Please enter your desired width for a video or image to get the actual height needed to maintain the 4:3 aspect ratio when resizing your original videos or images.
Aspect ratio of 4:3 ("Four-by-Three" or "Four-to-Three") which is also known as Standard Definition (SD) became wildly popular during the first days of moving picture cameras. It was early 1940s when movies originally photographed on 35 mm film could be also viewed on TVs that matched with this ratio. However its popularity is decreasing since the start of the 21st century when users of modern high-definition television sets, broadcast cameras and computer monitors started to favor the high definition 16:9 aspect ratio.