(Lets see if my mail gets through this time...)
I'm using the mjpegtools to convert DV to DVD, generally using the
chain lav2yuv->mpeg2enc directly for low-noise (bright) scenes and
lav2yuv->yuvdenoise->mpeg2enc for noisier scenes (low light). I also
use it to convert VHS to DVD via
(lav2yuv->yuvscaler->yuvdenoise->yuvmedianfilter->mpeg2enc). I can't
help noticing that yuvdenoise, and to a lesser extent yuvmedianfilter,
give their output a distinct greenish tint. You can do a direct
comparison like this:
lav2yuv myDV.avi | tee >(yuvplay) | yuvdenoise | yuvplay
which plays both denoised and non-denoised versions at once. I wind
up doing something like "yuvcorrect -R G_1.0_0_255_0_245" to try to
fix the color. I had thought this was related to the pixel layout of
my DV camera, since the noise is mostly red and blue, but I get the
same green tint if I use a commercial DVD as my movie source instead.
So, what's the deal? Is this an actual error in
yuvdenoise/medianfilter, or an expected artifact from denoising the
color info? Am I the only one who sees this? I see it both in 1.6.x
and in CVS.
--
Dan Scholnik
[EMAIL PROTECTED]
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