Teaser Picture

Hi there,
we are converting files via command line and would like to create teaser pictures for the converted files, so that you have a preview picture to click on the website. Do you have a good solution for this?
Cheers,
Frank
we are converting files via command line and would like to create teaser pictures for the converted files, so that you have a preview picture to click on the website. Do you have a good solution for this?
Cheers,
Frank