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-   -   VirtualDub: Deinterlacing makes picture go out of focus? (http://www.digitalfaq.com/archives/encode/2946-virtualdub-deinterlacing-makes.html)

andybno1 03-11-2003 03:27 PM

VirtualDub: Deinterlacing makes picture go out of focus?
 
for some reason when I deinterlace a capture done in vdub the picture goes out of focus when there is movement but goes back into focus when movement has stopped.

kwag 03-11-2003 04:55 PM

Re: deinterlacing
 
Quote:

Originally Posted by andybno1
for some reason when I deinterlace a capture done in vdub the picture goes out of focus when there is movement but goes back into focus when movement has stopped.

If you deinterlace the same material with an .avs script using fielddeinterlace or bob, do you see the same effect :idea:

-kwag

andybno1 03-12-2003 04:05 PM

avs scripts :roll: I am rubbish with avs scripts I just use the ones on the boards, I know F all about avs scripts.

vhelp 03-15-2003 12:06 AM

hi andybno1,

the ghosting you are seeing after you encode and view on your TV is
due to the Telecine performed on the source you captured. No, you
didn't do a Telecine, the station obtained the source as such. You
just only captured it as such, but when you encode it w/ a de-interlace,
you are getting ghosting effects.

Had you performed a de-interlace on a pure Interlace source from a
capture, you sould not see such ghosting (or as much)

The ghosting is seen becuase the de-interlacing that you performed on
your clip was incorrect. You were problably most likely suppose to
use an IVTC ie, decomb.dll if your source was of Film.
And, if you DO perform an IVTC on a Film, captured source...
do make sure you are encoding at 23.976 fps, NOT 29.970 (NTSC)
I don't know for sure, what PAL region fps use for Film.


Was it a movie ?? Chances are, that it was, and an IVTC would have ben a
better route.

An example of pure Interlace would be, DV cam home-footage, or if capturing
say, the NEWS, WWF Wresting, Sports, these are pure Interlace, and would have
probably done well w/ the de-interlace method you just used.
And, if you DO perform a de-Interlace on a pure Interlaced captured source,
do make sure you are encoding at 29.970 fps, NOT 23.976 (NTSC)
do make sure you are encoding at 25 fps, NOT 50 (PAL) <-- (not sure)

I hope that above help you some.
-vhelp

andybno1 03-15-2003 05:49 AM

I'm not getting a ghostly picture, when there is motion the picture goes out of focus and when the motion stops it goes back in to focus.


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