> From: Steven Boswell <[EMAIL PROTECTED]>
> >You should use the -S -B option of mpeg2enc for spliting videos.
>
> I don't understand. The -S option of mpeg2enc doesn't actually seem to
> produce separate files, just sequence-end marks; from my experience,
> only mplex actually splits videos into separate files. Also, I
Right, so give a printf-like name to mplex thus:
mplex ... -o foo-%d.mpg foo.m2v foo.mp2
and mplex will use the -S points set by mpeg2enc and create multiple
files called "foo-1.mpg foo-2.mpg ..."
> But if I drop the -b option, I'll get 7500 kbps, and then the video
Use a -q of 6 or perhaps 8 *and* add the -N option to mpeg2enc's
usage. I've found that the mild high frequency reduction from -N
does wonders for the average bitrate.
> won't fit onto the DVD. Also, you really think I need to use the
> denoiser on a high-quality S-Video source like a LaserDisc?
Yes. The settings do not need to be as aggressive as for VHS
sources but going thru the denoiser will help a lot. Try "-l 1" or
perhaps "-l 2" to yuvdenoise (and perhaps raise the search radius
with "-r 16" or "-r 24"). Also remember to black out any noise/junk
(if any) at the edges ('-b ...' to yuvdenoise or ACTIVE_* to yuvscaler).
If you're coming from S-Video (analog) then I've found that using
704x480 (which is the NTSC frame size) instead of 720x480 (which has
an extra 8 pixels on each side) can save ~2% on the bitrate (fewer
pixels to encode of course :)). You can make sure that the frame is
centered by using the 'y4mshift' program (in the development version
of mjpegtools for certain, I'm not sure if it's in the 1.6.x release
version).
Good Luck!
Steven Schultz
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