"Zeger Knaepen" <zeg### [at] povplacecom> wrote in message 
news:4557a6e2$1@news.povray.org...
>> > why is every second frame identical to its previous frame?
>>
>>     Is it? How are you seeing this Zeger?
>
> Well, I actually watched it frame by frame using media player classic 
> after
> seeing in the properties that it truly was 24fps (it didn't look like it 
> :))

   Just looked myself, yep, you're right!


> so I upped the frame rate to 12 fps and dropped the file size.
>

> that's the problem: your frame rate is set to 12fps, but that's 
> accomplished by
> doubling each frame.  You should actually render twice the amount of 
> frames for
> a slower animation, and *always* use 24 or 25 fps, for a smooth animation

  Ah, that's great. Thanks for the advice Zeger, that will put me right. 
Another quick couple of questions if I may? So what kind/type of animation 
would it be whereby you actually use a framerate of  7.5, 8 or 12? (I.e., 
lower than the size you recommend). And what about the other way around? 
Faster than 25fps?


>
>> > nice animation though :)
>>
>>    Thank you Zeger. You wouldn't believe how much I enjoyed playing with
>> animation. I think I'm hooked.  :o)
>
> it's fun animating stuff, isn't it :)

   Yes it is. The nice thing is seeing what you've built, and I think if you 
accomplish this and it's what you expected, then imagination kicks in for 
other animation ventures. That's the cool part, I think.  :o)



> can't wait untill I have a Core 2 Quad computer and POV-Ray 3.7, cause 
> things
> are getting really slow now :-/
>
>>     I know I have a lot to learn...
>
> haven't we all :)

    Especially for me, as I am now sourly tempted to go for the IRTC Anims 
round with the present subject...  :)

     Yes, I dream too...


     ~Steve~




>
> cu!
> --
> #macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
> sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
> #end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
> _(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com
>

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"St." <dot### [at] dotcom> wrote in message news:4558c68a@news.povray.org...
>   Ah, that's great. Thanks for the advice Zeger, that will put me right.
> Another quick couple of questions if I may? So what kind/type of animation
> would it be whereby you actually use a framerate of  7.5, 8 or 12? (I.e.,
> lower than the size you recommend). And what about the other way around?
> Faster than 25fps?

lower framerate is never needed, unless you either want to reduce your filesize
or want to imitate cheap anime's :p
faster framerate actually *does* help improve your animation to appear more
'fluent', but a rather fast computer is needed to play them, so use motion-blur
instead.

cu!

--
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com

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"Zeger Knaepen" <zeg### [at] povplacecom> wrote in message 
news:4558e2a1@news.povray.org...
> "St." <dot### [at] dotcom> wrote in message news:4558c68a@news.povray.org...
>>   Ah, that's great. Thanks for the advice Zeger, that will put me right.
>> Another quick couple of questions if I may? So what kind/type of 
>> animation
>> would it be whereby you actually use a framerate of  7.5, 8 or 12? (I.e.,
>> lower than the size you recommend). And what about the other way around?
>> Faster than 25fps?
>
> lower framerate is never needed, unless you either want to reduce your 
> filesize
> or want to imitate cheap anime's :p
> faster framerate actually *does* help improve your animation to appear 
> more
> 'fluent', but a rather fast computer is needed to play them, so use 
> motion-blur
> instead.


Wikipedia has a bit of information on frame rates, as well as (ironically) 
persistence of vision, which helps explain what minimum frame rates might be 
acceptable for your desired outcome:

http://en.wikipedia.org/wiki/Frame_rate

http://en.wikipedia.org/wiki/Persistence_of_vision

I've always taken the approach (as Zeger implied) of choosing my frame rate 
first, and then working out the number of frames to render.  There are 
standards, too, depending on your target medium.  For example, .avi standard 
is 15fps, NTCS film is 23.98fps, etc. etc.


My 'rule of thumb' has typically been not to go below 15fps, and usually 
there's no reason to go above 24-30fps ...although there's an interesting 
comment here on VirtualDub's website about the reasoning behind using 
120fps:

http://www.virtualdub.org/blog/pivot/entry.php?id=103


- How

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Thanks Zeger and How. That's great advice, both.

  You know, I spent about two hours early this morning looking at past IRTC 
animations, (because I can now), and to be honest, I was gobsmacked by what 
was there.

   One of my favourites is in the 'Unnecessarily Complicated Devices' round 
of 2002, entitled: 'Brass and Steel' by Daniel Dresser: 
http://www.irtc.org/anims/2002-04-15.html

    If I did that, I would be proud of myself. I have other favourites too. 
:o)

      ~Steve~

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