Hi!
On Mon, 19 Jan 2004, Andrew Stevens wrote:
> > > It's the precision of the DC component. Most commercial DVDs
> > > use -D 10 but mpeg2enc defaults to 9 to save a few bits. A
> > > value of 11 is only valid at the next MPEG-2 profile/level so it's not a
> > > currently meaningful value to use.
>
> Could you add a note that setting -D 10 may help large smooth dark areas avoid
> looking blocky...?
Oh, interesting - hadn't thought of that benefit.
> It might even be worth making -D 10 the default, it
> saves very very little and re-encoding is a pain.
The tests I ran (had the results written down somewhere but can't
seem to find them at the moment) showed a very slight increase in
filesize (~1% or so) when using -D 10 instead of leaving it at the
default of 9. Probably my imagination but the results looked better -
somewhat more "solid".
> What does everyone think?
Almost all the commercial DVDs I've looked at with 'dvdview' use -D 10
so making that the default would be a reasonable thing to do.
Cheers,
Steven Schultz
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