As you probably have already been able to verify, it is not as easy as it seems to take graphic captures of the videos on your computer, that is, capture a specific frame of the video and save it in graphic format. For this you need a specific tool like Fx Frame Capture.
In Fx Frame Capture you have a practical tool, totally free, that will allow you to make any capture of the following types of video: AVI, VOB, WMV or MPEG. In addition, it allows you to save the captures made in JPG, GIF, BMP, TIF, PNG, PCX, DIB, etc.
Thanks to Fx Frame Capture you can also add texts to the captures that are made.
You can free download Fx Frame Capture and safe install the latest trial or new full version for Windows 10 (x32, 64 bit, 86) from the official site.
Devices: Desktop PC, Laptop (ASUS, HP, DELL, Acer, Lenovo, MSI), Ultrabook
OS: Professional, Enterprise, Education, Home Edition, versions: 1507, 1511, 1607, 1703, 1709, 1803, 1809