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* use a new silent frame insert algorithm for audio remux.
the old algorithm cannot cover some common situation, like:
1. audio frame dts does not increase by a standard duration, sometimes it increase for a large duration(more than 1.5 * refSampleDuration), sometimes it increase for a small duration. But the average duration is more or less to refSampleDuration. the old algorithm would insert silent frames which result into video/audio unsync.
2. for network living stream, because of network jitter or frame lost, the encoder would generate the audio frames whose dts is not correct. but if the gap between two adjacent frame is not over 1.5 * refSampleDuration and the accumulate gap would become larger and larger. the old algorithm never insert silent frames for this case.

* initialize _audioNextRefDts when seeking

* fix: lint error

* test

* fix a curRefDts update mistake

* reuse some original variable which has the same meaning

* fix some variable mistake

* bug fix: incorrect byte length

Co-authored-by: xiaosong <kunkkaco@gmail.com>
Co-authored-by: wangjiankai <wangjiankai@cmhi.chinamobile.com>
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flv.js npm

An HTML5 Flash Video (FLV) Player written in pure JavaScript without Flash. LONG LIVE FLV!

This project relies on Media Source Extensions to work.

For FLV live stream playback, please consider mpegts.js which is under active development.

This project will become rarely maintained.

Overview

flv.js works by transmuxing FLV file stream into ISO BMFF (Fragmented MP4) segments, followed by feeding mp4 segments into an HTML5 <video> element through Media Source Extensions API.

flv.js is written in ECMAScript 6, transpiled into ECMAScript 5 by Babel Compiler, and bundled with Browserify.

Demo

http://bilibili.github.io/flv.js/demo/

Features

  • FLV container with H.264 + AAC / MP3 codec playback
  • Multipart segmented video playback
  • HTTP FLV low latency live stream playback
  • FLV over WebSocket live stream playback
  • Compatible with Chrome, FireFox, Safari 10, IE11 and Edge
  • Extremely low overhead, and hardware accelerated by your browser!

Installation

npm install --save flv.js

Build

npm install          # install dev-dependences
npm install -g gulp  # install build tool
gulp release         # packaged & minimized js will be emitted in dist folder

cnpm mirror is recommended if you are in Mainland China.

CORS

If you use standalone video server for FLV stream, Access-Control-Allow-Origin header must be configured correctly on video server for cross-origin resource fetching.

See cors.md for more details.

Getting Started

<script src="flv.min.js"></script>
<video id="videoElement"></video>
<script>
    if (flvjs.isSupported()) {
        var videoElement = document.getElementById('videoElement');
        var flvPlayer = flvjs.createPlayer({
            type: 'flv',
            url: 'http://example.com/flv/video.flv'
        });
        flvPlayer.attachMediaElement(videoElement);
        flvPlayer.load();
        flvPlayer.play();
    }
</script>

Limitations

  • MP3 audio codec is currently not working on IE11 / Edge
  • HTTP FLV live stream is not currently working on all browsers, see livestream.md

Multipart playback

You only have to provide a playlist for MediaDataSource. See multipart.md

Livestream playback

See livestream.md

API and Configuration

See api.md

Debug

npm install          # install dev-dependences
npm install -g gulp  # install build tool
npm run dev          # with incremental compile and auto reload

Design

See design.md

License

Copyright (C) 2016 Bilibili. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.