"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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