how to invisible brandmark DVD-Video?

[jak_omo]

hi guys,

there are DVD-Videos out there made by me and released on some forums.
some people are selling(!) the staff with there own brandmark, like adding logos.

is there a way to brandmark that staff so that only i can check it out these files are made by me?
such as adding some letters into a DVD file, bup, ifo vob or something else?
i wont brandmark the video files or the menü, it must be simple but effectife..

or any other suggestions how to brandmark it?

[Safesurfer]

Maybe the MSU Stegovideo filter would work. See http://www.compression.ru/video/stego_video/index_en.html

[thecoalman]

Put a copyright on it in the beggining, you can always send them a very official looking letter that you are going to sue unless they remove the logo. In a lot of cases the letter will deter many, depending on the copyright laws in Turkey you should have legal standing ground if you really wanted to go through with it. Putting your own logo on it probably wouldn't worjk anyway since they could just cover up with their own...

I'm guessing you are giving these videos away for free whiuch is very noble. Nothing worse than someone stealing your work....

As far as adding a copyright directly into the DVD I don't think you have many options, How about a secret menu page you could access through punching a few digits on the remote? Most likely thay are just ripping the vobs and reencoding them leaving the menu structure intact?

[thecoalman]

Maybe the MSU Stegovideo filter would work. See http://www.compression.ru/video/stego_video/index_en.html

Ah I was looking for that link, first thing I thought of...but.... the hidden text is destroyed if you reencode.

[mikiem]

perhaps something like the Digimark stuff burned into a still perhaps looped at begining & end, though it could be cut...

Screeners use a hard sub every so often, but that's pretty intrusive for customers. Might try something along the lines of cable companies, using a small, almost transparant logo on one side of the lower 1/3.

[jak_omo]

thx for your ideas, but i am looking for a solution without re-encoding.
like the MSU filter with hidden text but for example with vob-editing.
open vob add some text, or something like that

[trossin]

From what I remember the VOB files are just one big array of bytes that are indexed by the IFO files. It seems to me that you could add some junk to the end of the last VOB and it would have no effect on the video playback but it would still be on every disk.

If you are a UNIX person you could:

echo "This is my stuff!" >> VTS_01_05.VOB

and that would do the trick. Maybe an option to MSDOS copy can do the same thing.

I have never tried this but unless there is a check VOB size it should work unless the extra few bytes make the file larger than a GIG. If that is the case you are stuck.