How to add MOOV atom to mp4?

[hypo-thesis]

I need an example where I can add MOOV atom to an arraybuffer. Thanks.

[hughfenghen]

file.addTrack will create moov box.

const moovBox = file.boxes.find(({type}) => type === 'moov')

const ds = new mp4box.DataStream()
ds.endianness = mp4box.DataStream.BIG_ENDIAN
moovBox.write(ds)

// ds.buffer  is moov box binary data