Video Aspect Ratio Changer

Video aspect ratio is the proportion between width and height of the video image. There might occur some time like the image of video was overly stretched or movie video couldn't fit in wide screen. So we might need some video aspect ratio changer to solve this problem. There are many tools in internet, just use them to choose one perfect aspect ratio.
And the process of these tools is simple and easy too: Just add video, select the video format and choose the correct aspect.