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MPEG4 Modifier modifies a MPEG-4 ASP video (XviD, DivX) without re-encoding (change aspect ratio, edit userdata, remove or add packed bitstream, and change interlaced field order). It can also show information about the video such as the amount of I/P/S/B-VOPs used, whether or not QPel/GMC were used, etc. Requires .NET Framework 2.0.

Free software
Win Win

Version:1.4.5 History
Released:

Size:30kB

Portable version



9.2/10
11 votes


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  Latest version:
1.4.5 (September 02, 2012)


Download sites:
Visit developer's site

Download MPEG4 Modifier 1.4.5 (direct link) (30kB) (Portable)


More download options:


Download MPEG4 Modifier old versions:


Supported operating systems:
Windows


More information and other downloads:
Download MPEG4Modifier CLI/Command line version here


Sections/Browse similar tools:
Codec/Video IdentifiersVideo Repair/Fix

MPEG4 Modifier screenshot
Click to enlarge screenshot

User options:
Email me when it has been updated    Report this tool (dead link/new version)  


Version history / Release notes / Changelog:
1.4.5 (2012-Sep-02):

Ability to export custom quantization matrix to .cqm file.
Fixed window layout with high DPI settings.
Supports loading on .NET 4.x runtime (not required; still 2.0 compatible).

View full changelog






Guides and How to's:
No guides/tutorials, submit guides here.



Acronyms / Also Known As:
MPEG4 Modifier, MPEG4Modifier, mpeg modifier, mpegmodifier

Comments Post comment
11 comments, Showing 1 to 11 comments
 - 

This tool is just what I've been looking for
one thing is there a way to use batch when processing multi files?



Posted September 14, 2014 by . Tool version 1.4.5 using OS Windows 7 64-bit
Ease of use 10 of 10 Functionality 6 of 10 Value for money 10 of 10 Overall score 8 of 10


this is a great tool, the only bad thing is that... I,m having trouble with avi high definition files.
they have more then 2 gigabytes, and I don,t think this tool supportīs it.

my files are usually in 720p resolution, e use divx plus converter to convert my mkv ( h264 )
to avi ( divx + ac3 or mp3 sound )
because my memup media player only supportīs avi hd files ( xvid or divx )
it doesn't supports h264

and i hould like to change the aspect ratio to 16:9 in ( avi hd )
but the tool gives me a error...

on regular 700mb, standard resolution avi files the program works fine.

i hope that someone improve this program, to keep track of modern high definition files.

xvid or divx support today up to 1920x1080 resolution, itīs a bloody shame, to see a movie with an aspect ratio of 2.35.1 in a 16:9 TV ( I see it, with black bars )

if the avi is on standard size and resolution I can easily change to full-screen 16:9
go to " display ar" choose 16:9 and click save file :-) ( no black bars )

this is a one of kind tool, congratulations to the author



Posted December 09, 2011 by . Tool version v1.4.4 using OS Vista
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


This tool does have a CLI version so you can easily create a batch file and process
as many as you'd like. Check http://forum.doom9.org/showthread.php?t=117553



Posted November 16, 2011 by . Tool version 1.4.4 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 main drawback is lack of queue function. Would be great to process hundreds of videos with one click, now each video mus be loaded separately. But anyway very useful tol.


Posted November 16, 2011 by . Tool version 1.2 using OS WinXP
Ease of use 8 of 10 Functionality 6 of 10 Value for money 10 of 10 Overall score 8 of 10


I tried so many programs like abcavi to correct the aspect ratio of a downloaded avi file but without any success. Then I stumbled upon Mp4modifier and it did in 2 seconds flat what I have been trying for so many days. Just great.


Posted July 24, 2008 by . Tool version 1.4.4 using OS WinXP
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


i used it to change the aspect ratio of an XVID AVI - just clicked on the aspect ratio i wanted it to be, & name of file to save it as, little progress bar took less than a minute. worked great. im presuming the unpacking of the bitstream would be just as easy. great stuff, does exactly what I wanted it to. Thanks.


Posted July 18, 2008 by . Tool version 1.4.4 using OS WinXP
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


I want to thank the authors of this MPEG4Modifier for solving my problem. I had an AVI in an incorrect aspect ratio. I used VLC and modified the playback until I found an acceptable aspect ratio, the download and ran this tool and it quickly created a version of the file that works perfectly. Thank you.


Posted October 17, 2007 by . Tool version 1.4.4 using OS Vista
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


Tried using this program with the hope I could change the FPS without having to reencode. Unfortunately, the options are pretty limited and basic, so I wasn't able to use it to achieve the FPS I wanted. It would be a great help if the program offered more flexibility, such as an option to switch to other frame rates like 23.976.

Still, the program is useful and it works.



Posted December 08, 2006 by . Tool version 1.4.3 using OS WinXP
Ease of use 9 of 10 Functionality 7 of 10 Value for money 10 of 10 Overall score 8 of 10


I use this tool primarily for the purpose of making TV Eps compliant with my Zensonic DVD/MPEG4 player.

While MPEG4 Modifier is absolutely indispensable, in my view it has a couple of shortcomings, and could do with a simple cosmetic (and ergonomic) enhancement.

Shortcomings:
1: To determine if audio is not correctly aligned with video frames, I have to use Gspot. If the Audio needs re-alignment I have to use AVIMux_GUI to correct it. Would it be possible to have MPEG4 Modifier add this funcionality as a feature?
2: MPRG4 Modifier shows if an AVI has GMC or Qpel. If it does, I have to re-encode the episode so it becomes Standalone MPEG4 player compliant. Are there any plans to add the ability to fix the GMC and Qpel problem within MPEG4 Modifier?

Enhancement:
It's just a little thing, but considering the amount of screen real estate available these days, why have the "Video Info" as a separate popup? There's not that much info there that it couldn't be all on the first screen. It would be much more convenient!

The author has no way to contact him to make suggestions. I hope he reads these comments.

Thanks for a really useful utility.



Posted February 26, 2005 by . Tool version v1.31 using OS WinXP
Ease of use 8 of 10 Functionality 7 of 10 Value for money 10 of 10 Overall score 8 of 10


Excellent program for unpacking avi files.

As mentioned previously, version 1.2.0 seemed to have a couple of issues, leaving 1.1.0 being the choice for most. However, the latest version seems to be stable, and very slick with its new progress bar.



Posted January 29, 2005 by . Tool version 1.3.1 using OS WinXP
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


been using this (version 1.2.0) to unpack bitstreams on xvids for use on my yamada 6600 player, which cause jumpy playback, does this very well indeed and is a simple process check the bix and change the "p" to a "n" in the user data box by clicking edit and resaving the file 5minute job, only problem is with this version its gives me a no dummy n-vop error message aobut 50% of the time, so i have to go back to using version 1.1.0 whic is why i rate it 5 for functionality but over all between the 2 versions ive been able to get the job done 100% of the time


Posted November 20, 2004 by . Tool version 1.2.0 using OS WinXP
Ease of use 10 of 10 Functionality 5 of 10 Value for money 10 of 10 Overall score 8 of 10

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