I mean, how to generate images files from a video like screenshots.
I have just downloaded the latest version of VLC for Windows 32 - 2.1.2 Rincewind and it works fine to do this.
1 - Click Tools > Preferences and click radio button All
2 - Scroll down and click the + sign next to Video to expand
3 - Scroll down and click on Scene Filter and fill in the info for Directory Path prefix (where you want to save frames). Don't click Save.
4 - Scroll up and click on the word Video under Filters
5 - Click the check box for Scene video filter and click Save.
6 - Open and run a video and it will save .png's
7 - To stop saving frames go back to step 5 and uncheck Scene video filter. Easy really once you know where to find the settings.