Issue with deflicker, deinterlacing of film capture in Virtualdub
- From: "Doc" <docsavage20@xxxxxxxxx>
- Date: 28 Aug 2006 04:40:02 -0700
I find that applying a deflicker filter - in this case the MSU
deflicker - to a file of captured film causes an undesirable flickery
"contrail" effect in the image similar to the "tail" setting you can
elect for the mouse cursor in Windows (though why anyone would want
their cursor to look like that escapes me). This is visible whether the
file is processed for output to tape or as a DVD. If it has any
bearing, the file is DV.
Through experimentation, I find that checking the deinterlace option in
the white balance filter and further NOT choosing "interlaced" in the
resize filter, this artifact goes away.
The same footage when using the same filters except for the deflicker
filter doesn't exhibit this artifact.
Why is this? Is there a better way to eliminate it? My concern is I
don't want to degrade the fundamental image quality. I was under the
impression that the reason for interlacing is because a TV scans 2
different fields to yield a complete image. Does deinterlacing reduce
the image quality? The deinterlaced footage looks okay from what I can
tell, it's certainly more watchable without the contrail artifact. But
is the "right" way to eliminate it?
Thanks for all input.
.
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