the problem is i need media_play for playing my movies on a panel and even without playing any sounds i have lag , just because of the movies.

I know - and I think that you won't get rid of the problem, because it is a problem of the acknex function and how it works. But, its just my opinion.
Although, I've heard from someone that he used videos for facial expressions - but I have no idea whether he had problems with that or not. But, I guess that in his case a lag was less visible, because it was in a sort of cut scene.

The quote from the manual speaks about media files in general, it is not specific to sound files.

I don't want to bother though, if it is a problem of codecs, let us know which codec works best. Good luck!

Thanks everyone for trying to help , no one bother here , you just try to help.
Its my first time of using media_play /loop /stop and it looks like its a lag problem if someone use it alot. I never had problems using snd_play or ent_playsound so far.

If i can solve the problem with other codecs i let you know.
But i am not sure anymore:(

maby you can upload a movie sample zo we can test on how to reduce the lagg

Ingame movie or one of the movie files ?

just a movie file thats laggs

They only lag in Gamestudio with media_play , not in Windows.

here is a movie from the Game.

No other codecs works here

The problem is that the file dont stay in memory , everytime the video starts it will read it new to memory. Models or gfx stay in memory once they started but the video files not ..... why? how can i change that ?

yah you are right the file cant be loaded into the memory i tried some times

it doesnt work but the only way i thouth this would be possible is this

Have you tested the code ?
I dont think that this works (not tested yet)