Working with pixel aspect ratios


show more Working with pixel aspect ratios provides you with in-depth training on Video. Taught by Chris Meyer and Trish Meyer as part of the After Effects Apprentice 04: Layer Control show less
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Working with pixel aspect ratios

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 that's 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 in most of the compositions we created and footage we used don't match these number. Go back to After Effects, to Composition > New Composition and look at Standard Presets like NTSC, D1 or DV.

these have dimensions like a 720 x 480 or in the case of the D1, 720 x 486. The PAL standard has even different numbers, such as 720 x 576. And if we were to haul out our calculator again and do clear, 720 divided by 486, we'd find that we're nowhere close to 1.33 Image Aspect Ratio. We have something strange here. 1.48 with a bunch of numbers afterwards.

What's going on here? Well, it's video's...

Working with pixel aspect ratios
Video duration: 9m 32s 2h 40m Beginner Updated Nov 15, 2012

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Working with pixel aspect ratios provides you with in-depth training on Video. Taught by Chris Meyer and Trish Meyer as part of the After Effects Apprentice 04: Layer Control

Subject:
Video
Software:
After Effects
Authors:
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