[mythtv] 4:3 Zoom code changed?

[Doug Larrick]

On 2003.11.12 09:49, Edward Wildgoose wrote:
> Basically I have a 4:3 telly, but the BBC insist on broadcasting
> everything in 16:9, but when it actually is a 4:3 broadcast then the
> 16:9 picture has black bars down the left and right (as well as the
> letterbox  ones on the top, ie black border all around)
> 
>  __________
>  |  ____  |
>  |  |___| |
>  |________|
> 
> However, when I use the zoom mode then the screen is expanded
> left/right to fit the picture, but the height is expanded by
> significantly more than a proportionate resize and the top/bottom are
> cut off, and people become tall and thin.
> 
> Does that make sense?

Yes, that's what I was intending to accomplish, for both 4:3 and 16:9  
sets (though for 16:9 sets, the offending situation is a 16:9 program  
broadcast within a 4:3 frame).  The old code functioned only for 4:3  
sets.

I'll take another look at this tonight, but here's my math; let me know  
if I've missed something:

Your screen is 16 units wide and 12 high (for an aspect ratio of 4:3).   
A widescreen frame inside this screen occupies an area 16 units wide  
and 9 units tall.  A 4:3 frame inset within this widescreen frame  
occupies an area 12 units wide and 9 units tall.  So to expand this  
frame back to your full screen, we must blow it up by 4/3 and recenter  
it.

Oh, one final question... are the pixels in the video nonsquare?  Is  
this BBC "widescreen" mode really anamorphic?  If this is the case, I  
think I really do need the pixel and display dimensions of the various  
parts in order to make sense of things.

-Doug
 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://mythtv.org/pipermail/mythtv-dev/attachments/20031112/0c59027f/attachment.pgp