Scaling

There are actually two frame sizes that Video Enhancer uses to resize your video: output width and height and actual frame size to scale to (see panda scheme on the screenshot below).

Suppose you have a video 320x240 lines and want to make it 720x480 (NTSC). If you just scale 320x240 to 720x480, the image will become wider, all circles will become ellipses and all people will look fat. Simply because 4:3 proportion (320x240) does not equal 3:2 proportion (720x480). In order to preserve aspect ratio and make video 480 lines high, output size must be 640x480 (to keep the same proportion 4:3).

But you wanted 720x480! In this case you just set output size to 720x480 and size for scaling to 640x480:

Video Enhancer will scale your video to 640x480 and add black borders to right and left to make output width 720. Or, you can set scale size to 720x540 (still 4:3) and output size 720x480. Then Video Enhancer will scale your image to 720x540 and keep 480 center lines, cutting top and bottom. Of course, if you want to change aspect ratio (to make fat people look less fat, for example) you can set any values of width and height. If you do not like typing in pixels, use percents instead. Type % in width or height box to specify size in percents of original. Delete % to switch back.

In the Simple mode you enter just one size - output size. Video Enhancer preserves aspect ratio and scales your video to fit output size (no cutting) adding black borders if needed. In the Advanced mode you can set both sizes manually.

If you want to increase your video resolution more than 2-3 times, you will obtain better quality by using several steps of Super Resolution. Just add several SR steps to the filter sequence, each time doubling the video resolution, and setting desired resolution on the last step.