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Chroma Key Renders
We are attempting to use After Effects to do some chroma keys. Once we import the files into Final Cut Pro, the clips look strange, almost like they are playing at a slower frame rate. These files were rendered with field render turned off. I thought maybe that was the problem and have rendered again with field rendering set to lower field first. That has taken care of the “funky look” problem, but the files with the lower field rendering look blurry.
Here are the settings we used for the render: Quality-Best, Resolution-Full, Size-720×480, No Proxies, Effects-Current Setting, Frame Blending-On for Checked layers, Field Render-Off, Pulldown-Off, Motion Blur-On for checked layers, Frame Rate: 29.97.
The only thing I changed on the second render was changing field render to lower field first, which as I said made the chroma key look blurry.
Do you see anything wrong in these settings that might be causing problems?
Thanks
Jeanne -
3 Replies
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Isn’t NTSC upper field first ? Might be wrong but I think it is. But I live in a PAL country.
The blurry look might be a field reversal problem.
What Codec do you use? Try Quicktime Animation, gives great results.
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Is your footage interlaced?
I don’t believe you are suggesting the edges are bad but that the overall image is soft.If your footage is interlaced, make sure your footage is set to Lower fields first for NTSC and that the rendered is also set this way.
You can also try to to separate fields to none and render no fields as long as your final output is interlaced this should also work.
Now are you using a high quality codec, most people suggest qt animation but tent to use photojpg at about 98 percent.
either way depends on disk space.good luck
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Thanks for the suggestions. I changed interpret footage to none and then rendered the composition with lower field first and that solved the problem.
Thanks
Jeanne
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