MMS & Forward Lock

MMS & Forward Lock SearchSearch
Author Message
Jason Wong
New member
Username: Jasonwcm

Post Number: 15
Registered: 02-2009
Posted on Wednesday, February 24, 2010 - 08:23 am:   

I'm using NowSMS 2008 and trying to implement forward-locking for my MMS and I'm having some difficulties. Hope someone in here can assist me.

From what I've read in here, I need:-
1) to use drmcomp to create a DM file?
2) to MMSForwardLock=Yes in my MMS submission?
3) to reference to that DM file in my SMIL file?

Essentially I have an image file which needs to be forward-locked before I send out the MMS. OR do I forward-locked the entire MMS??

I've read some articles and discussions on drm, oma, and got all confused. =(

Please help.
Des - NowSMS Support
Board Administrator
Username: Desosms

Post Number: 1839
Registered: 08-2008
Posted on Wednesday, February 24, 2010 - 03:18 pm:   

Hi Jason,

It would probably help if I answer the conceptual question first.

When you use forward lock in an MMS, it is individual components of the message that are forward locked, not the message itself.

When you use "MMSForwardLock=Yes" in the submission, NowSMS applies the forward-lock wrapper automatically.

However, if you are using your own SMIL, this will cause confusion ... because NowSMS changes the file name when adding the forward-lock wrapper, but will not rewrite the SMIL. (NowSMS adds a ".dm" extension to the filename so "image.jpg" becomes "image.jpg.dm")

So ... if you use your own SMIL, I would suggest creating your own DM file (be sure it has ".dm" extension, and for best results, do it like NowSMS does, keeping the original file extension as well), and reference the ".dm" file in your SMIL.

When you are creating your own DM file, do not include the MMSForwardLock=Yes parameter.

If you do not use your own SMIL, you can use MMSForwardLock=Yes without first creating a DM file.

--
Des
NowSMS Support
Jason Wong
New member
Username: Jasonwcm

Post Number: 16
Registered: 02-2009
Posted on Thursday, February 25, 2010 - 01:22 am:   

Sorry, I'm still a little confused here.

Ok, basically I'm writing my own SMIL.

So that means I need to create my own dm file and by creating my own DM file, does that mean I just use the drmcomp to create it and in my smil file, I just reference to it as <img src="image.jpg.dm">?
Jason Wong
New member
Username: Jasonwcm

Post Number: 17
Registered: 02-2009
Posted on Thursday, February 25, 2010 - 02:48 am:   

Btw, I managed to get it to work using DRMCOMP to create DM file and reference it as <img src="image.jpg.dm">

However, I only got it to work on Nokia's N97 and N73 (cos it says "Unable to forward protected objects") but not on iPhone or Sony Ericsson W200i (cos it says "Message corrupted").

Is this a phone-dependent issue or the drmcomp not being updated to cater for these phones yet? Both iPhone and SE W200i can't read the MMS but prompt to save the image instead
Des - NowSMS Support
Board Administrator
Username: Desosms

Post Number: 1851
Registered: 08-2008
Posted on Thursday, February 25, 2010 - 04:09 pm:   

Hi Jason,

To the best of my knowledge, it's a case of not all manufacturers actually supporting forward lock. Nokia was one of the first to support it, but others have been slow or reluctant.

Unfortunately, the iPhone is notorious for not supporting many of the OMA standards. For example, it does not support any type of WAP push other than MMS. It does not support forward lock or any of the other OMA DRM mechanisms.

It should work, however, on the SonyEricsson W200i. I don't have that model ... but I have similar models, and I plan on running some tests later today or tomorrow to see if I notice any issues.

--
Des
NowSMS Support
Jason Wong
New member
Username: Jasonwcm

Post Number: 18
Registered: 02-2009
Posted on Thursday, February 25, 2010 - 04:22 pm:   

I see. Thanks for the additional info and do let me know when you got it to work on SonyEricsson.

Thanks a lot in advance Des.

Cheers.
Des - NowSMS Support
Board Administrator
Username: Desosms

Post Number: 1896
Registered: 08-2008
Posted on Tuesday, March 02, 2010 - 05:09 pm:   

Hi Jason,

Sorry for the delayed follow-up. I've been doing some MMS forward-lock testing today, and I'm not seeing any problems on recent SonyEricsson devices. But I don't have a W200i.

Just to make sure I'm not missing something specific to your creating your own SMIL ... what happens if you send an MMS via the NowSMS web form and check "Forward Lock"? Does that also not work on the W200i?

--
Des
NowSMS Support