 | | | Re: Wow - Quicktime 7 H.264 compression - and Mpeg 4 too | Re: Wow - Quicktime 7 H.264 compression - and Mpeg 4 too 2005-11-16 - By staigermanus
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--- In Carrara@(protected), "ccoles_avengers" <ccoles_shado@(protected)>
wrote:
>
> Hi Philip,
>
> Yes they do look pretty good [ although I wish the animation was
> longer. Just as you get into him walking, it stops. :) ]
>
> Say, have you ever made any comparisons with DIVX as far as
> compression vs. quality? DIVX seems to be able to squash files to
> really small bite-sized pieces without much quality loss, IMO. The
> only thing is that it doesn't stream, at least not just yet.
>
> Just curious.
yes I like DivX too, have also used Xvid, but I don't think there's a
divX or xvid compressor for quicktime yet, except that there's not a
whole lot of difference between the compression basics of mpeg4 and
divx. So I suppose there's similar compression levels there. But I'm
not an expert at it.
>
> Cheers.
>
> Claudia
> "Selocic"
> - 3D: when 'Flat' just isn't good enough! -
>
>
> --- In Carrara@(protected), "staigermanus" <philip@(protected)> wrote:
> >
> > I've done another compression, using Mpeg4. Here are the comparisons.
> >
> > http://thebest3d.com/carrara/santa/
> >
> > I'm gonna change the original (uncompressed, 4.7 MB) so that it
> > streams. The others (the compressed ones) are not prepared for
> > streaming in my cases here. I could have, but I think that just adds a
> > little bit to the file size which I didn't want to.
> >
> >
> > --- In Carrara@(protected), "staigermanus" <philip@(protected)> wrote:
> > >
> > > After updating from Quicktime 6 to Quicktime 7 I lost the Pro part
> > > which was in my QT6, so I just upgraded to the pro for QT7.
> > >
> > > Then I went to play with the new H.264 codec which is touted as a
> > > great new feature of 7..... and I have you admit, wow, what a
> > compression.
> > >
> > > I started with an image sequence of about 30 frames of 232x232
pixels
> > > from BT's Santa animation (modeled in Amapi 5, rendered in Poser 4,
> > > remember the old days?). The clip, uncompressed, is about 4.7 MB.
> > >
> > > After compressing to H.261 with medium quality it's 99 kb
> > >
> > > After compressing to H.263 with same it's about 49 kb
> > >
> > > After compressing to H.254 with same settings it's about 29 kb
> > >
> > > WOW. Now that's a case where there's significant amount of
background
> > > pixels that don't change color. Furthermore, the compressed/encoded
> > > animation looked a tiny bit lighter and with less contrast. Perhaps
> > > that's a tradeoff for using that codec. But still, wow. What a
> > > compression.
> > >
> >
>
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