AE 6.5 Flicker NTSC 24 AP

[3dgurl]

???

Has anyone had problems with both Adobe After Effects 6.5 and Adobe Premiere Pro 1.5 causing "flicker" with 24 AP footage from the AG DVX 100AP?

I have a clip that i have tried to process 2 or 3 times. One very neet filter called "Remove Grain" that does a wonderfull job cleaning up noise from being shot underlit with DV and "Shadow/Highlight" which is self explanatory to Photoshop users.

Everytime I render I get verying levels of luminance in each preceeeding frame. These are not present in the the material without the effects applied. It looks like an "old-movie" effect sort of flicker.. but it is visible to the naked eye if you step through the rendered video but not when composing the COMP.

I've tried "interpreting" the footage as "guess Pa pulldown" and it comes out as WWSWW (24P Advance.) But i get the flicker on render out to MS DV and Canopus DV... Same can be said for porting the filters into Premiere Pro and working in a project set up as Panasonic 24 AP.)

Is there any settings I am missing in the render....I am rendering out without fields.


Any idea or settings adjustments would be appreciated .... It's not really inportant as it isn't for a "job" I am just sort of checking out the workflow in the video colection in regards to shooting 24 PA and compositing with that footage latter.


Thanks for your time

[kecorcoran]

I haven't seen the problem yet in AE, but a lot of users have definitely seen flickering in Premiere Pro 1.5. I've tried to reproduce the problem and from my observations, it seems to happen in overexposed areas in the frame, such as sky.

The flickering seems to get introduced in 24pn footage on import (when the pulldown is removed), and in 24pa footage on Export to AVI or Print to Tape (when a new 3:2 pulldown is added) although MPEG export seems OK.

In my tests, adding the Premiere Pro 1.5 "Broadcast Colors" filter to limit luminance to IRE 110 seems to get rid of the problem. Others tried this as well and said it worked, but at least one person was still seeing problems.

Let us know if this helps any.

[3dgurl]

Thank you for the tip but I think I realize what i did wrong...

I was just at Adobe's "Desktop HD Tour" in Toronto and I recieved a free DVD with promotion tutorials from Total Training.. in both the AE 6.5 tutorials and the Prem pro 1.5 tutorials on the disk they mention both the "shadow/highlight" and the "remove grain." filters. With my limited experience with them I hadn't realized that the "shadow/highlight" is a pretty complicated filter and is computed on a frame by frame basis but with no reference to the frames around them so each frame is differing because the filter is fixing the shadows in each frame individually . ( I know this should have been obvious!) Short story long it makes a really beautiful image out of badly lit and under exposed material that has too much detail!

If you use just the "remove grain" then play with the saturation and colour/contrast with Color Finesse's Synthetic Aperture you can get a moving image that is almost as appealing but with none of the flicker associated with the "shadow/highlight" filter.

This works with both AE 6.5 and Premiere Pro 1.5 as long as you interpret you footage with the 24 PA pulldown and use a 29.97 comp in AE or in Pro 1.5 use a 24 PA project setting and do not change your output module setting that are paired with the 24 pA project settings.

Now if sombody could just come out with a "realtime DV25" 1394 card that has an onboard GPU for Adobe Premiere Pro effects with 24 fps 16 x 9 footage I would be happy. I have an AMD 64 3400 with 1.5 GB RAM and I am still not getting anything close to a realtime analogue preview out of my Matrox Parhelia card and Prem Pro.

My DVStorm does a great job with DV25 4 x 3 29.97... i guess I have jsut become spoiled!


Thanks again for the help.