[mythtv] ffmpeg SWSCALE!

Yeasah Pell yeasah at schwide.com
Thu Aug 31 02:08:17 UTC 2006

Michael T. Dean wrote:
> On 08/30/06 21:54, Yeasah Pell wrote:
>> Michael T. Dean wrote:
>>> Nonetheless, there is 
>>> additional information in the image that can be extracted through an 
>>> appropriate reconstruction process (and can result in a much better 
>>> image given 4x the pixels for output).
>> Of course, people's eyes vary, and one is not always able to get the 
>> ideal screen size or viewing distance for various real-world reasons. 
>> But if it's between setting up a display that is 4x the resolution of 
>> the source content, and setting up a correctly sized and distanced 
>> screen, I would think the latter would inevitably be more cost effective 
>> (I don't even want to know what the price of a 4x 1080p display would be 
>> -- 7680x4320? ha!)
> That's 4x the pixels = 2x the pixels in each of 2 dimensions = 3840x2160 
> for 1080i/p.
Ah, gotcha, I misread you. Actually, from a signal filtering 
perspective, a 2x discrete signal isn't all *that* much better anyway.

The key, as I mentioned, is simply getting the aliased detail smaller 
than you can see (it's impossible to get rid of it on a discrete output 
device, no matter how high you make the resolution). It's possible to do 
that with a properly set up 1:1 screen though, but you have to do the 
calculations for screen size and viewing distance, and know the 
capabilities of your eye.

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