Relation between file size and capture time step

[titoufinou]

Hello everybody

I've download Video Thumbnail Maker yesterday (the free one at the moment), and I've met a problem when capturing the frames :
The bigger the file to browse is, the higher the time step must be.
For example :
A 700 Mo with a time step at 15" : OK.
A 4 Go with the same time step : KO. It begins to work at 45".

What is the rule ?

Thank you for your help

[bbbrainstorm]

Hello.

By default timiline is divided to equal steps by the number of tiles.
For instance, if you have 5x4 matrix, then your timeline will be splited to 20 equal steps.
But you can set any Step in Options window.