From the course: After Effects Apprentice: 04 Layer Control

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Working with pixel aspect ratios

Working with pixel aspect ratios - After Effects Tutorial

From the course: After Effects Apprentice: 04 Layer Control

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Working with pixel aspect ratios

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- [Instructor] Most of the compositions in this lesson were created at a size that's suitable for standard definition video. And when we talk about standard definition we talk about an image aspect ratio of four units wide to three units tall. If you were to pull out a Calculator that would be four divided by three equals an image aspect ratio of 1.333. However you might have noticed that most of the compositions we've created and footage we've used don't match this number. I'll go back to After Effects to Composition, New Composition, and look at standard Presets like NTSC D1 or DV. These have dimensions like 720 by 480, or in the case of D1, 720 by 486. The PAL standard has even different numbers. Such as 720 by 576. And if we were to haul out our Calculator again and do clear, 720 divided by 486 we find that we're no where close to a 1.33 image aspect ratio. We have something stranger, 1.48 with a bunch of numbers afterwards. What's going on here? Well, it's video's fault. Most…

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