On Tue, 24 May 2005, Steven M. Schultz wrote:
"2" means 4:1:1 - and I thought you were dealing with PAL DV which is
one of the 4:2:0 variants.
Ah, so y4mscaler only needs to convert between the PAL-DV variant of 4:2:0
and the PAL-MPEG2 variant that all MJPEG tools van handle. The stories
about using the "-i 2" switch that I read about on this list only apply
to NTSC video. Hmm.. Confusing stuff, this is... :)
I think that "-i 2" is forcing smil2yuv to treat PALDV data as 4:1:1
rather than 4:2:0. The result will be rather severe misalignment of
the chroma planes ;)
That sounds like what it looks like.. Guess that must be it.
What happens if you combine the two commands above into:
smil2yuv test.dv | \
y4mscaler -O chromass=420_MPEG2 -S option=sinc:4 | \
yuvcorrect -Y LUMINANCE_1.0_16_235_127_127 -Y
CHROMINANCE_0.0_4_128_4_128_16_240 | yuvplay
Will try that as soon as I get home.
Thanks again,
Dik
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