[Bf-committers] [Bf-blender-cvs] SVN commit: /data/svn/bf-blender [27404] trunk/blender/release/scripts/ presets/render: A number of common rendering presets, looked up and added by Simon Rainerson

[Roger Wickes]

the issue is that it is a multiplier problem. you have 
resolution x scale x broadcast standard x interlacing x anamorphic x framerate 
mostly, so its like two or three choices per means 3^6 possibilities. e.g.,
1920x1080 x .75 x NTSC x i x anamorphic x 30 as just one possibility.

 --Roger


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________________________________
From: Tom M <letterrip at gmail.com>
To: bf-blender developers <bf-committers at blender.org>
Sent: Thu, March 11, 2010 5:52:52 PM
Subject: Re: [Bf-committers] [Bf-blender-cvs] SVN commit: /data/svn/bf-blender [27404] trunk/blender/release/scripts/ presets/render: A number of common rendering presets, looked up and added by Simon Rainerson

Looks like I opened up a can of worms :)

To answer some questions it appears that there are true pixel aspect
ratios, and then there are approximate pixel aspect ratios that are
better for digital video editing software, and the true pixel aspect
ratios are defined differently by different groups.

Based on my reading it sounds like we should be using the following

NTSC 4:3 -> 10:11
NTSC 16:9  -> 40:33
PAL 4:3 -> 12:11
PAL 16:9 -> 16:11

http://www.mir.com/DMG/aspect.html
http://en.wikipedia.org/wiki/Pixel_aspect_ratio#Pixel_Aspect_Ratio_of_Common_Video_Formats

LetterRip
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