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# m3u8-parser
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m3u8 parser
<!-- START doctoc generated TOC please keep comment here to allow auto update -->
<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
- [Installation](#installation)
- [Usage](#usage)
- [Constructor Options](#constructor-options)
- [Parsed Output](#parsed-output)
- [Supported Tags](#supported-tags)
- [Basic Playlist Tags](#basic-playlist-tags)
- [Media Segment Tags](#media-segment-tags)
- [Media Playlist Tags](#media-playlist-tags)
- [Main Playlist Tags](#main-playlist-tags)
- [Experimental Tags](#experimental-tags)
- [EXT-X-CUE-OUT](#ext-x-cue-out)
- [EXT-X-CUE-OUT-CONT](#ext-x-cue-out-cont)
- [EXT-X-CUE-IN](#ext-x-cue-in)
- [Not Yet Supported](#not-yet-supported)
- [Custom Parsers](#custom-parsers)
- [Including the Parser](#including-the-parser)
- [`<script>` Tag](#script-tag)
- [Browserify](#browserify)
- [RequireJS/AMD](#requirejsamd)
- [License](#license)
<!-- END doctoc generated TOC please keep comment here to allow auto update -->
## Installation
```sh
npm install --save m3u8-parser
```
The npm installation is preferred, but Bower works, too.
```sh
bower install --save m3u8-parser
```
## Usage
```js
var manifest = [
'#EXTM3U',
'#EXT-X-VERSION:3',
'#EXT-X-TARGETDURATION:6',
'#EXT-X-MEDIA-SEQUENCE:0',
'#EXT-X-DISCONTINUITY-SEQUENCE:0',
'#EXTINF:6,',
'0.ts',
'#EXTINF:6,',
'1.ts',
'#EXT-X-PROGRAM-DATE-TIME:2019-02-14T02:14:00.106Z'
'#EXTINF:6,',
'2.ts',
'#EXT-X-ENDLIST'
].join('\n');
var parser = new m3u8Parser.Parser();
parser.push(manifest);
parser.end();
var parsedManifest = parser.manifest;
```
### Constructor Options
The constructor optinally takes an options object with two properties. These are needed when using `#EXT-X-DEFINE` for variable replacement.
```js
var parser = new m3u8Parser.Parser({
url: 'https://exmaple.com/video.m3u8?param_a=34&param_b=abc',
mainDefinitions: {
param_c: 'def'
}
});
```
* `options.url` _string_ The URL from which the playlist was fetched. If the request was redirected this should be the final URL. This is required if using `QUERYSTRING` rules with `#EXT-X-DEFINE`.
* `options.mainDefinitions` _object_ An object of definitions from the main playlist. This is required if using `IMPORT` rules with `#EXT-X-DEFINE`.
### Parsed Output
The parser ouputs a plain javascript object with the following structure:
```js
Manifest {
allowCache: boolean,
endList: boolean,
mediaSequence: number,
dateRanges: [],
discontinuitySequence: number,
playlistType: string,
custom: {},
playlists: [
{
attributes: {},
Manifest
}
],
mediaGroups: {
AUDIO: {
'GROUP-ID': {
NAME: {
default: boolean,
autoselect: boolean,
language: string,
uri: string,
instreamId: string,
characteristics: string,
forced: boolean
}
}
},
VIDEO: {},
'CLOSED-CAPTIONS': {},
SUBTITLES: {}
},
dateTimeString: string,
dateTimeObject: Date,
targetDuration: number,
totalDuration: number,
discontinuityStarts: [number],
segments: [
{
title: string,
byterange: {
length: number,
offset: number
},
duration: number,
programDateTime: number,
attributes: {},
discontinuity: number,
uri: string,
timeline: number,
key: {
method: string,
uri: string,
iv: string
},
map: {
uri: string,
byterange: {
length: number,
offset: number
}
},
'cue-out': string,
'cue-out-cont': string,
'cue-in': string,
custom: {}
}
]
}
```
## Supported Tags
### Basic Playlist Tags
* [EXTM3U](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.1.1)
* [EXT-X-VERSION](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.1.2)
### Media Segment Tags
* [EXTINF](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.2.1)
* [EXT-X-BYTERANGE](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.2.2)
* [EXT-X-DISCONTINUITY](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.2.3)
* [EXT-X-KEY](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.2.4)
* [EXT-X-MAP](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.2.5)
* [EXT-X-PROGRAM-DATE-TIME](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.2.6)
* [EXT-X-DATERANGE](https://datatracker.ietf.org/doc/html/draft-pantos-http-live-streaming-23#section-4.3.2.7)
* [EXT-X-I-FRAMES-ONLY](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.3.6)
### Media Playlist Tags
* [EXT-X-TARGETDURATION](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.3.1)
* [EXT-X-MEDIA-SEQUENCE](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.3.2)
* [EXT-X-DISCONTINUITY-SEQUENCE](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.3.3)
* [EXT-X-ENDLIST](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.3.4)
* [EXT-X-PLAYLIST-TYPE](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.3.5)
* [EXT-X-START](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.5.2)
* [EXT-X-INDEPENDENT-SEGMENTS](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.5.1)
* [EXT-X-DEFINE](https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis#section-4.4.2.3)
### Main Playlist Tags
* [EXT-X-MEDIA](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.4.1)
* [EXT-X-STREAM-INF](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.4.2)
* [EXT-X-I-FRAME-STREAM-INF](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.4.3)
* [EXT-X-CONTENT-STEERING](https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis#section-4.4.6.6)
* [EXT-X-DEFINE](https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis#section-4.4.2.3)
### Experimental Tags
m3u8-parser supports 3 additional **Media Segment Tags** not present in the HLS specification.
#### EXT-X-CUE-OUT
The `EXT-X-CUE-OUT` indicates that the following media segment is a break in main content and the start of interstitial content. Its format is:
```
#EXT-X-CUE-OUT:<duration>
```
where `duration` is a decimal-floating-point or decimal-integer number that specifies the total duration of the interstitial in seconds.
#### EXT-X-CUE-OUT-CONT
The `EXT-X-CUE-OUT-CONT` indicates that the following media segment is a part of interstitial content and not the main content. Every media segment following a media segment with an `EXT-X-CUE-OUT` tag *SHOULD* have an `EXT-X-CUE-OUT-CONT` applied to it until there is an `EXT-X-CUE-IN` tag. A media segment between a `EXT-X-CUE-OUT` and `EXT-X-CUE-IN` segment without a `EXT-X-CUE-OUT-CONT` is assumed to be part of the interstitial. Its format is:
```
#EXT-X-CUE-OUT-CONT:<n>/<duration>
```
where `n` is a decimal-floating-point or decimal-integer number that specifies the time in seconds the first sample of the media segment lies within the interstitial content and `duration` is a decimal-floating-point or decimal-integer number that specifies the total duration of the interstitial in seconds. `n` *SHOULD* be the sum of `EXTINF` durations for all preceding media segments up to the `EXT-X-CUE-OUT` tag for the current interstitial. `duration` *SHOULD* match the `duration` specified in the `EXT-X-CUE-OUT` tag for the current interstitial.'
#### EXT-X-CUE-IN
The `EXT-X-CUE-IN` indicates the end of the interstitial and the return of the main content. Its format is:
```
#EXT-X-CUE-IN
```
There *SHOULD* be a closing `EXT-X-CUE-IN` tag for every `EXT-X-CUE-OUT` tag. If a second `EXT-X-CUE-OUT` tag is encountered before an `EXT-X-CUE-IN` tag, the client *MAY* choose to ignore the `EXT-X-CUE-OUT` and treat it as part of the interstitial, or reject the playlist.
Example media playlist using `EXT-X-CUE-` tags.
```
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:10
#EXTINF:10,
0.ts
#EXTINF:10,
1.ts
#EXT-X-CUE-OUT:30
#EXTINF:10,
2.ts
#EXT-X-CUE-OUT-CONT:10/30
#EXTINF:10,
3.ts
#EXT-X-CUE-OUT-CONT:20/30
#EXTINF:10,
4.ts
#EXT-X-CUE-IN
#EXTINF:10,
5.ts
#EXTINF:10,
6.ts
#EXT-X-ENDLIST
```
### Not Yet Supported
* [EXT-X-SESSION-DATA](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.4.4)
* [EXT-X-SESSION-KEY](http://tools.ietf.org/html/draft-pantos-http-live-streaming#section-4.3.4.5)
### Custom Parsers
To add a parser for a non-standard tag the parser object allows for the specification of custom tags using regular expressions. If a custom parser is specified, a `custom` object is appended to the manifest object.
```js
const manifest = [
'#EXTM3U',
'#EXT-X-VERSION:3',
'#VOD-FRAMERATE:29.97',
''
].join('\n');
const parser = new m3u8Parser.Parser();
parser.addParser({
expression: /^#VOD-FRAMERATE/,
customType: 'framerate'
});
parser.push(manifest);
parser.end();
parser.manifest.custom.framerate // "#VOD-FRAMERATE:29.97"
```
Custom parsers may additionally be provided a data parsing function that take a line and return a value.
```js
const manifest = [
'#EXTM3U',
'#EXT-X-VERSION:3',
'#VOD-FRAMERATE:29.97',
''
].join('\n');
const parser = new m3u8Parser.Parser();
parser.addParser({
expression: /^#VOD-FRAMERATE/,
customType: 'framerate',
dataParser: function(line) {
return parseFloat(line.split(':')[1]);
}
});
parser.push(manifest);
parser.end();
parser.manifest.custom.framerate // 29.97
```
Custom parsers may also extract data at a segment level by passing `segment: true` to the options object. Having a segment level custom parser will add a `custom` object to the segment data.
```js
const manifest = [
'#EXTM3U',
'#VOD-TIMING:1511816599485',
'#EXTINF:8.0,',
'ex1.ts',
''
].join('\n');
const parser = new m3u8Parser.Parser();
parser.addParser({
expression: /#VOD-TIMING/,
customType: 'vodTiming',
segment: true
});
parser.push(manifest);
parser.end();
parser.manifest.segments[0].custom.vodTiming // #VOD-TIMING:1511816599485
```
Custom parsers may also map a tag to another tag. The old tag will not be replaced and all matching registered mappers and parsers will be executed.
```js
const manifest = [
'#EXTM3U',
'#EXAMPLE',
'#EXTINF:8.0,',
'ex1.ts',
''
].join('\n');
const parser = new m3u8Parser.Parser();
parser.addTagMapper({
expression: /#EXAMPLE/,
map(line) {
return `#NEW-TAG:123`;
}
});
parser.addParser({
expression: /#NEW-TAG/,
customType: 'mappingExample',
segment: true
});
parser.push(manifest);
parser.end();
parser.manifest.segments[0].custom.mappingExample // #NEW-TAG:123
```
## Including the Parser
To include m3u8-parser on your website or web application, use any of the following methods.
### `<script>` Tag
This is the simplest case. Get the script in whatever way you prefer and include it on your page.
```html
<script src="//path/to/m3u8-parser.min.js"></script>
<script>
var parser = new m3u8Parser.Parser();
</script>
```
### Browserify
When using with Browserify, install m3u8-parser via npm and `require` the parser as you would any other module.
```js
var m3u8Parser = require('m3u8-parser');
var parser = new m3u8Parser.Parser();
```
With ES6:
```js
import { Parser } from 'm3u8-parser';
const parser = new Parser();
```
### RequireJS/AMD
When using with RequireJS (or another AMD library), get the script in whatever way you prefer and `require` the parser as you normally would:
```js
require(['m3u8-parser'], function(m3u8Parser) {
var parser = new m3u8Parser.Parser();
});
```
## License
Apache-2.0. Copyright (c) Brightcove, Inc
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