Set opening and ending parts during video merging

Sample code

import Console from '@alicloud/tea-console';
import OpenApi, * as $OpenApi from '@alicloud/openapi-client';
import Env from '@alicloud/darabonba-env';
import Util from '@alicloud/tea-util';
import mts20140618, * as $mts20140618 from '@alicloud/mts20140618';
import * as $tea from '@alicloud/tea-typescript';

/**
 * Install Node.js 8.x or later. 
 * Install Alibaba Cloud SDK for Node.js. npm install @alicloud/pop-core --save
 * Install the Alibaba Cloud SDK Credentials package.   npm install @alicloud/credentials
 * Install MPS SDK for Node.js. npm install --save @alicloud/mts20140618
 * 
 */
/** The ID of the MPS queue. You can log on to the MPS console to view the ID. */
var pipelineId = "d7cedd984be7dd63395c*****"; 
/** The ID of the transcoding template. Select a transcoding template as needed. */
var templateId = "S00000001-100020"; 
var ossLocation = "oss-cn-shanghai";
var bucket = "<bucket name>";
var ossInputObject = "input.mp4";
var ossOutputObject = "merged.mp4";
var headObject = "head.mp4";
var tailObject = "tail.mp4";


export default class Client {

/** Initialize the SDK client. */
static async createClient(accessKeyId: string, accessKeySecret: string, regionId: string): Promise<mts20140618> {
    let config = new $OpenApi.Config({ });
    config.accessKeyId = accessKeyId;
    config.accessKeySecret = accessKeySecret;
    /** The ID of the region in which your MPS service is deployed. */
    config.regionId = "cn-shanghai";
    return new mts20140618(config);
}

static async main(args: string[]): Promise<void> {
    let client = await Client.createClient(Env.getEnv("ALIBABA_CLOUD_ACCESS_KEY_ID"), Env.getEnv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"), args[0]);

    let request = new $mts20140618.SubmitJobsRequest({
        input: inputParam(),
        outputs: outputParam(),
        outputBucket: bucket,
        pipelineId: pipelineId,
        outputLocation: ossLocation
    });
    let response = await client.submitJobs(request);
    Console.log(Util.toJSONString($tea.toMap(response)));
}
}

Client.main(process.argv.slice(2));


function inputParam() {
    var input:any = {};
    input.Location = ossLocation;
    input.Bucket = bucket;
    input.Object = encodeURIComponent(ossInputObject);
    return JSON.stringify(input);
}

function outputParam() {
    var outputOSSObject = encodeURIComponent(ossOutputObject);
    var output:any = {};
    output.OutputObject = outputOSSObject;
    output.TemplateId = templateId;
    /** The video-related parameters. */
    var video:any = {};
    video.Width = "1280";
    video.Height = "720";
    output.Video = JSON.stringify(video);
    /** Set the opening part. */
    var openingVideo:any = {};
    var openingVideoURL = "http://example-bucket.oss-cn-shanghai.aliyuncs.com/" + encodeURIComponent(headObject)
    openingVideo.OpenUrl = openingVideoURL;
    openingVideo.Width = "640";
    openingVideo.Start = "2";
    var openingVideoList = new Array();
    openingVideoList.push(openingVideo);
    output.OpeningList = JSON.stringify(openingVideoList);
    /** Set the ending part. */
    var tailSlateVideo:any = {};
    var tailSlateVideoURL = "http://example-bucket.oss-cn-shanghai.aliyuncs.com/" + encodeURIComponent(tailObject)
    tailSlateVideo.TailUrl = tailSlateVideoURL;
    tailSlateVideo.Width = "640";
    tailSlateVideo.BlendDuration = "3";
    tailSlateVideo.BgColor = "Black";
    var tailSlateVideoList = new Array();
    tailSlateVideoList.push(tailSlateVideo);
    output.TailSlateList = JSON.stringify(tailSlateVideoList);

    var outputs = new Array();
    outputs.push(output);

    return JSON.stringify(outputs);
}