I use vlc player to make my screencaps. It's been a years since I downloaded it, but I think it's a free. I followed this tutorial, but I do have to close and restart the player after saving the settings or it will ignore them. More often than, I've had to specify the image width and height directly or the aspect ratio might be skewed (but those might have just been the NCIS or Highlander screencaps that have a different aspect ratio, but it's become habit by now.

The only issue I've found when it comes to source material since I started back up last year was (or was it two years ago?) is that the player won't work with blu-ray. I have to either use DVDs or video files I have on the computer.

As for the zip files, I either use 7zip or the functionality that windows offers depending on what I spot first in the context menu.