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dauriac

Member

Registered: 2019-01-29

Posts: 45

opening .mms files

Hello,

I have a very basic cell phone.  When I receive MMS the screen is so small that I can't see anything.
But I can download on my arch-linux computer the associated file. The extension is .mms.

dauriac@megajack:~/tmp2$ file 58067.mms 
58067.mms: DOS executable (COM, 0x8C-variant)

moreover using 

 ghex 58067.mms 

the suffix .jpg appears many time, so there should be a jpg file hidden in the .mms.

Does anyone know how to visualize the mms, or to extract the jpg file

Thanks

Last edited by dauriac (2022-09-02 15:48:22)

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: opening .mms files

No idea how to display / manipulate it , but https://en.wikipedia.org/wiki/Multimedi … ng_Service describes how it's setup .

What is the output of file your-received-message.mms ?

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

xerxes_

Member

Registered: 2018-04-29

Posts: 675

Re: opening .mms files

Can you post an example of such mms file?

dauriac

Member

Registered: 2019-01-29

Posts: 45

Re: opening .mms files

Thank you Lone_Wolf there are valuable information following the link.
The result of the command "file" is at the beginning of the post

dauriac

Member

Registered: 2019-01-29

Posts: 45

Re: opening .mms files

thank you xerxes_. An example is available at adajc.free.fr/58067.mms

dauriac

Member

Registered: 2019-01-29

Posts: 45

Re: opening .mms files

By removing from the mms file everything before the header of the jpg file ( ie 6 bytes before the occurence of  the string JFIF) I got a jpg file I could open with gimp.
This solve my problem, but not if I received another mms with audio for example .

Maniaxx

Member

Registered: 2014-05-14

Posts: 738

Re: opening .mms files

The problem is *.mms is not a defined standard format. Wireshark has its own implementation and there is some extractor here. You would need to find an extractor for your specific format.

How do you extract/save the file exactly from your phone? Any desktop software involved? What phone model do you have?

Last edited by Maniaxx (2022-09-03 16:09:50)

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sys2064

dauriac

Member

Registered: 2019-01-29

Posts: 45

Re: opening .mms files

My phone is a very basic flip phone (echo clap 2, by sunvalley I guess), which I connect via an usb port to my computer. I found that it runs a raspbian OS. I can access to directory on the sd card where the mms are stored as .mms files. It is then not difficult to extract the jpg file. I can provide my python script, but it is so simple.

Thank you for your messages. I consider my problem as solved (until I received an mms not including a jpg file).

xerxes_

Member

Registered: 2018-04-29

Posts: 675

Re: opening .mms files

It is simplier to save image (nevermind if it is jpg, png, gif or enything else) from mms to your phone, then copy that image from phone to computer. Why complicate simple things?

Last edited by xerxes_ (2022-09-05 21:46:03)

dauriac

Member

Registered: 2019-01-29

Posts: 45

Re: opening .mms files

Ok thank you