I used to use a camera that could not work with my frame-capture program... And I just had to be careful, lol... Though, if you intend to eventually "cut" the video in widescreen, film a little "pulled out" but still in focus, so in GIMP or even MS Paint, you can rotate the pictures slightly or (In GIMP) with the fade feature, see each new picture over the last, to use a type of onionskin in editing... It's how I made many of my first films, which never seemed to have as much bump or lighting flickers as some of my more recent tests...
Just like with animation, there is no one set way... Depending on your needs, you may need to edit/invent a walk cycle... and problems like this are just the same. However, if you do find a better solution, POST IT!!! No need to leave the other brickfilmers in the dark.