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Moire
Just submitted this to the wrong forum (Apple). Resubmitting it here.I have submitted this problem to Adobe forums with no satisfactory answer. I am not a professional, so can use help.
Video Camera: Canon hmf 41, filming in auto mode, (MXP), 1920×1080(i ?). Mts files from video camera copied to hard drive, imported into CS5, Premiere and After Effects.
Conditions. black background, room lighting from above (incandescent chandelier), extra light thru windows; “test” subject has yellow shirt with criss-cross , blue, white and red stripes; “real” subject: purple patterned shirt, no glasses.
Plays PERFECTLY to TV from camera: i.e., hdmi from camera to TV.
Then: Bad Moire problem with Premiere and After Effects (Vista 64 or Win 7) on both computer monitor and same TV set, particularly for the test subject. The effects are not simply on the shirt, but also on the glasses frame. No moire with media player 12 on Win 7 computer. Moire does not appear in a single frame export from Premiere, so I can’t show it.
A software problem? Can’t seem to change upper to lower frame first in the HD presets. Gaussian blur reduces some of it, but I don’t like the results. Using DV NTSC preset (4:3?) eliminates problem, but would like to have it in 1920 x 1080.
Exporting the 1920 x 1080 mts file to mxf format, progressive, eliminates moire, but reduces it to 1440 x 1080.
Questions. Since I plan to be conducting many interviews, I would like to eliminate the moiré to begin with, so don’t have to export, etc. There will be enough editing as it is. What are the consequences of the reduction from 1920 to 1440? It seems that keeping 1920 would be better.
I don’t see how blaming the camera and the subject’s clothing are satisfactory answers to the problem, because the direct connection from the camera to the TV does not show the problem. And also because some software works OK, i.e, media player 12, and exported mxf format works OK with Adobe CS5.
Thanks very much for any help!!!
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5 Replies
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What is your connection from Premiere/AE to the TV (what hardware do you use)?
And, is your Premiere preview set to “full quality/100%”? It sounds like a scaling issue somewhere along the line. (Media Player probably uses a different scaling algorithm).
BUT: you should really avoid checks, seersucker, plaids, houndstooth, and other tight patterns for interviewee clothing. It will lead to moire _somewhere_ down the line. Plus, they tend to distract from the interviewee.
-Jeff
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You can’t judge it on a computer.
Cam plugged into TV set looked fine. Don’t worry so much.
But also, avoid the problem situations when shooting like mentioned.Chris Tompkins
Video Atlanta LLC -
What are your final output specs? Is it going to web or broadcast? Is your “TV” a progressive LCD or interlaced CRT Monitor?
Try to export a 10sec test to your output spec and view it on a reference of what your final should be viewed on and see if you still have issues. If you do than some more troubleshooting is in order.
Agreed that in order to not have those problems pop up, you should avoid introducing patterns that could potentially lead to moire in the first place.
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As said on the other forum. Its not a moire problem but a interlaced problem. The coombing effect is very much present.
Cant find any specs for the camera, unknown canon model.———————————————–
Adobe Certified Expert Premiere Pro
Adobe Community Professional -
As Ann said, we’ve seen your images, and the problem is a field order issue; you have combing because of bad handling of interlacing. It has nothing to do with moire.
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Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
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