Is there user friendly software that can convert avi file to jpg file

My digital captured a picture (by mistake) on the video setting, and I need the picture as a jpg. I tried everything I can think of to convert the avi file to jpg, even a software that was supposed to be able to do it—It doesn’t work either. Help!
FordsFotos

Super can do this, http://www.erightsoft.com/SUPER.html, although not too many would call it user friendly, it’s not that difficult to use.

Where it says “Select ouput container” choose sequence of images.
Set “Output Codec” to Jpeg.
Just remember you will get a lot of jpegs, one for each frame of the video.

Where it says “Drop a valid multimedia file here”, just right click and browse to your avi file. When you have the file select "Encode (Active Files). The default output folder is eRightsoft/Super/ouput. You can change that.

If you are not afraid of the command line, there is a program called ffmpeg that will also do the same thing (as a matter of fact this is what Super uses). The command is pretty simple:

ffmpeg -i video.avi image%d.jpg

(where video.avi is the name of your file)

If you can open it in VirtualDub you can choose which frame(s) you want to make stills from. Beware they won’t be high quality because AVI mode on most cameras is 640 X 480 or less.

You can also use Video Thumbnails Maker: http://www.suu-design.com/projects.html