# 新建转码任务
您可以通过创建转码MpcClient实例并设置相关参数新建转码任务。
#### 核心代码
1. **创建转码MpcClient实例** 。
   ```
   public static MpcClient initMpcClient() {
       //设置httpConfig
       HttpConfig httpConfig = HttpConfig.getDefaultHttpConfig().withIgnoreSSLVerification(true).withTimeout(3);
       //根据实际需要，是否设置http代理
       //httpConfig.withProxyHost("xxxxxx").withProxyPort(xxxxxx).withProxyUsername("xxxxxx").
               //withProxyPassword("xxxxxx");
       //根据实际填写ak,sk，在控制台账号名下“我的凭证 > 访问密钥”上创建和查看您的AK/SK
       
       String ak = System.getenv("SDK_AK");
       String sk = System.getenv("SDK_SK");
       //根据实际填写项目ID，在控制台账号名下“我的凭证 > API凭证”下查看您的项目ID
       String projectId = System.getenv("PROJECT_ID");
       //根据实际填写所需Endpoint，这里以“region01”为例
       String endpoint = "https://mpc.region01.myhuaweicloud.com";
       BasicCredentials auth = new BasicCredentials().withAk(ak).withSk(sk).withProjectId(projectId);
       return MpcClient.newBuilder()
               .withHttpConfig(httpConfig)
               .withCredential(auth)
               .withEndpoint(endpoint)
               .build();
   }
   ```
   
2. **创建转码请求** **，并设置请求体** 。
   转码请求包括输入文件、输出文件和转码模板设置。具体参数含义请参考[新建转码任务](https://support.huaweicloud.com/api-mpc/mpc_04_0017.html)。
   ```
   //设置转码输入视频地址
   ObsObjInfo input = new ObsObjInfo()
       //设置桶名
       .withBucket("mpc-east-2")
       //设置OBS桶所在区域
       .withLocation("region01")
       //设置输入视频对象
       .withObject("input/ok.mp4");
   //设置转码输出视频路径
   ObsObjInfo output = new ObsObjInfo().withBucket("mpc-east-2").withLocation("region01")
           //设置输出路径
           .withObject("output");
   //创建转码请求
   CreateTranscodingTaskRequest request
           = new CreateTranscodingTaskRequest().withBody(new CreateTranscodingReq()
           .withInput(input)
           .withOutput(output)
           //设置转码模板，预置模板Id可以在MPC console页面“全局设置 > 预置模板”上查看
           .withTransTemplateId(Collections.singletonList(7000530))
           //设置输出名称，名称个数需要与模板个数一一对应
           .withOutputFilenames(Collections.singletonList("output_"))
           //设置截图参数，根据实际需要填充Thumbnail结构
           //.withThumbnail(new Thumbnail())
           //设置加密参数，根据实际需要填充Encryption结构
           //.withEncryption(new Encryption())
   );
   ```
   
3. **发送转码请求。**
   ```
   //发送媒体处理服务请求
   CreateTranscodingTaskResponse response = initMpcClient().createTranscodingTask(request);
   //返回消息
   System.out.println("CreateTranscodingTaskResponse=" + response);
   ```
   
 
#### 示例代码
```
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.http.HttpConfig;
import com.huaweicloud.sdk.core.utils.JsonUtils;
import com.huaweicloud.sdk.mpc.v1.MpcClient;
import com.huaweicloud.sdk.mpc.v1.model.CreateTranscodingReq;
import com.huaweicloud.sdk.mpc.v1.model.CreateTranscodingTaskRequest;
import com.huaweicloud.sdk.mpc.v1.model.CreateTranscodingTaskResponse;
import com.huaweicloud.sdk.mpc.v1.model.ListTranscodingTaskRequest;
import com.huaweicloud.sdk.mpc.v1.model.ListTranscodingTaskResponse;
import com.huaweicloud.sdk.mpc.v1.model.ObsObjInfo;
import com.obs.services.internal.ServiceException;
import org.junit.Test;
import java.util.Arrays;
import java.util.Collections;
public class TestTranscode {
    /**
     * 初始化 MpcClient
     * @return
     */
    public static MpcClient initMpcClient() {
        HttpConfig httpConfig = HttpConfig.getDefaultHttpConfig().withIgnoreSSLVerification(true).withTimeout(3);
        //http代理设置，请根据实际情况设置
        //httpConfig.withProxyHost("xxxxxx").withProxyPort(xxxxxx).withProxyUsername("xxxxxx").
        //        withProxyPassword("xxxxxx");
        //根据实际填写ak,sk，在控制台账号名下“我的凭证 > 访问密钥”上创建和查看您的AK/SK
        
        String ak = System.getenv("SDK_AK");
        String sk = System.getenv("SDK_SK");
        //根据实际填写项目ID，在控制台账号名下“我的凭证 > API凭证”下查看您的项目ID
        String projectId = System.getenv("PROJECT_ID");
        //根据实际填写所需endpoint，这里以“region01”为例
        String endpoint = "https://mpc.region01.myhuaweicloud.com";
        BasicCredentials auth = new BasicCredentials().withAk(ak).withSk(sk).withProjectId(projectId);
        return MpcClient.newBuilder()
                .withHttpConfig(httpConfig)
                .withCredential(auth)
                .withEndpoint(endpoint)
                .build();
    }
    /**
     * 创建转码任务
     * @param args
     */
    public static void main(String[] args) {
        //设置转码输入视频地址
        ObsObjInfo input = new ObsObjInfo().withBucket("mpc-east-2").withLocation("region01").withObject("ok.mp4");
        //设置转码输出视频路径
        ObsObjInfo output = new ObsObjInfo().withBucket("mpc-east-2").withLocation("region01").withObject("output");
        //创建转码请求
        CreateTranscodingTaskRequest request
                = new CreateTranscodingTaskRequest().withBody(new CreateTranscodingReq()
                .withInput(input)
                .withOutput(output)
                //设置转码模板，预置模板Id可以在MPC console页面“全局设置 > 预置模板”上查看
                .withTransTemplateId(Collections.singletonList(7000530))
                //设置输出名称，名称个数需要与模板个数一一对应
                .withOutputFilenames(Collections.singletonList("output_"))
                //设置截图参数
                //.withThumbnail(new Thumbnail())
                //设置加密参数
                //.withEncryption(new Encryption())
        );
        try {
            CreateTranscodingTaskResponse response = initMpcClient().createTranscodingTask(request);
            System.out.println("CreateTranscodingTaskResponse=" + response);
        } catch (ClientRequestException | ConnectionException | RequestTimeoutException | ServiceException e) {
            System.out.println(e);
        }
    }
}
```