framerate issue

You are seeing the iSight's auto-exposure in action. (The framerate is automatically adjusted based on available light.) Unfortunately, there's no way to manually adjust the built-in iSight's frame rate. If there was, the result would just be a very dark image. :-/

Hello Pr0digy V.

 I want this cam to do 30 fps at all times, can anyone tell me how i can accomplish this ?

As Pastahelmet has told you, iSight's automatic frame rate is controlled by the iSight software. In their iSight's video "stutters" in low light when I turn it on KBase article, Apple confirms that Sight lowers the frame rate to preserve picture quality when in low light:

The easy way to keep your iSight working at 30 fps at all times is to follow the instructions in the Apple KBase article, and Use good lighting for the best iSight picture all the time.

 Could there be a script of plug-in out there that can override these auto-features ?

Because some of iSight's functions are controlled by individual software applications, you would need to search for plugins for each software application you want to use with your iSight. My Google searches for "frame rate control plug-in" for the applications that I use most often with iSight from this list failed to find anything that can control iSight's frame rate.

Likewise, to check for scripts, you can Script Editor > File > Open Dictionary and double click on the name of an application of interest to investigate what scriptable functions each application offers. There can be no script that controls iSight's frame rate in an application unless that application offers iSight frame rate control as one of its scriptable items. My review of scriptable items for iChat and QuickTime Player failed to show any promise for controlling iSight's frame rate. However, you should check for yourself and include other applications that may be of interest to you. If you find something that looks promising, I suggest you search for information about it or post about it in the Forum: AppleScript.

I doubt that you will find a way to control iSight's frame rate other than by adjusting light levels, but, if you do, please post back and share how for the benefit of others who are interested in that capability.

Cheers,
Jim

Mac OS X (10.4.10)  G5 DP 1.8  External iSight

You're welcome, Pr0d.

 Seems there is nothing i can do, ... maybe how i can look for a solution in the future.

To do that, consider a more technical approach than existing plug-ins or scripts.  Built-in iSight information available from Apple Developer Connection may help you decide whether you want to try to develop your own software rather than merely adding more light.

Cheers,
Jim

Mac OS X (10.4.10)  G5 DP 1.8  External iSight

Seems there is nothing i can do, adding another light bulb tomorrow 😝

Would it be of influence if you would change settings in your keyboard preferences? I think they react to the light level to either turn on or off the
keyboard backlight. I would not be surprised if that sensor would also set
the iSight to the low light or high light level.

Just an idea.

MacBook Pro 2.33 GHz Intel Core 2 Duo Mac OS X (10.4.10) 3 GB 667 MHz DDR2 SDRAM