Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Editing › Dealing with multiple aspect ratios, resolution, file types. › I would use the settings o
I would use the settings of the smallest pixel aspect ratio and reduce the size of the 1280 x 720.mov file and crop where needed. There really is not decent way to enlarge the size to the bigger format and have good quality. You may be able to upsize the footage to 720 x 480 and crop as needed but there is no guarantee that it will look that great, depending on the quality of the 640 x 480 footage. If the smaller footage has been compressed it more than likely will look pretty bad.
What is the intended use for merging the two different sized video’s. YouTube and the like or DVD? That makes all the difference in the world as far as how to render the video.