I recently faced a problem I never had before.
I made a video sequence using After Effects and 3D layers. Nothing has been filmed, it is completely virtual. It seems that some of my pans have a speed that makes them "stutter", or "judder", flick, jump, shake, or I don't know what is the exact term.
It does not shows up on a "regular" computer video output; but when conforming the project, it clearly shows up. I can also see it on a computer that has a BlackMagic video card output.
Here's a sample : https://vid.me/AavQ
I've read that a lot of people got this problem. English is not my mother tongue, so I'm not sure I understand everything, but there is even a post on Adobe.com about it : Avoiding Judder in Motion Graphics.
I'm looking for a technical solution to fix this. My movie is and should remains 25 fps, noninterlaced. The timing of my movement should basically remains the same because I can't afford retiming the whole movie (48 mins).
I already did try to play with the shutter angle, the motion blur (and number of samples); to force the blur with CC force motion blur, to slightly change the movement timing... But none works. Even if I set a very high level of blur, it keeps "blinking".
There is also an interesting topic about it here, where a guy eventually says:
Try panning the R, G and B channels at slightly different speeds. There is a correct order but DS guys have done this for years.
I still should try that but I wonder if this is not too much complicated and I'm not sure I know how to do that.
I would be very interested by your feedbacks and ideas about all that.
Thanks for your help !