Understanding Image & Display Aspect Ratios
An Aspect Ratio describes the proportional relationship between the width and height of a rectangle:
How GCD Ratio Simplification Works
To reduce 1920 × 1080 to standard aspect ratio format, find the Greatest Common Divisor (GCD = 120): 1920 / 120 = 16 and 1080 / 120 = 9, yielding 16:9.
Frequently Asked Questions (FAQ)
What happens if you upload a 16:9 video to a 9:16 platform?
The platform will either add black bars ("letterboxing" or "pillarboxing") or crop into the center of the frame, causing lost visual information.