Widescreen Scaling

[Mike Young]

Is there a easy (or automatic) way to scale a standard def. show to full screen on a widescreen ? I experimented with aspect ratio and it seems to deliver a perfectly scaled picture at about 125% by 100% when in 16:9 mode.
The problem with this is that 25% of the vertical picture is ouside the viewing area.

mike/

[salsbst]

How about 100% x 80%?

[stanger89]

Which way are you trying to scale?
These seem about right for me:
For a letterbox source, 16x9 AR @ 133%V x 100%H
For a normal source, Source or 4x3 AR @ 100%x100%
For an anamorphic source, Source or Fill @ 100%x100%

Source will stretch the video to fit the source AR (ie either 16x9 or 4x3 based on source), 16x9 or 4x3 will stretch to fit a 16x9 or 4x3 area respectively. Fill will stretch to fill the screen (or window) regardless of source.

All aspect ratios assume square pixels, ie a 16x9 display and a 16x9 desktop resolution.

[Mike Young]

what I was really hoping to do is something like the "full screen with justification" mode my display can invoke ...where it uses the full screen and normalizes the standard definiton (4X3) signal. scaling mismatch is only noticable at the far left and right edges of the sceen. My display cannot do this with VGA input for some reason ( or component) it is only possible with DVI for some reason. I was also under the impression that Zoomplayer can do this, by matching the preset resolution with a custom aspect ratio, but I have only experimented a little with this.

mike/

[stanger89]

Ah, you're looking for "non-linear stretch", where the center is roughly untouched and the sides are stretched more to make up. The only app I'm aware of that can do that is dscaler. But you may be in luck. It can be done (although not necesarilly easilly) with ffdshow.

You can use either Warped resize or dscaler's linear correction filter via ffdshow's dscaler plugin.