Class Summary |
AbstractMp4Box |
Abstract mp4 box, contain a header and then rawdata (which may include child boxes) |
Mp4BoxHeader |
Everything in MP4s are held in boxes (formally known as atoms), they are held as a hierachial tree within the MP4. |
Mp4DrmsBox |
DrmsBox Replaces mp4a box on drm files
Need to skip over data in order to find esds atom
Specification not known, so just look for byte by byte 'esds' and then step back four bytes for size |
Mp4EsdsBox |
EsdsBox ( stream specific description box), usually holds the Bitrate/No of Channels
It contains a number of (possibly optional?) sections (section 3 - 6) (contaning optional filler) with
differeent info in each section. |
Mp4FreeBox |
FreeBox ( padding) |
Mp4MdhdBox |
MdhdBox ( media (stream) header), holds the Sampling Rate used. |
Mp4MetaBox |
This MP4MetaBox is the parent of metadata, it also contains a small amount of data
that needs to be processed before we can examine the children |
Mp4Mp4aBox |
Mp4aBox ( sample (frame encoding) description box)
At first glance appears to hold no of channels but actually always returns 2 even for mono recordings
so just need to skip over data in order to get to child atom esds |
Mp4MvhdBox |
MvhdBox (movie (presentation) header box) |
Mp4StcoBox |
StcoBox ( media (stream) header), holds offsets into the Audio data |
Mp4StsdBox |
StsdBox ( sample (frame encoding) description box) |