Adjust Aspect Ratio

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The Aspect Ratio panel is located to the top of the video panel.

Input Aspect Ratio - The aspect ratio of the original video. When a video is opened, this value is retrieved from the video file automatically. You may adjust it manually by using the combo box.

Reset - Retrieve the aspect ratio from the input video file.

Output Aspect Ratio - The aspect ratio of the target video.

Scaling - How is the input video resized to fit the output aspect ratio.

There are three different options to handle the scaling. To make this subject clear, let's take a look of a wide (1.98) video, and we want to adjust it to a normal (4x3) video.

This is a screen shoot of the original video.

Now, let's set the output aspect ratio to 4x3, and set the scaling to "Scale to Fit".

You can see the whole video is stretched. The output aspect ratio is essentially ignored.

Now, change the scaling to "Letterbox".

You can see, black strips are added so the output video looks proportional.

Now, change the scaling to "Pan & Scan".

For "Pan & Scan", the sides of the original video are removed, so the output video looks proportional.