vc-server.js

/**
 * This NodeJS gist creates a virtual linear channel (VOD2Live) with one ad break (105 sec) and a trailer,
 * both on loop.
 * 
 * npm install --save eyevinn-channel-engine
 * node server.js
 * 
 * Then play the HLS from:
 * http://localhost:8000/live/master.m3u8?channel=1
 *
 */
const ChannelEngine = require("eyevinn-channel-engine");
const STITCH_ENDPOINT = process.env.STITCH_ENDPOINT || "http://lambda.eyevinn.technology/stitch/master.m3u8";

class MyAssetManager {
  getNextVod(vodRequest) {
    return new Promise((resolve, reject) => {
      const payload = {
        uri: "https://maitv-vod.lab.eyevinn.technology/UNHINGED_Trailer_2020.mp4/master.m3u8",
        breaks: [
          {
            pos: 0,
            duration: 105 * 1000,
            url: "https://maitv-vod.lab.eyevinn.technology/VINN.mp4/master.m3u8"
          }
        ]
      };
      const buff = Buffer.from(JSON.stringify(payload));
      const encodedPayload = buff.toString("base64");
      const vod = {
        id: 1,
        title: "VINN",
        uri: STITCH_ENDPOINT + "?payload=" + encodedPayload,
      }
      resolve(vod);
    });
  }
}

class MyChannelManager {
  getChannels() {
    return [ { id: "1", profile: this._getProfile() }];
  }

  _getProfile() {
    return [
      { bw: 6134000, codecs: 'avc1.4d001f,mp4a.40.2', resolution: [ 1024, 458 ] },
      { bw: 2323000, codecs: 'avc1.4d001f,mp4a.40.2', resolution: [ 640, 286 ] },
      { bw: 1313000, codecs: 'avc1.4d001f,mp4a.40.2', resolution: [ 480, 214 ] }
    ];
  }
}

const myAssetManager = new MyAssetManager();
const myChannelManager = new MyChannelManager();

const engine = new ChannelEngine(myAssetManager, { 
  heartbeat: "/", 
  defaultSlateUri: "https://maitv-vod.lab.eyevinn.technology/slate-consuo.mp4/master.m3u8",
  averageSegmentDuration: 7200,
  channelManager: myChannelManager, 
});

engine.start();
engine.listen(process.env.port || 8000);