About a month ago we mentioned the first in a ongoing series of articles on Pixel Aspect Ratios in digital video. Well it’s about that time again…After Effects gurus Chris and Trish Meyer of Cybermotion have now shared Part 2 of their Pixel Aspect Ratio primer (PDF).

Part 2 delves into the how and why of setting PAR (Pixel Aspect Ratio) tags in software for all your project media, gotchas associated with still image sources, and when to use square pixel compositions. Next up? The upcoming Part 3 article will touch on IAR - Image Aspect Ratio, and how it affects widescreen sources. Stay tuned.