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Interpreting footage vs changing frame rate in composition

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Paritosh Srivastava
Interpreting footage vs changing frame rate in composition
on Jun 26, 2016 at 4:36:33 pm

Will interpreting a 25fps footage to 18fps achieve same looks as putting your video in a composition and changing the composition setting to 18fps ? I am trying to achieve a super 8 look here. Interpreting footage throws it off sync with the rest of the effects and audio(lucky for me a bit, as I won't be using the in camera audio.)


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Dave LaRonde
Re: Interpreting footage vs changing frame rate in composition
on Jun 26, 2016 at 4:52:03 pm

If you reinterpreet the footage to change the frame rate, you slow down the speed of the motion a bit.

If you put the un-interpreted footage in an 18 fps comp, the speed stays right but the motion will jerk or jump at times.

If you can't abide either of the two conditions above, you pay about 600 bucks to get Twixtor to do a proper frame rate conversion.

Pick your poison.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Paritosh Srivastava
Re: Interpreting footage vs changing frame rate in composition
on Jun 26, 2016 at 5:04:09 pm

Haha, I chose putting the uninterrupted footage in an 18fps comp. I want that jittery motion as a video recorded at 18fps would have(sort of).
Thankyou for explaining the theory behind it as well.


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Chris Wright
Re: Interpreting footage vs changing frame rate in composition
on Jun 27, 2016 at 7:07:20 pm

to be picky, dropping a 25fps into a 18fps will be super jerky. There is a difference and smoother motion when using optical frame blending which Ae has from 25fps to 18fps. the first method is aken to using the posterize time effect and is very, very jerky.

smoother way-
Choose Layer > Frame Blending > Pixel Motion.
https://helpx.adobe.com/after-effects/using/time-stretching-time-remapping....


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Paritosh Srivastava
Re: Interpreting footage vs changing frame rate in composition
on Jun 29, 2016 at 10:57:24 am

Thankyou, I rendered out my final footage and the results were satisfying. Pixel blending helped.


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