OpenDML AVI File Format Extensions
Version 1.02
OpenDML AVI M-JPEG File Format Subcommittee
Last revision: February 28, 1996
Reformatting: September 1997
Please note
The information provided by this document is provided on an "as is" basis. No responsibility is assumed
by Matrox Electronic Systems Ltd. for its use; nor for any infringements of patents or other rights of third
parties resulting from its use. No license is granted under any patents or patent rights of Matrox
Electronic Systems Ltd.
i
Table of Contents
Table of Contents
1.0 Introduction
...............................................................................................................................
1
Scope
......................................................................................................................................
1
OpenDML Sub-Committee on File Format: High Level Goals
..................................................
1
Version History
.......................................................................................................................
1
1.0 Overview of Profession Video Requirements
............................................................................
2
Goal
........................................................................................................................................
2
Issues
......................................................................................................................................
2
AVI: Support Current AVI Format
......................................................................................
2
60 Fields Per Second vs. 30 Frames Per Second; or 24 Frames Per Second For Film
.............
2
Improved Tombstone and Header Information
......................................................................
2
2.0 Increased AVI File Size
.............................................................................................................
3
Introduction: RIFF Chunk Format
............................................................................................
3
Increased File Size Limits (>> 1 GB)
.......................................................................................
3
Extension for File Size > 1 GB
................................................................................................
3
3.0 Frame and Field Indexing
..........................................................................................................
5
Introduction: ‘idx1’ Index Chunk
.............................................................................................
5
Issues
......................................................................................................................................
5
Allow Field Indexing
............................................................................................................
5
Allow Incremental Growth of Files
.......................................................................................
5
Minimize Disk Seeks
...........................................................................................................
5
Proposed Index List
.................................................................................................................
6
Overview
.............................................................................................................................
6
Base Index Form ‘indx’
.......................................................................................................
6
AVI Standard Index Chunk
..................................................................................................
7
AVI Field Index Chunk
........................................................................................................
8
AVI Super Index Chunk
......................................................................................................
9
Index Locations in RIFF File
.............................................................................................
10
4.0 Interleaving Audio with Video
................................................................................................
13
Issues
....................................................................................................................................
13
Interleaving Rate
...............................................................................................................
13
ii
Table of Contents
Single or Multiple Files for Video and Audio
......................................................................
13
Multiple Tracks of Audio Storage
......................................................................................
13
Mono and Stereo Audio
.....................................................................................................
13
Audio / Video Time Stamping (Sync Point List)
.................................................................
13
Notes on Interleaving Audio and Video
..................................................................................
13
5.0 Source and Header Information Storage
....................................................................................
15
Goal
......................................................................................................................................
15
Required Information
.............................................................................................................
15
Main AVI Header (avih)
....................................................................................................
15
AVI Stream Header (strh)
..................................................................................................
15
AVI Stream Format (strf)
..................................................................................................
16
Extended AVI Header (dmlh)
.............................................................................................
16
Video Properties Header (vprp)
..........................................................................................
16
Source and Timecode Information
......................................................................................
20
Film Transfer Log Information
...........................................................................................
22
Microsoft-Defined Tombstone Data
.......................................................................................
23
6.0 Other File Issues
......................................................................................................................
28
Issues
....................................................................................................................................
28
Continuation Over Multiple Files
.......................................................................................
28
Minimized Time to Open Files
...........................................................................................
28
Simultaneous Reading and Writing / Multiple Access
.........................................................
28
7.0 MJPG Motion JPEG DIB Extensions
.....................................................................................
30
Issues
....................................................................................................................................
30
ISO vs. Non ISO Formats
..................................................................................................
30
8-bit vs. 10-bit YUV
..........................................................................................................
30
Video vs. Bitmap
...............................................................................................................
30
Proposed Data Chunk Format
................................................................................................
30
From the DIB spec:
............................................................................................................
30
And a new proposal:
..........................................................................................................
32
MJPEG Baseline DCT - YCbCr DIB Map
.........................................................................
33
Sector Alignment and Padding
...........................................................................................
34
8.0 OpenDML File Format Certification Procedures
...................................................................
36
Concurrently Develop a Test Suite to measure compatibility
..................................................
36
iii
Table of Contents
评论0