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3ivx is an MPEG-4 toolkit that supports MPEG-4 Video, MPEG-4 Audio and the MP4 file format. 3ivx allows video and audio to be compressed to a fraction of its original size while maintaining high image quality.

Trialware ($20)
File size:1MB
Old versions available
Version history available

8 votes

Read 8


  Latest version

5.0.4 (August 15, 2012)

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Download 3ivx 5.0.4 (direct link)

Download old versions

Download 3ivx old versions

Supported operating systems


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3ivx screenshot
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Version history / Release notes / Changelog

Technical Background Document:

3ivx MPEG-4 5.0.5

New Features

Now Mountain Lion compatible
Mountain Lion GateKeeper Support
Retina Display Support

QT Video Codec
Now compatible with Mountain Lion's QuickTime Player X (10.2)

QT Exporter
Added Retina Graphics
OS X Preference Pane
Added Retina Graphics
OS X Register Application
Added Retina Graphics
OS X Installer
Added Retina Graphics
Installation packages are now a flat package so they can be signed
Code-signed with 3ivx's developer license, which makes GateKeeper happy
Bugs Fixed

Fixed an incompatibility issue caused by Mountain Lion's sandbox protection

Missing Features
Interlaced decoding is not implemented for S-frames (GMC)
Permanent Issues
XviD streams prior to build0000 (ie up to and including 0.9 stable series) with non-multiples of 16 are not MPEG-4 compliant and exhibit occasional glitches. There is no work-around.
NVops (not coded PVops) can be used to more efficiently represent dropped frames or frames which are identical to the previous frame. NVops are not correctly handled by the QuickTime MPEG-4 Stream hinter and will cause a -5402 error when attempting to hint a file which contains NVops. The solution is to not use NVop coding. The 3ivx DirectShow Media Muxer can be used to remove NVops from an already coded bitstream. (This is currently still an issue with QT6.5)
As decoder delay has been reduced by 1 frame, if the clip playing does not correctly indicate low_delay field - the first B span will jitter.

QT Codec
QuickTime 7's native datarate setting is now in kilobits/sec. There are
1000 bits in a kilobit, and 1024 bytes in a kilobyte, according to the
QuickTime Player. Due to a work-around for an error in QT7's kilobit->byte conversion, third party applications which do not use the QT7 codec selection dialog to obtain a datarate from the user (in kilobits/sec) may end up undershooting by a factor 1.024 (roughly 2.5%). In order to correct for this multiply the datarate you enter into affected applications by 1.024. This is only an issue when using QT7.
Quicktime does not allow decoding GMC in mp4 files, error 2010 dialog would generally pop out
In certain versions of QuickTime Player, if using a CTTS enabled MP4 file, the first frame displayed will be black.
If the first frame produced is black, the last frame displayed will be mis-predicted.

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8 comments, Showing 1 to 5 comments

This IS a really good MPEG-4 Codec, it hasn't been updated in some time and is due for some tweaking, Quality wise I think it on par with DivX and I like it slightly better than XviD, it seems to have a little more detail in well lit scenes but can be very blocky in dark or foggy scenes (all MPEG-4 Codecs are to some degree though). The MPEG-4 toolkit is really useful if you take a little time to learn how to use GraphEdit. Where this codec really shines is in software realtime capture, this is usually an MPEG-4 taboo but this codec can yield great captures in CQ mode and doesn't need a lot of CPU to do it. It also is comfortable with both Mac and PC and works very well with Quicktime Pro.

Posted November 28, 2006 by GMaq. Tool version D4 4.5.1 (Jan 27, 2004) using OS WinXP
Ease of use 9 of 10 Functionality 10 of 10 Value for money 8 of 10 Overall score 9 of 10

A must have for Virtual Dub Mod and MPEG2 files. You'll also need to reduce yor video frame rate for HDTV recordings.

Posted November 27, 2006 by CHSReb. Tool version AC# ACM using OS WinXP
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10

The 3ivx codec pack does have certain limitations according to statements made on the 3ivx website as of 1/22/06. While the video does look very good, why do we need another f***in codec when Divx is clearly superior in popularity (eg. it would be better if we could just stick to just a few codecs - 3ivx, xVid, blaaa) and works great; if you want DVD quality buy a damn DVD!; coversion from 3ivx to other formats sucks - why would I want to convert to another format? - because flexibility is needed to convert to lesser bit rates for smaller file sizes or to more compatable formats for web streaming etc. The only media player that I could get to work with 3ivx with minimal effort was QuickTime 6.5 - and this prog blows.

Posted January 22, 2006 by x0r. Tool version 4.5 using OS WinXP
Ease of use 1 of 10 Functionality 1 of 10 Value for money 1 of 10 Overall score 1 of 10

Simply great. The best for real-time capturing.The quality

of video I captured is unmatched to any other codec avalable

in the market,while playing back captured video it looked as

if I have captured it uncompressed.

Posted December 11, 2003 by Ajit. Tool version 4.5 using OS Win98
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10

I saw this codec like 2 years ago and everything looked great. Way better than whatever DivX was out. I think only 3.11alpha. I posted on a couple boards and asked why no one was usuing the encoder but got ignored. Looks like they finally relased a final version of it! Looks awsome!

Posted December 06, 2003 by cegli. Tool version 1.00 using OS WinXP
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10

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