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My MP4Box GUI is a Graphical User Interface for the well-known command line tool mp4box. My MP4Box GUI, like mp4box, is freeware. MP4Box is an MP4 muxer. It can import MPEG-4 video (H.264 or ASP, encoded for example with x264, DivX, Xvid, 3ivx or FFmpeg) and audio streams into the MP4 container. The end result is ISO compliant MP4 streams. It can also produce MPEG-4 Timed Text streams by importing subtitles formats such as srt. It can also split MP4 files into sections, which can be useful when transferring files to portable media players. Join and Split.

File size:3.6MB
Old versions available
Version history available

17 votes

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  Latest version (January 04, 2013)

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Supported operating systems


My MP4Box GUI screenshot
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Version history / Release notes / Changelog - 2012/01/03

added grouping support for audio when using Apple Friendly v2
added ttxt, xml and ogm/ogg chapter support
Recommend using ttxt chapter files
when playback will be on Apple device.
updated various aspects of GUI
updated 'supported' files
updated track titling
View full changelog

All features / Full description

* Create mp4 files containing:
- video streams with m4v, cmp, h264, 264, h263, 263 as input format or from avi, mpg, mpeg, vob, mp4, mov, ogg, qcp and 3gp format.
- audio streams with aac, ac3, amr, awb, evc, mp3 as input format or from avi, mpg, mpeg, vob (mp2 only), mp4 and 3gp format.
- subtitle streams with srt, idx/sub and ttxt format.
* Add up to 20 tracks to an mp4 file.
* Delay every audio and/or video track separately.
* Change the framerate of added video.
* Save a list of jobs to be completed at a later date.
* Join supported files(mp4, 3gp) end-to-end aka concatenate joining.
* Demux supported files(mp4, avi, mov, ts, idx/sub, srt) to their raw formats.
* Hint tracks to ready for streaming.
* Split files by size or duration. eg. 700mb CDs or 60min

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Guides and How to's

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Acronyms / Also Known As

MyMP4BoxGUI, MyMP4Box GUI, mp4boxgui, mp4box gui

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18 comments, Showing 1 to 5 comments

Guide to use this program in English here:

and guide to use this program in Thai here:

Posted May 01, 2016 by RosalieFPigg. Tool version 0.6.06 using OS Windows 10 64-bit
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10

Worked flawlessly on Win7 for years until my upgrade to Win10 then it would not indicate if it was processing the file (demux/mux/join) or not, it will still display "Ready", otherwise it does complete the task. Just a minor glitch that could very well be due to Win10 and not the program itself since Win10 isn't nice to other software as well. Compatibility mode has no effect. Sad the developer has abandoned his fine program otherwise I'd gladly donate to support his efforts.

Posted April 12, 2016 by depamode. Tool version using OS Windows 10 64-bit
Ease of use 10 of 10 Functionality 2 of 10 Value for money 10 of 10 Overall score 5 of 10

Does the job I got it for, which is joining MP4 files. More specifically, to add 5 seconds of blank space to the start of each video. I created a 5 second video containing a blank picture and silent audio track, but with 500 videos to process, I didn't want to have to re-encode every one of them. So I encoded the 5 second video to match the MP4 files I was working with, and tried this out, and it works perfectly.

A couple caveats, however, if you are joining files and using the queue to do so, like I did.

One, if your destination filename contains non-standard characters, like "" (accented "a") or "" (long dash), the program will give every indication that it has succeeded, but the destination file will simply not be there. Oddly enough, it did not have a problem with a "" (a "u" with an umlaut) in the filename. Easy fix was to change the offending letter in the filename, and then correct it in the new file once processing is done.

Another, much more troublesome problem, however, is that if you run out of disk space on the destination drive (in my case, an external hard drive) before the queue has run out, the program will continue to run, but - for obvious reasons - there will be no output files. It would have been nice if there had been some kind of error checking in place that would have halted the queue and said something like "hey, stupid, didn't you check to make sure you had enough disk space?" But no, it just kept going, processing 255 of my files in vain - I estimate around 2 hours of wasted time for my computer. At least I wasn't just sitting there doing nothing and wasting my own time as well.

In all fairness to the developer, these both may have been flaws in the mp4box program itself, and not in this GUI. Nonetheless, the problems exist, so if you use this GUI, you may want to be aware of them. I know for a fact that this was the case with the first problem, and it has been corrected in the latest version of mp4box, but they also changed one little parameter (one that would affect me, anyway), so you can't simply copy the new version of the program into this GUI's folder and expect it to work (I know... I tried).

Posted August 19, 2015 by awgie. Tool version using OS Windows 8 64-bit
Ease of use 8 of 10 Functionality 5 of 10 Value for money 10 of 10 Overall score 7 of 10

does the job very well

Posted May 17, 2015 by rsanchez76. Tool version using OS WinXP
Ease of use 8 of 10 Functionality 9 of 10 Value for money 10 of 10 Overall score 9 of 10

this is the best mp4 file mux/demux program BUT:
ı am using windows 8 and after few muxing when ı try to open program the window is doesn't open up,I see the icon on the taskbar and even when I click on this still can't open up...Please fix this...
ı know it's free ı can't complain,but this is important...
and one last thing:plz add the other languages option on the track title edit

Thanks for the developer

Posted October 29, 2014 by jujiko. Tool version using OS Windows 8
Ease of use 4 of 10 Functionality 8 of 10 Value for money 7 of 10 Overall score 7 of 10

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