@netless/sync-player

SyncPlayer

Plays multiple media(videos or whiteboards) at the same time with synchronized progress and speed. Stops when the longest media ended.

Overview

• AtomPlayer: Abstract class for anything that is playable.
  • VideoPlayer: For videojs supported media.
  • WhiteboardPlayer: For Netless Whiteboard replay room.
  • OffsetPlayer: Add blank offset before an AtomPlayer.
  • SelectionPlayer: Cherry-pick segments of an AtomPlayer.
  • SyncPlayer: Play groups of AtomPlayers at the same time with synchronized progress and speed.

Install

npm add @netless/sync-player

Usage

You may clone this repo and run the dev example.

Basic

import videojs from "video.js";
import { VideoPlayer, SyncPlayer, OffsetPlayer } from "@netless/sync-player";

const player1 = new VideoPlayer({ video: videojs("#video1"), name: "video1" });
const player2 = new VideoPlayer({ video: videojs("#video2"), name: "video2" });

const syncPlayer = new SyncPlayer({ players: [player1, player2] });

syncPlayer.play();

Offset

You may add a time offset before any AtomPlayer:

const video = videojs("#video1");
const videoPlayer = new VideoPlayer({ video, name: "video1" });

// wait 3s before actually playing
const offsetPlayer = new OffsetPlayer({ offset: 3000, player: videoPlayer });

// add css to hide the video element
video.toggleClass("hidden", !player.visible);
offsetPlayer.on("visibilitychange", () => {
    video.toggleClass("hidden", !player.visible);
});

Selection Player

You may trim any AtomPlayer to selected parts by providing a selection list.

const video = videojs("#video1");
const videoPlayer = new VideoPlayer({ video, name: "video1" });
console.log(videoPlayer.duration); // let's say it's 15000

const selectionPlayer = new SelectionPlayer({
    player: videoPlayer,
    selectionList: [
        { start: 0, duration: 1000 },
        { start: 3000, duration: 9000 },
    ],
});
console.log(selectionPlayer.duration); // 7000

Sync With Netless Whiteboard

Sync videos with Netless Whiteboard Replay.

import videojs from "video.js";
import { VideoPlayer, WhiteboardPlayer, SyncPlayer, OffsetPlayer } from "@netless/sync-player";

const videoPlayer1 = new VideoPlayer({ video: videojs("#video1"), name: "video1" });
const videoPlayer2 = new VideoPlayer({ video: videojs("#video2"), name: "video2" });

const sdk = new WhiteWebSdk({ ... });
const room = await sdk.replayRoom({ ... });
room.bindHtmlElement(el);
const whiteboardPlayer = new WhiteboardPlayer({ player: room });

const syncPlayer = new SyncPlayer({ players: [videoPlayer1, videoPlayer2, whiteboardPlayer] });

syncPlayer.play();

API

play

syncPlayer.play();

pause

syncPlayer.pause();

stop

syncPlayer.stop();

seek

syncPlayer.seek(200);

duration

Duration(in millisecond) of the longest media.

console.log(syncPlayer.duration);

syncPlayer.on("durationchange", () => {
    console.log(syncPlayer.duration);
});

currentTime

Player progress time(in millisecond).

console.log(syncPlayer.currentTime);

syncPlayer.seek(1000);

syncPlayer.on("timeupdate", () => {
    console.log(syncPlayer.currentTime);
});

status

Player status.

• Pause Player paused by user invoking player.pause().
• Ready Player paused by controller.
• Buffering Player is buffering.
• Playing Player is playing.
• Ended Player ends.

// Ready | Pause | Buffering | Playing | Ended
console.log(syncPlayer.status);

syncPlayer.on("status", () => {
    console.log(syncPlayer.status);
});

playbackRate

0~1. Playback speed, or rate, of a player.

console.log(syncPlayer.playbackRate);
syncPlayer.setPlaybackRate(0.5);

syncPlayer.on("ratechange", () => {
    console.log(syncPlayer.playbackRate);
});

visible

A hint for visibility changes for OffsetPlayer. player.visible is false when currentTime is within the offset.

console.log(syncPlayer.visible);

syncPlayer.on("visibilitychange", () => {
    console.log(syncPlayer.visible);
});