frame rate change

[garrett]

Hi

I'm not a digital video producer but I'm working on a simple video which I need to change the frame rate of and which will then be put in an application to control it.

I have a very long video which runs at five frames a second, this will be transformed to one frame a second. My first question is when I bring this frame rate down will it really be one frame spanning each second or are frames assigned a certain duration, say 1/24 of a second, so that one frame is actually there 24 times? Second question, changing from five to one frames a second, which frame of the five for each second is choosen?

And last question, is there a means for me to extract one frame from each second, does'nt matter which one as long as its always the same, make it a single frame of my movie (I suppose this means speeding up the movie) and maximise compression for the application I am going to play it back in?

thanks in advance
gar

[setarip]

A framerate of 1fps means exactly that - One frame will stay on screen for one second. This will appear to be a slide show of still images...

[garrett]

...so if i want to speed up that 5 frame a sec movie do I knock it down to 1 frame a second then back up to 1 frame a second and it will be 1/5 the duration (or 5 times faster)??

[shiny#3]

reread setarips post carefully.

1fps means one frame will be displayed in one second.
if you like to display 5 frames per second the
right value would be 5fps.

be careful when you mathematically speaking inverse fraktion.
5 frames per second means 5/1 f/s where f/s is the unit.


you have been using the inverse fraction 1/24 or 1/5 or 1/1.
if you do so, also inverse the units which then yields s/f,
second per frame.

that means one second is devided by 24 or 5 or 1.
the larger the denominator gets the shorter the time interval
gets between farmechanges.