Quote:
Originally Posted by bkman
So that is the question that I haven't seen everyone agree upon: If you have a movie/show that you "know" the aspect ratio of (16:9, 4:3, etc) but it has black bars which need to be cropped, do you a.) Use the cropped size in your SAR calculation, or b.) Use the original size before cropping?
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What I do is establish the aspect ratio of the source movie. The popular "Movie Aspect Ratio's" (MAR's) are, 1.85:1, 2.35:1, 2.40:1
All MAR's can be converted to a fraction. For example: -
1.85:1 works out at 37/20
2.35:1 works out at 47/20
2.40:1 works out at 12/5
The MAR value can then be placed into the equation like this: -
Code:
MAR FAR ARS
47 368 17296 1081
-- x --- = ----- lowest dominator ---- Giving an ARS value of 1081:900
20 720 14400 900
Which can be further simplyfied by converting: -
Code:
1081 1080 6
---- to ---- lowest dominator - Giving an ARS value of 6:5
900 900 5
Cheers