Slider at uneven intervals

Im not sure if i understand what you mean by uneven intervalls but here is my spontanious answer. 

Create a slider with a lot of numbers (for example 100) 

the first event is placed on 1 and the last on 100. then you can place your events on "uneven intervalls"  

1 - 3 - 9 - 10-22-28-48-53-63-67...... 

Do you plan on having the user interact with the slider?  If you do, you will have to work around some issues with the sliders.  I just tried to do what you asked and I couldn't get the slider to "snap" to a certain point (#30). I realized that you can't influence the slider while a user has control of it. So I had to add two layers that checked for a condition (>15 and <50) on the slider. If this existed then the slider variable would be adjusted and "snap" to the point.

So it would look something like this. 

On your main layer, have your slider set.

On Layer 1 add the following triggers:
Adjust variable Slider1 to value SnapNumber 
when layer timeline ends
IF Slider1 > NumberA and < NumberB  (Choose two numbers that a user has to drag between so that it "snaps" to the SnapNumber

Trigger 2
Show Layer 2 when timeline ends

Make Layer 1 only last about .15 of a second.

 

Layer 2 should duplicate Layer 1 but change the show layer trigger to show layer 1. 

 

 

 

 

 

 

My example isn't a timeline but uses a slider to access information at uneven intervals: http://www.4-pt.co.uk/samples/3d-markers/story.html

I have placed visual markers along the length of the slider to indicate where the information occurs, these visual markers are also clickable to make the interaction more user-friendly.