How can I take screenshots?
To take a snapshot of the video displayed by VLC, you just need to press the pre-defined snapshot hotkey:
Windows / Linux / Unix: Ctrl+Alt+S
Mac OS X: Command+Alt+s
To change it, go to Preferences -> Interface -> Hotkeys settings, check Advanced options, and set Take video snapshot.
You can also take a snaphot via the menu Video -> Snapshot.
To change the snapshot format or directory, go to Preferences -> Video.
Where are my screenshots?
If you haven't changed the snapshot directory in your preferences, your screenshots should go to:
Windows: My Documents\My Pictures\
Linux / Unix: $(HOME)/.vlc/
Mac OS X: Desktop/
To change it, go to Preferences -> Video -> Video snapshot directory.
Hope that helps.
Depends what you need it for, if you're just placing a video screen grab into a website then I just take a screen grab and size it in Photoshop rather than go through a video editor, you don't need it at full size you just need it at a size equal to or greater than the size at which you will be publishing it on the website, so taking a "PrtScn" grab does the job quickly.