Hello,
I have a couple of animations that only work satisfactorily at 60 fps using
AVI with MPG-4 compression. The problem is that the end product is a
screensaver, and the screensaver program doesn't like AVI at 60fps. It seems
to like MPG's better in general, but I can't seem to get an MPG to work at
all at 60 fps; it breaks the picture all up and scatters it all over the
screen. I've tried Videomach, TGMPGE, and BBmpg. Anyone have any
suggestions?
If you want to, you can download the AVI files at
http://www.shelbyvision.com/samples.htm
The two in question are "Orbiter" and "PlaneWords"
Thanks,
Steve Shelby

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Hmm.. what do you mean by "work satisfactorily"? 60fps seems way over the
top to me. 24/25fps is ample for tv/film to achieve the 'persistence of
vision' effect. Is it that your anim would be too slow at these frame rates?
(sorry, I haven't looked at them). Maybe an option would be to somehow
re-scale them so that they run at the correct speed at 24fps.

Sorry if I have misunderstood your problem.

BTW You could add VirtualDub to your list of AVI encoding progs. It's
feature-packed.

All the best,

Andy Cocker

"sshelby" <ssh### [at] rexnetnet> wrote in message
news:3b955199@news.povray.org...
> Hello,
> I have a couple of animations that only work satisfactorily at 60 fps
using
> AVI with MPG-4 compression. The problem is that the end product is a
> screensaver, and the screensaver program doesn't like AVI at 60fps. It
seems
> to like MPG's better in general, but I can't seem to get an MPG to work at
> all at 60 fps; it breaks the picture all up and scatters it all over the
> screen. I've tried Videomach, TGMPGE, and BBmpg. Anyone have any
> suggestions?
> If you want to, you can download the AVI files at
> http://www.shelbyvision.com/samples.htm
> The two in question are "Orbiter" and "PlaneWords"
> Thanks,
> Steve Shelby
>
>

Post a reply to this message

Andy,
The problem is the distance the object moves from one frame to another. If
I use half the total number of frames and use 30 fps, the speed of the
object is the same, but the distance the object moves with each frame is
twice as much, so the result is what looks like a double image; you always
see two frames at once. The only way I have been able to solve the problem
is to double the number of frames and use 60 fps. I can also eliminate the
double image by doubling the number of frames and using 30 fps, but this
makes the movement unrealistically slow.
BTW, Virtual Dub is the program I use for AVI's. It is a great program. One
of the things I like most about it is its speed. It makes it a lot easier to
experiment with different settings. Those other programs I mentioned are
what I use to convert to MPG.
Steve
Andy Cocker <big### [at] mariner9fsnetcouk> wrote in message
news:3b95943e@news.povray.org...
> Hmm.. what do you mean by "work satisfactorily"? 60fps seems way over the
> top to me. 24/25fps is ample for tv/film to achieve the 'persistence of
> vision' effect. Is it that your anim would be too slow at these frame
rates?
> (sorry, I haven't looked at them). Maybe an option would be to somehow
> re-scale them so that they run at the correct speed at 24fps.
>
> Sorry if I have misunderstood your problem.
>
> BTW You could add VirtualDub to your list of AVI encoding progs. It's
> feature-packed.
>
> All the best,
>
> Andy Cocker
>
> "sshelby" <ssh### [at] rexnetnet> wrote in message
> news:3b955199@news.povray.org...
> > Hello,
> > I have a couple of animations that only work satisfactorily at 60 fps
> using
> > AVI with MPG-4 compression. The problem is that the end product is a
> > screensaver, and the screensaver program doesn't like AVI at 60fps. It
> seems
> > to like MPG's better in general, but I can't seem to get an MPG to work
at
> > all at 60 fps; it breaks the picture all up and scatters it all over the
> > screen. I've tried Videomach, TGMPGE, and BBmpg. Anyone have any
> > suggestions?
> > If you want to, you can download the AVI files at
> > http://www.shelbyvision.com/samples.htm
> > The two in question are "Orbiter" and "PlaneWords"
> > Thanks,
> > Steve Shelby
> >
> >
>
>

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Hmmm.  Why not just render at half rate (all clock variables being divided
by two) and compile to 30fps?  The number of files to render would be halved
and that much faster to create.

Bob H.

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sshelby wrote:
> 
> Andy,
> The problem is the distance the object moves from one frame to another. If
> I use half the total number of frames and use 30 fps, the speed of the
> object is the same, but the distance the object moves with each frame is
> twice as much, so the result is what looks like a double image; you always
> see two frames at once. 

Looks like a problem in the setting of 'interlace/progressive' when encoding
the movie. When you said at 60 fps, are the frame full (progressive)
or half-picture (even/odd lines : interlaced) ?
Or have you mixed both settings ???

Post a reply to this message

I'm not sure about the answer to your question. I use Moray with the Enzmann
animation plugin to make my animations. I use AVI MPG-4, V1. There is no
input for configuration, except compression and bitrate. I then Use
VirtualDub to get further compression and other changes. I always use the
de-interlace filter.
I just checked my archives and found four versions of the airplane
animation, all with 240 frames, one at 10fps, one at 15fps, one at 30fps,
and one at 60fps. the only one that does not have a double image on the
leading edge of the wing is the one at 60fps.

news:3B95D61F.AF13B2EE@atosorigin.com...
> sshelby wrote:
> >
> > Andy,
> > The problem is the distance the object moves from one frame to another.
If
> > I use half the total number of frames and use 30 fps, the speed of the
> > object is the same, but the distance the object moves with each frame is
> > twice as much, so the result is what looks like a double image; you
always
> > see two frames at once.
>
> Looks like a problem in the setting of 'interlace/progressive' when
encoding
> the movie. When you said at 60 fps, are the frame full (progressive)
> or half-picture (even/odd lines : interlaced) ?
> Or have you mixed both settings ???

Post a reply to this message