On Mon, 23 May 2005, Dik Takken wrote:
> > Do you see anything like that 'Deprecated X-tag' message? If you're
>
> Yes, I get them all the time :)
I'd remove it except that it's useful as an indication of an
unconverted program.
> > What happens if you use y4mscaler?
>
> y4mscaler works perfectly. I get:
>
> bash-2.05b$ smil2yuv test.dv | y4mscaler -I active=576x384+0+0cc | head -n 1
> YUV4MPEG2 W720 H576 F25:1 Ib A59:45 C420paldv
Hurrah! But the chroma's still aligned for 420PALDV rather than
MPEG2.
> smil2yuv test.dv | ... | ... | mpeg2enc ...
>
> so, use of y4mscaler seems unnecessary.
Only if quality is unimportant and misaligned chroma planes are
acceptable. Most of the tools won't complain since the data planes are
the same size - but the chroma won't be right. Take a look at
http://www.mir.com/DMG/chroma.html
and you can see the difference between 420-MPEG2 and 420-PALDV
I'll poke around when time allows (right now I've a couple new toys
to play with - new terabyte and a AJA Io/LA [http://www.aja.com]).
Cheers,
Steven Schultz
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