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Help with “BOILING EDGES” while Keying in AE7
I need serious help. I am not a pro at keying and new to video editing in general so I’m having a hard time. I’ve read the tutorials here and at numerous other sites to no avail. Here’s the problem;
I shot 15 seconds of video on a Sony MiniDv DCR-HC46 (don’t laugh). I have a subject standing in front of a green screen, pretty evenly lit. I captured the video in Premiere Pro, editing the length, and exported an uncompressed avi with alpha channel.
When I load this into AE7 and apply keylight (for example, I’ve tried alot of different keyers), I can’t get rid of the “boiling edges”. I sampled close to the subjects body. I’m using a tight junk matte. But still…it’s boiling especially around the hair. It boils more or less in different keyers but keylight seems to be the least but it is still very noticeable.
Can anyone help me out before I lose my mind?
I’m thinking that its the camera quality. If it is, I want to quit now and re-shoot it. If you have any experience in this let me know.
I will be forever grateful.
– Jason
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4 Replies
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Thanks Dave, I really appreciate the info.
For anyone else in my position, this morning I was able to get an acceptable result using Primatte keyer. I stacked it on top of Pinnacle Composite Wizard’s CW Smooth Screen and Denoiser. I then used the CW Matte Feather after those plugs.
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DVs 5:1 compression noise near contrasting edges (like at the edge of y our talent and the green screen) makes green screen keying much more difficult. It also uses 3:1:1 color
try oftening and choking your matte
or try shooting it on a camera that can give you better color and no comression like the ag-HVX200 it shoots in 4:2:2 color and you can shoot uncompressed to the P2 card and avoid alot of the compression noise -
Sorry to intrude:
– DV NTSC is 4:1:1, not 3:1:1 (DV PAL is 4:2:0)
– The HVX200 shoots to the DVCPRO HD codec on the P2 card, which is basically DV100, whereas “regular” DV is DV25. Not uncompressed, but not heavily compressed either and certainly better than DV25. And yes, it’s 4:2:2.DV Garage has a keyer that apparently works well with DV, but if you search the COW for Keylight, you should find some tips.
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There is a great chromo blur preset made for keying DV footage
https://support.thefoundry.co.uk/tutorial/dvchromablur/dvkeychromablur.ffx
(to use it, save it, in AE go to animation-apply animation preset, select the ffx file)
I use it everytime with great results
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