POV-Ray : Newsgroups : povray.advanced-users : Animorphic Camera? : Re: Animorphic Camera? Server Time
14 May 2024 22:28:29 EDT (-0400)
  Re: Animorphic Camera?  
From: Le Forgeron
Date: 30 Sep 2015 07:42:05
Message: <560bca8d$1@news.povray.org>
Le 30/09/2015 04:58, dickbalaska a écrit :
> Hi ho,
>
> [ I have an 8 minute POV-Ray video/DVD that I made back in 99-03.
> Since my house is now littered with 60" wide screen TVs, I reckon I need to
> rebuild it, after a 10 year povray hiatus. ]
>
> I can't figure out the camera. For 720x480 NTSC 4/3, the camera is "right
> 1.33*x" .
> I figured for animorphic, I would say 1.78*x and everything would be squished,
> easy peasey. Alas, no. It actually looks the same as the 4/3 version.
> The docs perhaps suggest "angle" may be what I want to tweak, but I'm lost on
> the math. I need to display 854 pixels worth of data in a 720 (or 704) wide
> image.
>
> Help?

720x480 NTSC, 4/3 or 16:9, dvd I presume... neither have square pixels.

The output resolution should be 720x480. That's for the movie encoder.
You must have it encode the right bit about the image ratio, and not 
cropping frames to fit, (and maybe also specifiying the non-square pixel 
ratio), and progressive (vs interlaced) is probably simpler with 
computer generated pictures.

Now, the view is what must fit in the picture. and Either you know the 
ratio of the pixel for the format you want and then apply it as a 
correction factor in the up / right value, or you just get away with any 
image_width & image_height  and hard-coded the desired ratio.

up y
right 16/9*x

That was for DVD. (ratio of 720x480 is 1.5, neither 1:33 nor 16:9)

There is also now the HD-format (blu-ray and other).
Full HD is 1920x1080 (as 16:9), square pixel
HD-ready is 1280x720 (as 16:9), square pixel


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