DivX
From DigiWiki
The DivX codec is based on MPEG-4 video compression standard, designed primarily for video transfer over low to mid bandwidth networks (eg. Internet, WAP ...).
There are in fact 3 major versions of the codec, all name DivX.
The oldest version, a hacked version of Microsoft's MPEG-4 V3 implementation, is often referred to as the "DivX ;-) Codec". The hacked nature of the codec means it's legality has always been in question. The version number used is DivX 3.x.
Project Mayo was an open-source project started to replace DivX ;-) 3.x with a legal, developed from scratch version of the codec, OpenDivX.
The work done during Project Mayo allowed DivX for Windows/Linux/Mac/... to be produced. It is a commercial development, with free versions of the codec available for basic playback and encoding, and a paid for version with more advanced features. The version numbering started at 4.0 and is now in version 6.x.
From the same Project Mayo code source, the XviD codec was also released as an open source alternative to DivX.
Contents |
[edit] DivX Timeline
| 1998 | Microsoft's MPEG-4 V3 codec is hacked by Gej to allow all encoding modes, and released as the DivX ;-) Codec |
|---|---|
| April 2000 | DivX ;-) Codec 3.11 Alpha released - this would be the last release of the original "hacked" DivX ;-) Codec |
| June 2000 | DivX Digest launched! One of the first, if not the first, website dedicated to DivX. |
| January 2001 | DivX Scene Detect Patch for DivX ;-) Codec released, allowing automated scene detection and keyframe insertion |
| January 2001 | OpenDivX (DivX Deux) made available to the public to signal the release of the first completely legal version of the DivX codec |
| July 2001 | DivX 4.0 Beta released by DivXNetworks (now known as DivX Inc.) |
| August 2001 | DivX 4.0 Gold/Final released |
| March 2002 | DivX 5.0 released |
| June 2005 | DivX 6.0 released |
[edit] Profiles
| Handheld | Portable | Home Theater | High Def | |||
|---|---|---|---|---|---|---|
| Version | 5+ | 3.11 | 4+ | 3.11+ | 4+ | |
| Max. resolution | (px×px×Hz) | 176×144×15 | 352×240×30, 352×288×25 | 720×480×30, 720×576×25 | 720×480×30, 720×576×25 | 1280×720×30; 6.5: 1920×1080×30 |
| Macroblocks | (kHz) | 1.485 | 9.9 | 40.5 | 40.5 | 108 |
| Max. average bitrate | (Mbps) | 0.2 | 0.768 | 4 | 4 | 4 |
| Max. peak bitrate | (Mbps) | 0.4 | 2 | 8 | 8 | 20 |
| Min. VBV buffer size | (KiB) | 32 | 128 | 384 | 384 | 768 |
[edit] See Also
[edit] Digital Digest Links:
[edit] External Links:
[edit] NOTES
Profile table Design courtesy of Crissov
