On Thu, 28 Sep 2006 08:23:44 +0200, Pierre Marc Dumuid
<[EMAIL PROTECTED]> wrote:
Hi All,
It's always bugged me that when zooming into interlaced material, there
is a type of moire effect, or you end up zooming into two bars.
Some time ago, I proposed the idea of zooming for two frames, the odd
and the even frames.
Here is that idea somewhat implemented for the nearest neibour method.
The patch isn't complete, (since it doesn't have an on/off button, not
take advantage of the interlace settings that should be set)
...
Would it be much harder to make it work with interpolated scaling, too?
A (VERY SHORT) sample comparison is available at:
http://cvs.cinelerra.org/~pmdumuid/interzoom/myzoom.mov
http://cvs.cinelerra.org/~pmdumuid/interzoom/origzoom.mov
A very obvious improvement, indeed. Any effect that affects the
image spatially (that would be blur and sharpen, too) should be
interlace-aware.
Would it make sense to extend Cinelerra's core to present each
frame as two vertically stacked fields to the plugins?
I suggest playing them with mplayer using:
mplayer -vf pp=lb -speed .5 myzoom.mov
mplayer -vf pp=lb -speed .5 origzoom.mov
You can use -fps to explicitly set the framerat, if you like:
mplayer -vo xv -fps 5
--
Herman Robak
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