SWFShot is a utility to allow you to take large high resolution snapshots of your JPG, PNG and SWF content. SWFShot is pretty simple really. Once you've read these instructions, view the "File and Info" tab to get started. From there, you can browse for a file.
Now that the file is selected and you are ready to capture images from your media file, click the "Load Media" button to load it behind the application as fullscreen panel-less, windowless preview. The SWFShot plugin allows you to play any movie with SWF content.