AMT - Auto-Movie-Thumbnailer is an application that allows you to automatically feel of a video screen.
You can configure options to suit your needs and to allow it to have a good bunch.
It supports a good number of different formats, so you will not have problems with your videos: AVI, MPEG, WMV format, ASF, RMVB, the MOV, MP4,
A really great video taken during the default screenshot each 2 seconds and the integrated image sated plenty of screenshots.
You only need to load the video on AMT - Auto-Movie-Thumbnailer Choose the settings and the program will do the rest automatically.