org.mobicents.media.server.impl.resource.video
Class MediaDataBox

java.lang.Object
  org.mobicents.media.server.impl.resource.video.Box
      org.mobicents.media.server.impl.resource.video.MediaDataBox

public class MediaDataBox
extends Box

8.1.1.1 Definition

• Box Type: ‘mdat’
• Container: File
• Mandatory: No
• Quantity: Any number

This box contains the media data. In video tracks, this box would contain video frames. A presentation may contain zero or more Media Data Boxes. The actual media data follows the type field; its structure is described by the metadata (see particularly the SampleTableBox, subclause 8.5, and the item location box, subclause 8.11.3).

In large presentations, it may be desirable to have more data in this box than a 32-bit size would permit. In this case, the large variant of the size field, above in subclause 6.2, is used.

There may be any number of these boxes in the file (including zero, if all the media data is in other files). The metadata refers to media data by its absolute offset within the file (see subclause 8.7.5, the Chunk Offset Box); so Media Data Box headers and free space may easily be skipped, and files without any box structure may also be referenced and used.

Author:

amit bhayani

Field Summary

Fields inherited from class org.mobicents.media.server.impl.resource.video.Box

bytetoTypeMap

Constructor Summary

MediaDataBox(long size)

Method Summary

protected int

load(java.io.DataInputStream fin) Loads Box from stream.

Methods inherited from class org.mobicents.media.server.impl.resource.video.Box

comparebytes, getSize, getType, read, read16, read24, read32, readFixedPoint1616, readText, readType, readU32, readU64

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MediaDataBox

public MediaDataBox(long size)

Method Detail

load

protected int load(java.io.DataInputStream fin)
            throws java.io.IOException

Description copied from class: Box

Loads Box from stream.

Specified by:

load in class Box

Parameters:

fin - the stream to load box from

Returns:

the number of bytes readed from stream; *

Throws:

java.io.IOException - if some I/O error occured.