端生成宿主app;

2. 再运行DaniuliveExtSetupUI,加载到宿主app;

3. 最后运行DaniuliveExt,加载到宿主app。

6如何在移动端测试

前台启动,设置推送的url,点击“开始推屏”:




后台启动(推屏rtmp url可在前台推送url页面设置):

 





7 Demo下载

测试Demo可以到Github或者QQ群共享下载

Github:https://github.com/daniulive/SmarterStreaming/

CSDN Demo下载链接: https://download.csdn.net/download/renhui1112/10313775

QQ群:

大牛直播精英群: 294891451

大牛直播技术交流群: 499687479


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