The AMT – Auto-Movie-Thumbnailer is a free application that automates the process of thumbnails creation to index thumbnails for any movie. It supports many video formats such as (AVI, MPG, Quicktime, Real Media, Windows Media, etc.).
In very small films, they may not have enough frames (depending on the format) for multiple images e.g. if you want to have 20 images per movie but the movie only has 10 frames.
The application function is very simple, run it and select the folder where your video is located, before you press Start Processing to start the thumbnail generation process and set it to disable or enable Batch Timer that is, the length of the video from which you want to get the thumbnails. Finally, you can adjust the number and many other details through the program options.