[MPlayer-users] deinterlace+horiz scale

[D Richard Felker III]

On Wed, Jun 09, 2004 at 11:11:38PM +0300, Ville Saari wrote:
> On Tue, Jun 08, 2004 at 08:36:21PM +0200, Matthias Wieser wrote:
> 
> > > Depending on the viewing conditions this can actually be a good thing.
> > 
> > a good thing because you can't see details anymore? Must have been a 
> > really bad film... ;-)
> 
> Good if one prefers smooth motion over sharpness.
> 
> You only see moving object sharply if you follow it with your eyes so that
> the image on your retina is stationary. It works if you are watching real
> world, but video is not real world: sharp moving object will actually
> move backwards on your retina and then jump forward when the frame changes
> resulting jerky motion. Motion blur masks this.
> 
> If the movie is displayed on cinema screen or CRT computer display, another
> even more annoying defect appears: Each frame is displayed as multiple
> brief flashes and motion without motion blur results moving objects being
> seen double or triple.
> 
> The only situation where motion without motion blur actually works is
> interlaced content watched on CRT television (not 100Hz). TV will flash
> each field only once and if the eye follows the moving object, each
> field will be "exposed" on the same position on the retina resulting
> an illusion of perfectly smooth motion.

Smooth? IMNSHO aliasing is anything but smooth... :(

Rich