mkv file error: Error adding External Input:-2

[fengmao31]

Ubuntu20

Problem

when I push the vp8 mkv file, it show the error
(Room) message: Error subscribing to stream

Code

const serverUrl = '/';
let localStream;
let room;

window.onload = function () {

  const config = { audio: true, video: true, data: true, videoSize: [640, 480, 640, 480] };
  const config2 = { video: true, audio: false, url: "rtsp://172.28.5.201:8554/live/test" };
  const config3 = { video: true, audio: false, url: "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mp4" };
  const config4  = {video: true, audio: false, url: "file:///home/fengmao/output.mkv" };
var localStream = Erizo.Stream(config4);

const createToken = (userName, role, callback) => {
    const req = new XMLHttpRequest();
    const url = `${serverUrl}createToken/`;
    const body = { username: userName, role };

    req.onreadystatechange = () => {
      if (req.readyState === 4) {
        callback(req.responseText);
      }
    };

    req.open('POST', url, true);
    req.setRequestHeader('Content-Type', 'application/json');
    req.send(JSON.stringify(body));
  };

  createToken('user', 'presenter', (response) => {
    const token = response;
    console.log(token);
    room = Erizo.Room({ token });

localStream.addEventListener("access-accepted", function () {

    var subscribeToStreams = function (streams) {
        for (var index in streams) {
          var stream = streams[index];
          if (localStream.getID() !== stream.getID()) {
              room.subscribe(stream);
          }
        }
    };

    room.addEventListener("room-connected", function (roomEvent) {

        room.publish(localStream);
        subscribeToStreams(roomEvent.streams);
    });

    room.addEventListener("stream-subscribed", function(streamEvent) {
        var stream = streamEvent.stream;
        var div = document.createElement('div');
        div.setAttribute("style", "width: 320px; height: 240px;");
        div.setAttribute("id", "test" + stream.getID());

        document.body.appendChild(div);
        stream.play("test" + stream.getID());
    });

    room.addEventListener("stream-added", function (streamEvent) {
        var streams = [];
        streams.push(streamEvent.stream);
        subscribeToStreams(streams);
    });

    room.addEventListener("stream-removed", function (streamEvent) {
        // Remove stream from DOM
        var stream = streamEvent.stream;
        if (stream.elementID !== undefined) {
            var element = document.getElementById(stream.elementID);
            document.body.removeChild(element);
        }
    });

    room.connect();
    localStream.play("myVideo");
});
localStream.init();});
};

Console

eyJ0b2tlbklkIjoiNjJkZjZhYTM5ZTFlMzQwMzBmMjAwMTgxIiwiaG9zdCI6IjE3Mi4yOC44LjIyOjgwODAiLCJzZWN1cmUiOnRydWUsInNpZ25hdHVyZSI6Ik9XSTRaakZoTkRNM01EUmhaV1UwWldaa1pUQTFZMlU0WldOaFpqQTBOMlZqWkdReU9EZ3haQT09In0=
erizo.js:100 INFO:  (Room) message: Connecting to room, tokenId: 62df6aa39e1e34030f200181
erizo.js:100 INFO:  (Socket) message: connect, previousState: Symbol(disconnected), id: undefined
erizo.js:100 INFO:  (Socket) message: connected, previousState: Symbol(disconnected), id: undefined
erizo.js:100 INFO:  (Room) message: Connected to room, roomId: 62dbd35b1ff6bf0304a3d79c
erizo.js:100 INFO:  (Room) message: Publishing stream, streamId: local, label: ei_4785, roomId: 62dbd35b1ff6bf0304a3d79c
erizo.js:100 DEBUG:  (Room) message: Checking publish options, streamId: local, label: ei_4785, roomId: 62dbd35b1ff6bf0304a3d79c
erizo.js:100 ERROR:  (Room) message: Error when publishing the stream, streamId: local, label: ei_4785, roomId: 62dbd35b1ff6bf0304a3d79c, error: Error adding External Input:-2

Terminal

[erizo-516952bb-3344-e678-a6e6-1193416cd74d] 2022-07-26 09:59:36.052  - INFO: ErizoJSController - Start checking uptime, interval 1800
[erizo-516952bb-3344-e678-a6e6-1193416cd74d] 2022-07-26 09:59:36.052  - INFO: Client - Constructor Client file:///opt/licode/video/2.mkv, singlePC: false, strategy: false  
2022-07-26 09:59:36.053  - INFO: Client - Trying to set undefined strategy Id false, reverting to default algorithm
[erizo-516952bb-3344-e678-a6e6-1193416cd74d] 2022-07-26 09:59:36.053  - WARN: Publisher - message: Adding ExternalInput, id: 621007416545054700_file:///opt/licode/video/2.mkv, url: file:///opt/licode/video/2.mkv
[erizo-516952bb-3344-e678-a6e6-1193416cd74d] [matroska,webm @ 0x4a01760] Unknown entry 0x55B0
[erizo-516952bb-3344-e678-a6e6-1193416cd74d] 2022-07-26 09:59:36.057  - INFO: Client - message: Adding connection to Client, clientId: file:///opt/licode/video/2.mkv, connectionId: undefined,  
[erizo-516952bb-3344-e678-a6e6-1193416cd74d] 2022-07-26 10:00:56.752  - INFO: ErizoJSController - message: requested removeClient, clientId: aebddacb-8ca4-4267-85e5-21ad444609ff
[erizo-516952bb-3344-e678-a6e6-1193416cd74d] 2022-07-26 10:00:56.752  - INFO: ErizoJSController - message: removeClient - client is not present in this ErizoJS, clientId: aebddacb-8ca4-4267-85e5-21ad444609ff

[Arri98]

The mkv container is not being able to open the file. If you have ffmpeg installed try to encode the video with the following command ffmpeg -i INPUTFILE -c:a libopus -g 50 -c:v vp8 -b:a 48k out.mkv

Like I commented in the rtsp issue, publish the stream with one client and subscribe to it from another client as the publisher can not subscribe to its own stream.