In it the camera tracks across the scene and the character in the nearest foreground moves quite fast. I set the motion blur for this scene at 30° so as not to completely obliterate the fine lines of the artwork (not mine). It is rendered out at 1280x720, 29.97 progressive and encoded to MP4 640x360 29.97. It doesnt look as exaggerated in this file, but when played back on the large screen we eventually will be using, the motion is very jerky, not smooth, for the fast-moving foreground objects. The particular problem is with the label "TRIPPIING" which becomes very hard to read.
So the question is what to do to help smooth out the motion? Using interlacing and upping the motion blur are 2 solutions that come to mind, but wondered if there was another, or if there were any opinions about either of these solutions.
many thanks
mm66
Adam Mercado
Influxx Media Production
Motion Graphics & Video Post Production
Fullerton, CA
Re: Interlace or motion-blur : stuttery motion by kevin camp on Apr 1, 2008 at 3:30:35 pm
if your destination is 720p you could go with 60fps (59.94), right now you are only using half the data rate/bandwidth available in hd. that would help to smooth the motion.
you may need to change the camera movement or the 3d depth of the scene to minimize the movement of the problem areas... possibly having the rate of the movement change as it passes over the scene. maybe it can pullback a little quicker so you can truck across the scene a little slower, or maybe it moves more quickly between the 3 sets, but slows as it pass each set letting the motion blur soften less important areas, but keeping the primary scenes nice and clean.
other options may be to modify the art work and heavy up some of those fine lines.
Re: Interlace or motion-blur : stuttery motion by Dave LaRonde on Apr 1, 2008 at 3:31:40 pm
The quasi-technical name for what you're seeing is "judder", and it happens easily with a horizontal motion at certain speeds at certain frame rates.
To avoid it, you can modify the speed at which the camera moves -- speed it up & slow it down at certain intervals. You could add CC Force Motion Blur to the labels ONLY, which seem to me to be the biggest offenders. I also think you could get away with a shutter setting of much more than 30 degrees.
I'd try to avoid interlacing if I could, personally.
Re: Interlace or motion-blur : stuttery motion by Adam Mercado on Apr 1, 2008 at 4:43:20 pm
Dave and Kevin, thanks for the tip. I agree, I was trying to avoid interlace for a number of reasons. The final deliverable is not known yet. It may be PC, DVD or some other device. I think the problem is that the labels are just too close to the camera. I dont have a lot of time to go back and re-animate these sections (there are 8 total) but I could take a look at the worst areas. I did render with some adjustments to the settings last night as an experiment. Tried putting motion blur back to 180, frame rate to 60, still progressive.
Lets see how that looks.
Thank you both for the comments
mm66
Adam Mercado
Influxx Media Production
Motion Graphics & Video Post Production
Fullerton, CA
