mp4.js

mp4 parser and composer.

Hige level API

Mp4.parse

var tree = Mp4.parse(u8arr);
Array.isArray(tree);

Mp4.extractAudio

var m4aBytes = Mp4.extractAudio(u8arr);

Mp4.extractRawAudio

var audio = Mp4.extractRawAudio(u8arr);
audio.type; // 'aac' or 'mp3'
audio.data; // audio data as Uint8Array

Mp4.aacToM4a

var m4aBytes = Mp4.aacToM4a(aacBytes);

utils

Mp4.DataView2

A DataView wrapper.

var v1 = new Mp4.DataView2(new ArrayBuffer(100));
var v3 = new Mp4.DataView2(100);
var v2 = new Mp4.DataView2(new Uint8Array([1, 2, 3, 4]));

Mp4.Finder

var tree = Mp4.parse(u8arr);
var finder = new Mp4.Finder(tree);
var ftyp = finder.findOne(Mp4.BOX_TYPE_FILE_TYPE_BOX);
var traks = new finder.findAll(Mp4.BOX_TYPE_TRACK_BOX);

Mp4.BitReader

var bitReader = new Mp4.BitReader(u8arr);
bitReader.readBits(2);
bitReader.bitOffset === 2;
bitReader.skipBits(6);

Mp4.BitWriter

todo