RFC: Xv field order

[Ville Syrjälä]

On Tue, Jun 23, 2009 at 04:48:25PM -0400, Benjamin M. Schwartz wrote:
> Ville Syrjälä wrote:
> > On Tue, Jun 23, 2009 at 08:08:38PM +0200, Krzysztof Halasa wrote:
> >> Thomas Hilber <xorg at toh.cx> writes:
> >> Come on, playback of interlaced video only makes sense with vertically
> >> unscaled display.
> > 
> > Not true if you can scale the fields independently.
> 
> Even with scaling, it's not a great idea.
> 
> Interlacing is a psychovisual hack, designed to make use of your eye's
> motion-compensation and spatiotemporal interpolation systems.  It only
> works if the scan lines not present in each frame are black, because your
> persistence of vision will fill in the black lines with the correctly
> motion-compensated contents of the previous frame.

Sounds like you're thinking of bob deinterlacing which this is not. The
output will still be interlaced with black scanlines and all.

-- 
Ville Syrjälä
syrjala at sci.fi
http://www.sci.fi/~syrjala/