video screensaver - white is displayed as light grey

[sebastian_g]

Hello,
I have a strange problem with a video as screensaver, maybe some could help me ...
I have set a movie (wmv) with much white in the background as a screensaver.
When the scrennsaver starts a strange thing happens:
The movie is too dark. White is displayed as light grey (235 instead of 255).
How is this possible? I also tested a mpeg file - same result.
Has anyone experienced the same? Any suggestions or even solutions?
I would really appreciate your help. My client needs to have the screensaver in white.
Sebastian

[Karlis]

Hm. Sounds strange. I have never experienced anything like this. Can you test this on some other computer too? I suspect there is some problem with that particular computer.

[sebastian_g]

hi karlis,
I tested on several computers and systems:
windows xp on a mac pro with parallels, the system i work on -> no problem (white is white)
windows xp on an imac with bootcamp -> no problem (white is white)
pc with win xp or vista, my clients system (tested on a few pcs) -> problem (white is grey)
more strange: a friend testet a softwear-demo of another company and had the same problem.
so perhaps it's sothing with the settings of the grafic-card or so but why this effect?
would it help if i send you some files to test an recreate the problem on your own?

[Karlis]

We can try this, but frankly this is something very rare and specific because we have not had any similar reports from other users, so it is not a very common problem.

The video playback is provided by Windows built-in playback means so we have not even programmed the player, it uses system settings and drivers.