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社区首页 >专栏 >腾讯云实时音视频服务端混流参数详解和4种排版方式

腾讯云实时音视频服务端混流参数详解和4种排版方式

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singleli
发布于 2022-11-28 00:14:58
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发布于 2022-11-28 00:14:58
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文章被收录于专栏：腾讯云终端专家服务

一、服务端四种混流模板 1、悬浮模板（LayoutParams.Template = 0）：

第一个进入房间的用户的视频画面会铺满整个屏幕，其他用户的视频画面从左下角依次水平排列，显示为小画面。 最多4行，每行最多4个，小画面悬浮于大画面之上。 最多支持1个大画面和15个小画面。 如果用户只发送音频，仍然会占用画面位置。

代码如下：

代码语言：javascript
复制
import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.HttpProfile;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
import com.tencentcloudapi.trtc.v20190722.TrtcClient;
import com.tencentcloudapi.trtc.v20190722.models.*;;
public class StartMCUMixTranscode
{
    public static void main(String [] args) {
        try{
            Credential cred = new Credential("SecretId", "SecretKey");
            HttpProfile httpProfile = new HttpProfile();
            httpProfile.setEndpoint("trtc.tencentcloudapi.com");
            ClientProfile clientProfile = new ClientProfile();
            clientProfile.setHttpProfile(httpProfile);
            TrtcClient client = new TrtcClient(cred, "ap-guangzhou", clientProfile);
            StartMCUMixTranscodeRequest req = new StartMCUMixTranscodeRequest();
            req.setSdkAppId(1400505488L);
            req.setRoomId(661L);
            OutputParams outputParams1 = new OutputParams();
            outputParams1.setStreamId("crk661");
            outputParams1.setPureAudioStream(0L);
            outputParams1.setRecordId("crk");
            outputParams1.setRecordAudioOnly(0L);
            req.setOutputParams(outputParams1);
            EncodeParams encodeParams1 = new EncodeParams();
            encodeParams1.setVideoWidth(720L);
            encodeParams1.setVideoHeight(1280L);
            encodeParams1.setVideoBitrate(1500L);
            encodeParams1.setVideoFramerate(20L);
            encodeParams1.setVideoGop(3L);
            encodeParams1.setBackgroundColor(3394560L);
            encodeParams1.setAudioSampleRate(48000L);
            encodeParams1.setAudioBitrate(64L);
            encodeParams1.setAudioChannels(2L);
            encodeParams1.setAudioCodec(0L);
            req.setEncodeParams(encodeParams1);
            LayoutParams layoutParams1 = new LayoutParams();
            layoutParams1.setTemplate(0L);
            layoutParams1.setMainVideoUserId("666");
            layoutParams1.setMainVideoStreamType(0L);
            SmallVideoLayoutParams smallVideoLayoutParams1 = new SmallVideoLayoutParams();
            smallVideoLayoutParams1.setUserId("555");
            smallVideoLayoutParams1.setStreamType(0L);
            smallVideoLayoutParams1.setImageWidth(350L);
            smallVideoLayoutParams1.setImageHeight(350L);
            smallVideoLayoutParams1.setLocationX(370L);
            smallVideoLayoutParams1.setLocationY(930L);
            layoutParams1.setSmallVideoLayoutParams(smallVideoLayoutParams1);
            layoutParams1.setMainVideoRightAlign(0L);
            String[] mixVideoUids1 = {"111", "222", "333", "444"};
            layoutParams1.setMixVideoUids(mixVideoUids1);
            req.setLayoutParams(layoutParams1);
            PublishCdnParams publishCdnParams1 = new PublishCdnParams();
            publishCdnParams1.setBizId(9926L);
            String[] publishCdnUrls1 = {"http://cctv.com"};
            publishCdnParams1.setPublishCdnUrls(publishCdnUrls1);
            req.setPublishCdnParams(publishCdnParams1);
            StartMCUMixTranscodeResponse resp = client.StartMCUMixTranscode(req);
            System.out.println(StartMCUMixTranscodeResponse.toJsonString(resp));
        } catch (TencentCloudSDKException e) {
                System.out.println(e.toString());
        }
    }
}

2、九宫格模板（LayoutParams.Template = 1）：

所有用户的视频画面大小一致，平分整个屏幕，人数越多，每个画面的尺寸越小。 最多支持16个画面，如果用户只发送音频，仍然会占用画面位置。

代码如下：

代码语言：javascript
复制
import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.HttpProfile;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
import com.tencentcloudapi.trtc.v20190722.TrtcClient;
import com.tencentcloudapi.trtc.v20190722.models.*;;
public class StartMCUMixTranscode
{
    public static void main(String [] args) {
        try{
            Credential cred = new Credential("SecretId", "SecretKey");
            HttpProfile httpProfile = new HttpProfile();
            httpProfile.setEndpoint("trtc.tencentcloudapi.com");
            ClientProfile clientProfile = new ClientProfile();
            clientProfile.setHttpProfile(httpProfile);
            TrtcClient client = new TrtcClient(cred, "ap-guangzhou", clientProfile);
            StartMCUMixTranscodeRequest req = new StartMCUMixTranscodeRequest();
            req.setSdkAppId(1400505488L);
            req.setRoomId(661L);
            OutputParams outputParams1 = new OutputParams();
            outputParams1.setStreamId("crk661");
            outputParams1.setPureAudioStream(0L);
            outputParams1.setRecordId("crk");
            outputParams1.setRecordAudioOnly(0L);
            req.setOutputParams(outputParams1);
            EncodeParams encodeParams1 = new EncodeParams();
            encodeParams1.setVideoWidth(720L);
            encodeParams1.setVideoHeight(1280L);
            encodeParams1.setVideoBitrate(1500L);
            encodeParams1.setVideoFramerate(20L);
            encodeParams1.setVideoGop(3L);
            encodeParams1.setBackgroundColor(3394560L);
            encodeParams1.setAudioSampleRate(48000L);
            encodeParams1.setAudioBitrate(64L);
            encodeParams1.setAudioChannels(2L);
            encodeParams1.setAudioCodec(0L);
            req.setEncodeParams(encodeParams1);
            LayoutParams layoutParams1 = new LayoutParams();
            layoutParams1.setTemplate(1L);
            layoutParams1.setMainVideoUserId("666");
            layoutParams1.setMainVideoStreamType(0L);
            SmallVideoLayoutParams smallVideoLayoutParams1 = new SmallVideoLayoutParams();
            smallVideoLayoutParams1.setUserId("555");
            smallVideoLayoutParams1.setStreamType(0L);
            smallVideoLayoutParams1.setImageWidth(350L);
            smallVideoLayoutParams1.setImageHeight(350L);
            smallVideoLayoutParams1.setLocationX(370L);
            smallVideoLayoutParams1.setLocationY(930L);
            layoutParams1.setSmallVideoLayoutParams(smallVideoLayoutParams1);
            layoutParams1.setMainVideoRightAlign(0L);
            String[] mixVideoUids1 = {"111", "222", "333", "444"};
            layoutParams1.setMixVideoUids(mixVideoUids1);
            layoutParams1.setPureAudioHoldPlaceMode(0L);
            req.setLayoutParams(layoutParams1);
            PublishCdnParams publishCdnParams1 = new PublishCdnParams();
            publishCdnParams1.setBizId(9926L);
            String[] publishCdnUrls1 = {"http://cctv.com"};
            publishCdnParams1.setPublishCdnUrls(publishCdnUrls1);
            req.setPublishCdnParams(publishCdnParams1);
            StartMCUMixTranscodeResponse resp = client.StartMCUMixTranscode(req);
            System.out.println(StartMCUMixTranscodeResponse.toJsonString(resp));
        } catch (TencentCloudSDKException e) {
                System.out.println(e.toString());
        }
    }
}

3、屏幕分享模板（LayoutParams.Template = 2）

适合视频会议和在线教育场景的布局。 屏幕分享（或者主讲的摄像头）始终占据屏幕左侧的大画面位置，其他用户依次垂直排列于右侧。 需要通过 LayoutParams.MainVideoUserId 和 LayoutParams.MainVideoStreamType 这两个参数来指定左侧主画面的内容。 最多两列，每列最多8个小画面。最多支持1个大画面和15个小画面。 如果用户只发送音频，仍然会占用画面位置。

代码如下：

代码语言：javascript
复制
import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.HttpProfile;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
import com.tencentcloudapi.trtc.v20190722.TrtcClient;
import com.tencentcloudapi.trtc.v20190722.models.*;;
public class StartMCUMixTranscode
{
    public static void main(String [] args) {
        try{
            Credential cred = new Credential("SecretId", "SecretKey");
            HttpProfile httpProfile = new HttpProfile();
            httpProfile.setEndpoint("trtc.tencentcloudapi.com");
            ClientProfile clientProfile = new ClientProfile();
            clientProfile.setHttpProfile(httpProfile);
            TrtcClient client = new TrtcClient(cred, "ap-guangzhou", clientProfile);
            StartMCUMixTranscodeRequest req = new StartMCUMixTranscodeRequest();
            req.setSdkAppId(1400505488L);
            req.setRoomId(661L);
            OutputParams outputParams1 = new OutputParams();
            outputParams1.setStreamId("crk661");
            outputParams1.setPureAudioStream(0L);
            outputParams1.setRecordId("crk");
            outputParams1.setRecordAudioOnly(0L);
            req.setOutputParams(outputParams1);
            EncodeParams encodeParams1 = new EncodeParams();
            encodeParams1.setVideoWidth(720L);
            encodeParams1.setVideoHeight(1280L);
            encodeParams1.setVideoBitrate(1500L);
            encodeParams1.setVideoFramerate(20L);
            encodeParams1.setVideoGop(3L);
            encodeParams1.setBackgroundColor(3394560L);
            encodeParams1.setAudioSampleRate(48000L);
            encodeParams1.setAudioBitrate(64L);
            encodeParams1.setAudioChannels(2L);
            encodeParams1.setAudioCodec(0L);
            req.setEncodeParams(encodeParams1);
            LayoutParams layoutParams1 = new LayoutParams();
            layoutParams1.setTemplate(2L);
            layoutParams1.setMainVideoUserId("666");
            layoutParams1.setMainVideoStreamType(0L);
            SmallVideoLayoutParams smallVideoLayoutParams1 = new SmallVideoLayoutParams();
            smallVideoLayoutParams1.setUserId("555");
            smallVideoLayoutParams1.setStreamType(0L);
            smallVideoLayoutParams1.setImageWidth(350L);
            smallVideoLayoutParams1.setImageHeight(350L);
            smallVideoLayoutParams1.setLocationX(370L);
            smallVideoLayoutParams1.setLocationY(930L);
            layoutParams1.setSmallVideoLayoutParams(smallVideoLayoutParams1);
            layoutParams1.setMainVideoRightAlign(0L);
            String[] mixVideoUids1 = {"111", "222", "333", "444"};
            layoutParams1.setMixVideoUids(mixVideoUids1);
            layoutParams1.setPureAudioHoldPlaceMode(0L);
            req.setLayoutParams(layoutParams1);
            PublishCdnParams publishCdnParams1 = new PublishCdnParams();
            publishCdnParams1.setBizId(9926L);
            String[] publishCdnUrls1 = {"http://cctv.com"};
            publishCdnParams1.setPublishCdnUrls(publishCdnUrls1);
            req.setPublishCdnParams(publishCdnParams1);
            StartMCUMixTranscodeResponse resp = client.StartMCUMixTranscode(req);
            System.out.println(StartMCUMixTranscodeResponse.toJsonString(resp));
        } catch (TencentCloudSDKException e) {
                System.out.println(e.toString());
        }
    }
}

4、画中画模板（LayoutParams.Template = 3）：

该模板以“一大一小，一前一后”的模式混合房间中的两路画面，即将房间中一路画面铺满整个屏幕，再将一路画面作为小画面悬浮在大画面之上，小画面的位置可以通过参数指定。 您可以通过 LayoutParams 中的 MainVideoUserId 和 MainVideoStreamType 参数指定大画面这一路的用户 ID 和流类型。 您可以通过 LayoutParams 中的 SmallVideoLayoutParams 参数指定小画面这一路的用户 ID、流类型和布局位置等信息。 场景示例1：在线教育场景中，混合老师端摄像头（通常作为小画面）和老师端屏幕（通常作为大画面）两路画面，并混合课堂中学生的声音。 场景示例2：1v1 视频通话场景中，混合远端用户画面（通常作为大画面）和本地用户画面（通常作为小画面）。

代码如下：

代码语言：javascript
复制
import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.HttpProfile;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
import com.tencentcloudapi.trtc.v20190722.TrtcClient;
import com.tencentcloudapi.trtc.v20190722.models.*;;
public class StartMCUMixTranscode
{
    public static void main(String [] args) {
        try{
            Credential cred = new Credential("SecretId", "SecretKey");
            HttpProfile httpProfile = new HttpProfile();
            httpProfile.setEndpoint("trtc.tencentcloudapi.com");
            ClientProfile clientProfile = new ClientProfile();
            clientProfile.setHttpProfile(httpProfile);
            TrtcClient client = new TrtcClient(cred, "ap-guangzhou", clientProfile);
            StartMCUMixTranscodeRequest req = new StartMCUMixTranscodeRequest();
            req.setSdkAppId(1400505488L);
            req.setRoomId(661L);
            OutputParams outputParams1 = new OutputParams();
            outputParams1.setStreamId("crk661");
            outputParams1.setPureAudioStream(0L);
            outputParams1.setRecordId("crk");
            outputParams1.setRecordAudioOnly(0L);
            req.setOutputParams(outputParams1);
            EncodeParams encodeParams1 = new EncodeParams();
            encodeParams1.setVideoWidth(720L);
            encodeParams1.setVideoHeight(1280L);
            encodeParams1.setVideoBitrate(1500L);
            encodeParams1.setVideoFramerate(20L);
            encodeParams1.setVideoGop(3L);
            encodeParams1.setBackgroundColor(3394560L);
            encodeParams1.setAudioSampleRate(48000L);
            encodeParams1.setAudioBitrate(64L);
            encodeParams1.setAudioChannels(2L);
            encodeParams1.setAudioCodec(0L);
            req.setEncodeParams(encodeParams1);
            LayoutParams layoutParams1 = new LayoutParams();
            layoutParams1.setTemplate(3L);
            layoutParams1.setMainVideoUserId("666");
            layoutParams1.setMainVideoStreamType(0L);
            SmallVideoLayoutParams smallVideoLayoutParams1 = new SmallVideoLayoutParams();
            smallVideoLayoutParams1.setUserId("555");
            smallVideoLayoutParams1.setStreamType(0L);
            smallVideoLayoutParams1.setImageWidth(350L);
            smallVideoLayoutParams1.setImageHeight(350L);
            smallVideoLayoutParams1.setLocationX(370L);
            smallVideoLayoutParams1.setLocationY(930L);
            layoutParams1.setSmallVideoLayoutParams(smallVideoLayoutParams1);
            layoutParams1.setMainVideoRightAlign(0L);
            String[] mixVideoUids1 = {"111", "222", "333", "444"};
            layoutParams1.setMixVideoUids(mixVideoUids1);
            layoutParams1.setPureAudioHoldPlaceMode(0L);
            req.setLayoutParams(layoutParams1);
            PublishCdnParams publishCdnParams1 = new PublishCdnParams();
            publishCdnParams1.setBizId(9926L);
            String[] publishCdnUrls1 = {"http://cctv.com"};
            publishCdnParams1.setPublishCdnUrls(publishCdnUrls1);
            req.setPublishCdnParams(publishCdnParams1);
            StartMCUMixTranscodeResponse resp = client.StartMCUMixTranscode(req);
            System.out.println(StartMCUMixTranscodeResponse.toJsonString(resp));
        } catch (TencentCloudSDKException e) {
                System.out.println(e.toString());
        }
    }
}

5、自定义模板（LayoutParams.Template = 4）：

适用于需要自定义排布各路画面位置的场景，您可以通过 LayoutParams 中的 PresetLayoutConfig 参数（这是一个数组），预先设置各路画面的位置。 您可以不指定 PresetLayoutConfig 参数中的 UserId 参数，排版引擎会根据进房的先后顺序，将进房的用户依次分配到 PresetLayoutConfig 数组中指定的各个位置上。 如果 PresetLayoutConfig 数组中的某一个被指定了 UserId 参数，则排版引擎会预先给指定的用户预留好他/她在画面中的位置。 如果用户只上行音频，不上行视频，该用户依然会占用画面位置。 当 PresetLayoutConfig 数组中预设的位置被用完后，排版引擎将不再混合其它用户的画面和声音。

注意： 云端混流服务最多支持同时混合16路音视频流，如果用户只有音频也会被算作一路。

代码如下：

代码语言：javascript
复制
import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.HttpProfile;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
import com.tencentcloudapi.trtc.v20190722.TrtcClient;
import com.tencentcloudapi.trtc.v20190722.models.*;;
public class StartMCUMixTranscode
{
    public static void main(String [] args) {
        try{
            Credential cred = new Credential("SecretId", "SecretKey");
            HttpProfile httpProfile = new HttpProfile();
            httpProfile.setEndpoint("trtc.tencentcloudapi.com");
            ClientProfile clientProfile = new ClientProfile();
            clientProfile.setHttpProfile(httpProfile);
            TrtcClient client = new TrtcClient(cred, "ap-guangzhou", clientProfile);
            StartMCUMixTranscodeRequest req = new StartMCUMixTranscodeRequest();
            req.setSdkAppId(1400505488L);
            req.setRoomId(661L);
            OutputParams outputParams1 = new OutputParams();
            outputParams1.setStreamId("crk661");
            outputParams1.setPureAudioStream(0L);
            outputParams1.setRecordId("crk");
            outputParams1.setRecordAudioOnly(0L);
            req.setOutputParams(outputParams1);
            EncodeParams encodeParams1 = new EncodeParams();
            encodeParams1.setVideoWidth(720L);
            encodeParams1.setVideoHeight(1280L);
            encodeParams1.setVideoBitrate(1500L);
            encodeParams1.setVideoFramerate(20L);
            encodeParams1.setVideoGop(3L);
            encodeParams1.setBackgroundColor(3394560L);
            encodeParams1.setAudioSampleRate(48000L);
            encodeParams1.setAudioBitrate(64L);
            encodeParams1.setAudioChannels(2L);
            encodeParams1.setAudioCodec(0L);
            req.setEncodeParams(encodeParams1);
            LayoutParams layoutParams1 = new LayoutParams();
            layoutParams1.setTemplate(3L);
            layoutParams1.setMainVideoUserId("666");
            layoutParams1.setMainVideoStreamType(0L);
            SmallVideoLayoutParams smallVideoLayoutParams1 = new SmallVideoLayoutParams();
            smallVideoLayoutParams1.setUserId("555");
            smallVideoLayoutParams1.setStreamType(0L);
            smallVideoLayoutParams1.setImageWidth(350L);
            smallVideoLayoutParams1.setImageHeight(350L);
            smallVideoLayoutParams1.setLocationX(370L);
            smallVideoLayoutParams1.setLocationY(930L);
            layoutParams1.setSmallVideoLayoutParams(smallVideoLayoutParams1);
            layoutParams1.setMainVideoRightAlign(0L);
            String[] mixVideoUids1 = {"111", "222", "333", "444"};
            layoutParams1.setMixVideoUids(mixVideoUids1);
            PresetLayoutConfig[] presetLayoutConfigs1 = new PresetLayoutConfig[2];
            PresetLayoutConfig presetLayoutConfig1 = new PresetLayoutConfig();
            presetLayoutConfig1.setUserId("224");
            presetLayoutConfig1.setStreamType(0L);
            presetLayoutConfig1.setImageWidth(350L);
            presetLayoutConfig1.setImageHeight(350L);
            presetLayoutConfig1.setLocationX(370L);
            presetLayoutConfig1.setLocationY(930L);
            presetLayoutConfig1.setZOrder(0L);
            presetLayoutConfig1.setRenderMode(0L);
            presetLayoutConfig1.setMixInputType(0L);
            presetLayoutConfigs1[0] = presetLayoutConfig1;
            PresetLayoutConfig presetLayoutConfig2 = new PresetLayoutConfig();
            presetLayoutConfig2.setUserId("225");
            presetLayoutConfig2.setStreamType(0L);
            presetLayoutConfig2.setImageWidth(350L);
            presetLayoutConfig2.setImageHeight(350L);
            presetLayoutConfig2.setLocationX(370L);
            presetLayoutConfig2.setLocationY(580L);
            presetLayoutConfig2.setZOrder(1L);
            presetLayoutConfig2.setRenderMode(0L);
            presetLayoutConfigs1[1] = presetLayoutConfig2;
            layoutParams1.setPresetLayoutConfig(presetLayoutConfigs1);
            layoutParams1.setPlaceHolderMode(0L);
            layoutParams1.setPureAudioHoldPlaceMode(0L);
            req.setLayoutParams(layoutParams1);
            PublishCdnParams publishCdnParams1 = new PublishCdnParams();
            publishCdnParams1.setBizId(9926L);
            String[] publishCdnUrls1 = {"http://cctv.com"};
            publishCdnParams1.setPublishCdnUrls(publishCdnUrls1);
            req.setPublishCdnParams(publishCdnParams1);
            StartMCUMixTranscodeResponse resp = client.StartMCUMixTranscode(req);
            System.out.println(StartMCUMixTranscodeResponse.toJsonString(resp));
        } catch (TencentCloudSDKException e) {
                System.out.println(e.toString());
        }
    }
}

二、混流参数详解：

1、首先先配置TRTC的SDKAppId和房间号RoomId

2、在调用REST API StartMCUMixTranscode时，先手要设置一下LayoutParams参数（混流输出布局参数）。

LayoutParams.Template的值分别是：0（悬浮模板）、1（九宫格模板）、2（屏幕分享模板）、3（画中画模板）、4（自定义模板）

3、混流编码参数混流编码参数：EncodeParams

4、混流输出控制参数：OutputParams

MCU混流的输出参数

5、第三方CDN转推参数：PublishCdnParams

原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。

如有侵权，请联系 cloudcommunity@tencent.com 删除。

编程算法

原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。

如有侵权，请联系 cloudcommunity@tencent.com 删除。

编程算法
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