different framerates
by Anne Kochan
on
Aug 11, 2008 at 3:30:55 pm
hi there.
i am working on an animation project. i am using tiff-sequences that are animated 12 fps as footage, means the image is changing every second frame.
now my problems is the camera movement. my character is moving on the x-axis, the camera should follow, the background is not moving. if i change the camera position by interpolated keyframes the camera position changes every single frame so every second frame the character is pulled back (which looks like it is sliding).
my question is can i change the framerate of the camera movement or is there any other trick avoiding this sliding effect? thanks for any help!
Re: different framerates by Dave LaRonde on Aug 11, 2008 at 4:04:41 pm
As long as you've properly interpreted your tiff sequence in the Interpret Footage window, so you KNOW the frame rate is 12 fps, the answer is simple: work in a 12fps comp. You can nest this 12 fps comp in a comp of a different frame rate later.
Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA
Re: different framerates by Kevin Camp on Aug 11, 2008 at 4:56:56 pm
if you do later nest the 12fps comp into a comp of a different frame rate, in the comp settings (of the 12fps comp) click the advanced tab, then click the option for 'preserve frame rate when nested'. this will prevent ae from re-interpolating any keyframed animation in the comp of a different frame rate... otherwise you'll see the issue you are currently seeing, where ae is interpolating the animation at a different frame rate than the footage.
if you need to get this up to 29.97fpst for broadcast or tape at some point... you may want to change the image sequence frame rate to 11.988fps and work in that frame rate. this will allow you to place the comp into a 23.976 (24p standard) comp which will add a duplicate frame for each frame, but will allow you to add a pulldown and properly bring the footage up to 29.97fps.... otherwise i think you'll have math issues later on... of course you could work in 12fps, render, import and then re-interpret the render as 11.988 to render at 23.976 or 29.97 later...
