cs.iso14496 20190220

Facilities for ISO14496 files - the ISO Base Media File Format, the basis for several things including MP4 and MOV.

Facilities for ISO14496 files - the ISO Base Media File Format, the basis for several things including MP4 and MOV.

ISO make the standard available here:

• link
• link

Function add_body_class(klass)

Register a box body class in KNOWN_BOXBODY_CLASSES.

Function add_body_subclass(superclass, box_type, section, desc)

Create and register a new BoxBody class that is simply a subclass of another. Returns the new class.

Function add_generic_sample_boxbody(box_type, section, desc, struct_format_v0, sample_fields, struct_format_v1=None, has_inferred_entry_count=False)

Create and add a specific Time to Sample box - section 8.6.1.

Function add_time_to_sample_boxbody(box_type, section, desc)

Add a Time to Sample box - section 8.6.1.

Class Box

MRO: cs.binary.Packet, cs.binary.PacketField, abc.ABC
Base class for all boxes - ISO14496 section 4.2.

This has the following PacketFields:

• header: a BoxHeader
• body: a BoxBody instance, usually a specific subclass
• unparsed: if there are unconsumed bytes from the Box they are stored as here as a BytesesField; note that this field is not present if there were no unparsed bytes

Class BoxBody

MRO: cs.binary.Packet, cs.binary.PacketField, abc.ABC
Abstract basis for all Box bodies.

Class BoxHeader

MRO: cs.binary.Packet, cs.binary.PacketField, abc.ABC
An ISO14496 Box header packet.

Class BTRTBoxBody

MRO: BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
BitRateBoxBody - section 8.5.2.2.

Class CO64BoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'c064' Chunk Offset box - section 8.7.5.

Class ContainerBoxBody

MRO: BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A base class for pure container boxes.

Class CSLGBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'cslg' Composition to Decode box - section 8.6.1.4.

Class DINFBoxBody

MRO: BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'dinf' Data Information BoxBody - section 8.7.1.

Class DREFBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'dref' Data Reference box containing Data Entry boxes - section 8.7.2.1.

Function dump_box(B, indent='', fp=None, crop_length=170)

Recursively dump a Box.

Class ELNGBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A ELNGBoxBody is a Extended Language Tag box - ISO14496 section 8.4.6.

Class FREEBoxBody

MRO: BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'free' or 'skip' box - ISO14496 section 8.1.2. Note the length and discard the data portion.

Class FTYPBoxBody

MRO: BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
An 'ftyp' File Type box - ISO14496 section 4.3. Decode the major_brand, minor_version and compatible_brands.

Class FullBoxBody

MRO: BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A common extension of a basic BoxBody, with a version and flags field. ISO14496 section 4.2.

Class HDLRBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A HDLRBoxBody is a Handler Reference box - ISO14496 section 8.4.3.

Function main(argv)

Module main programme.

Class MDATBoxBody

MRO: BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A Media Data Box - ISO14496 section 8.1.1.

Class MDHDBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A MDHDBoxBody is a Media Header box - ISO14496 section 8.4.2.

Class METABoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'meta' Meta BoxBody - section 8.11.1.

Class MOOVBoxBody

MRO: ContainerBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
An 'moov' Movie box - ISO14496 section 8.2.1. Decode the contained boxes.

Class MVHDBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
An 'mvhd' Movie Header box - ISO14496 section 8.2.2.

Class OverBox

MRO: cs.binary.Packet, cs.binary.PacketField, abc.ABC
A fictitious Box encompassing all the Boxes in an input buffer.

Function parse(o, **kw)

Return an OverBox source (str, int, file).

Function parse_buffer(bfr, copy_offsets=None, **kw)

Parse an ISO14496 stream from the CornuCopyBuffer bfr, yield top level Boxes.

Parameters:

• bfr: a CornuCopyBuffer provided the stream data, preferably seekable
• discard_data: whether to discard unparsed data, default False
• copy_offsets: callable to receive Box offsets

Function parse_chunks(chunks, **kw)

Parse an ISO14496 stream from the iterator of data chunks, yield top level Boxes.

Parameters:

• chunks: an iterator yielding bytes objects
• discard_data: whether to discard unparsed data, default False
• copy_offsets: callable to receive BoxBody offsets

Function parse_fd(fd, discard_data=False, **kw)

Parse an ISO14496 stream from the file descriptor fd, yield top level Boxes. fd: a file descriptor open for read discard_data: whether to discard unparsed data, default False copy_offsets: callable to receive BoxBody offsets

Function parse_file(fp, **kw)

Parse an ISO14496 stream from the file fp, yield top level Boxes. fp: a file open for read discard_data: whether to discard unparsed data, default False copy_offsets: callable to receive BoxBody offsets

Class PDINBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
An 'pdin' Progressive Download Information box - ISO14496 section 8.1.3.

Function pick_boxbody_class(box_type, default_type=None)

Infer a Python BoxBody subclass from the bytes box_type.

• box_type: the 4 byte box type
• default_type: the default BoxBody subclass if there is no specific mapping, default None; if None, use BoxBody.

Class SMHDBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'smhd' Sound Media Headerbox - section 12.2.2.

Class STCOBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'stco' Chunk Offset box - section 8.7.5.

Class STSCBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
'stsc' (Sample Table box - section 8.7.4.1.

Class STSZBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'stsz' Sample Size box - section 8.7.3.2.

Class STZ2BoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'stz2' Compact Sample Size box - section 8.7.3.3.

Class SubBoxesField

MRO: cs.binary.ListField, cs.binary.PacketField, abc.ABC
A field which is itself a list of Boxes.

Class TKHDBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
An 'tkhd' Track Header box - ISO14496 section 8.2.2.

Class TrackGroupTypeBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A TrackGroupTypeBoxBody contains a track group id - ISO14496 section 8.3.3.2.

Class TrackReferenceTypeBoxBody

MRO: BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A TrackReferenceTypeBoxBody contains references to other tracks - ISO14496 section 8.3.3.2.

Class TREFBoxBody

MRO: ContainerBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
Track Reference BoxBody, container for trackReferenceTypeBoxes - ISO14496 section 8.3.3.

Class TTSB_Sample

MRO: builtins.tuple
TTSB_Sample(count, delta)

Class URL_BoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
An 'url ' Data Entry URL BoxBody - section 8.7.2.1.

Class URN_BoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
An 'urn ' Data Entry URL BoxBody - section 8.7.2.1.

Class VMHDBoxBody

MRO: FullBoxBody, BoxBody, cs.binary.Packet, cs.binary.PacketField, abc.ABC
A 'vmhd' Video Media Headerbox - section 12.1.2.