A solution that is fast flexible and gives great results. It is not Open Source but it is a free download for Linux. You may have heard of it before. Wink is a utility for creating flash/swf based presentations.

1. Using Wink, capture your video and then stop capture.
2. Wink loads the video into it’s editor.
3. Instead of rendering the video as an swf file, select File->Export as HTML.
4. Name your html file and select your image output format.
5. Click OK.

You now have a sequence of crystal clear PNGs, or whatever format you selected, ready for editing in the Blender’s Video Sequence editor!

It is just that easy!

P.S. – Load the images as an image sequence in the Compositor and now you can overlay a sound track. :)

Wink is a Tutorial and Presentation creation software, primarily aimed at creating tutorials on how to use software. Using Wink, you can capture screenshots, add explanations boxes, buttons, titles, etc. and generate a highly effective tutorial for your users.

You can get the Wink application here.