[mythtv] 4:3 Zoom code changed?

[Steve Davies]

Doug Larrick wrote:

> Aha!  I think I see the problem.  The video is 16:9 aspect ratio, but  
> the pixels that make it up are (roughly) 4:3.  I will give some thought  
> to how to fix this tonight when I have some time.  Do you have such a  
> video somewhere I could download it for testing purposes?
> 
> -Do
> ug

This sounds like "Anamorphic" by my understanding.

While people are playing with this code, could I throw in a feature request?

I have a 16:9 television, but the video card will only output 4:3. The "best" 
way IMHO to output the image in this case is anamorphically (I think I 
understand anamorphic correctly ;-) ). The television then stretches 
horizontally so that the aspect ratio all gets fixed up. I believe this 
results in the least data-loss at the screen.

I believe that MythTV could do with 2 anamorphic settings (3 if you include 
"off"):

No cropping allowed:
4:3 source data - Shrink to 3/4 size horizontally.
16:9 source data - Stretch vertically by 4/3.
Anamorphic source data - Display unscaled.

Cropping allowed:
4:3 source data - Stretch vertically by 4/3, cropping excess.
16:9 source data - Stretch vertically by 4/3.
Anamorphic source data - Display unscaled.

On a widescreen TV that is set to stretch horizontally, this then displays 
correctly. On a 4:3 television, it looks pretty weird :-)

I also noticed that a 16:9 source file sets the output to 16:9 mode by 
default, but that the register that stores the current mode for the 'w' key 
does not reflect this. This means that pressing 'w' for the first time does 
nothing for a 16:9 source file.

I hope that all makes sense!

Regards,
Steve

-- 
Steve Davies                   steve at one47.co.uk

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