I made a simple movie mixer with radiogroups that controlls the amount of mixing of the to movies. But how do I get the timespan to between 1) and 5) as througn 1) to 2), 2) to 3) and so on? Is it is right now the slider of course moves faster betweet 1) to 5) then 1) to 2). How do I make this to move at the same speed everywhere?

movie-mixer-question

I understand that you want the fading time i.e. from 25% to 50% be only a quarter of the time that would be needed to fade from 0% to 100%.

If I get you right, this might be a solution:

you are dealing with percentages (0% to 100%). So you can calculate the absolute difference between the last two percentage values, scale this difference down to a value between 0. and 1. and finally use this value as a multiplier for your fading time:

movie mixer question ...