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Can you post a still frame somewhere of the problem footage? It sounds like you may be getting too much spill, or even some lensflare, across the subject. If you are choking the matte too much, variance in the spill can have dramatic effect on edges.
Unfortunately, HDV is a notoriously bad keying format as well, due to the high compression.
I've uploaded a section of the video to Youtube with a plain background.
It's scaled and of couse Youtube quality isn't great but hey, there it is, I hope you can see what I mean by looking at the guy's left ear!
You can find it at
As regards your statement "HDV is a notoriously bad keying format as well, due to the high compression" I'm wondering what's the solution to that?
I've posted in your other thread re: your second question.
Re: your YouTube clip, it's certainly a pretty grimy looking key. The blockiness on the edges actually looks like the footage has been deinterlaced - is the footage interpreted correctly?
Is there a depth-of-field problem? The pictures look soft along the edges to me - are you using plenty of light in your shoot?
I could get a clearer idea of the issues by looking at the original footage, rather than the post-keyed stuff. Sorry if I didn't explain that before.
That clip has been scaled to about 200% so you can see the problem better. That might explain why it looks so bad!
It's not deinterlaed footage so I think it's interpreted correctly. The project is HDV 1080i 25 with original files from the FX1. I also think the lighting is sufficent but I'm prepared to be corrected on that!
Thanks for your help. Should I post some of the original (and 100% scaled) footage?
The 200% scale explains the blockiness.
Just a single frame high quality JPEG or PNG of a problem frame would be fine.
Did you get the email Andrew, with the file?