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Photoshop: March 2010 Archives

In today's world, there many different formats of video.  It can be a challenge mixing computer generated graphics with NTSC video.  That's because NTSC video uses rectangular pixels which doesn't match elements designed with square pixels. 

square_vs_non-square.gif

Popular programs such as Photoshop and After Effects work with square pixels.  In these programs, you can turn on a a feature that corrects for the difference, but you'll suffer a degradation in visual quality due to the interpolation.  Therefore, a professional designer would prefer to build everything with square pixels.

pixel_aspect_ratio_correction_warning.gif

This difference is roughly 10% (.9) vs (1.0), but it's enough for the seasoned video editor to immediately notice a difference.

nstc_aspect_photoshop.gifFinal Cut Pro has a great feature that allows you change individual clips from non-square to square pixels (or vice-versa).  Therefore it's possible to compensate for the pixel aspect ratio when combining non-square and square video elements into the same sequence.

To correct for pixel aspect ratio problems within Final Cut Pro, you can follow these steps:




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This page is a archive of entries in the Photoshop category from March 2010.

Photoshop: December 2009 is the previous archive.

Photoshop: July 2010 is the next archive.

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