Is it possible to force mplayer to open a movie on a predefined screenmode in fullscreen, not the same resolution like ambient?

Yes you can,

mplayer -vo <videodriver name>::MODEID=<modeid hex value>

So for instance, mplayer -vo cgx_overlay::MODEID=0x40920053 <your file>

You can use getmodeid from aminet to know the modeids for a given resolution.

Or ScreenMode -> Edit Screen

Or GetModeID from PicShow archive :)

Can i use this in the popupmenu of the new Ambient?

If you mean the contextmenu depending on filetype, sure, you can. Just modify the action for your video filetypes accordingly (and in case you don't know it, you can add actions for the whole video/* family, instead of adding them for every single video filetype).

Yeah i mean the contextmenu, and i know how modify it but i don't know the right syntax.
Maybe someone could help me with an example.

many many "examples" (also for Mplayer):

http://morphosambient.sourceforge.net/dl/Filetypes20061027.lha


[ Edited by mk on 2007/2/9 8:00 ]

I use this command: Run >nil: `type env:pathapp/mplayerRC1` %sp -vo cgx_overlay::MODEID=1083310162
But MPlayer still opens a window in Ambient no screen.

[ Edited by ThePlayer on 2007/2/9 9:59 ]

Well, first MODEID doesn't accept decimal values ATM, but only hexadecimal (ok it's lame:)). Secondly if you want to start directly in fullscreen mode, then add -fs

And how do i get the hexadecimal values?
And if i add -fs at the end of line mplayer opens in FS but my TFT is going black and nothing happens.

Well, getmodeid from aminet returns the hexadecimal value (0xsomething). Otherwise take your favorite calculator and convert your decimal value to an hex value. :)

Thank you now it works!
And keep up the FABulous work you do on Ambient and the rest of the Ambient Team.

PS: One question: Is it possible to compile Ambient with a higher icon max size like 96x96?