View Full Version : Jittery slow motion HDV in FCP6 after rendering


Jimmy Conway
October 1st, 2007, 03:46 AM
I get a jittery footage after rendering my slow motion clips in HDV in FCP6 in the timeline. I need to turn in this movie in tomorrow as a DV quicktime file and DV tape. Any quick ways to fix this problem? Any help is appreciated. Thanks.

Adam Oas
October 2nd, 2007, 05:26 PM
Can you explain jittery a bit better?

Was the footage undercranked? What is your workflow? Do you have something besides FCP to do the slow mo?

Matthew Gore
October 2nd, 2007, 08:19 PM
Make sure that you have the frame blending box checked.
This helps many times when slowing down DV footage.

Good Luck
Matt Gore

Oliver Smith
October 8th, 2007, 04:28 AM
Did you shoot progressive?

Greg James
March 10th, 2009, 07:20 PM
I just had this same problem when I was working with HD footage that was rendered on a standard definition (720 x 480) anamorphic wide-screen timeline in FCP. I'm sure part of the problem lies in the fact that FCP has to work that much harder for HD and then you have the distortion when bringing into a standard format. When you add slow-motion, it creates the jittery effect. Well, instead of having frame blending selected (as is the default setting in FCP), I unchecked this, and then applied it to all my clips. And then, yippee! All worked about as good as I could hope. Still not "as perfect" as I'd like, but definitely more manageable. Again, whatever slight variation there is after that I think is caused mostly by the HD translation in FCP - but, don't quote me on that.

So, just uncheck frame blending and see what happens. In fact, you should probably try both ways anytime you work with speed change. You may be surprised by the results.

Good luck!

Nicholas de Kock
March 11th, 2009, 02:49 PM
I don't know if you have seen any cinema movies lately, watched Bride Wars, all their slow motion footage is jittery, I see this in many high budget movies, remember that jitter = quality in the screwed up world of high budget movies. Don't be so hard on yourself, 24P slow motion is the way to go.

Mike Barber
March 12th, 2009, 10:34 AM
send your clips to Motion and use the optical flow option for retiming your clip. read more about this in the Motion user manual, it is the better way to acheive smooth slow motion.