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footage is pixelated - can someone check if this is normal?

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florian herweg
footage is pixelated - can someone check if this is normal?
on Aug 2, 2011 at 2:27:39 pm

I got some greenscreen footage I am supposed to key. the problem is that the footage is really bad. I can deal with the noise and the grain but I am very concerned about the fact that everything seems very pixelated.

i would really appreciate if someone could take a look at one test clip and confirm that I am not blind. the DP messed up in my opinion. something's very wrong here.

here is the link to the test clip

thx a lot


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steve agriosi
Re: footage is pixelated - can someone check if this is normal?
on Aug 2, 2011 at 3:37:28 pm

nope .it's not pixelated.
it's typical H.264 compression.
All u need is some enhancement to get rid of this artifact.
Try Neat plugin or denoiser by RedGiant
But in some cases depending on the composite background u can get a decent key without any denoiser.
Also a deartifacter plugin can be the solution.
check Red Giant Composite Wizard.
good Luck


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Peter Burger
Re: footage is pixelated - can someone check if this is normal?
on Aug 2, 2011 at 8:34:20 pm

I'm with Steve. Footage seems to be o.K. I had to key worse ;)

If you're using After Effects for keying you could put an adjustment layer with the median filter (value between 2 and 4) applied to it above the footage. Set the transfer mode of the adjustment layer to color and precomp the two layers and then try keying.

The median filter in color transfer mode reduces color-compression artifacts. Most useful with 4:2:0 material like yours.

HTH

------------------------------------------
"Tragedy is a close-up; comedy, a long shot." - Buster Keaton


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Dave LaRonde
Re: footage is pixelated - can someone check if this is normal?
on Aug 3, 2011 at 7:15:04 pm

A slow drive on the desk machine prevents play in real time, to say nothing of audio syncing with video.

Is the viewer supposed to see the talent walk into the shot? If so, you've got some lovely rotoscoping to do!

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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steve agriosi
Re: footage is pixelated - can someone check if this is normal?
on Aug 3, 2011 at 7:41:40 pm

Apart of a slow drive i think the core is responsible for a choppy
playback, cause i have an Acer Aspire Intel Core i5 which plays my DSLR 1080 perfectly.
Btw y you recommend roto? u don't talk about garbage masking right?
cheers


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Dave LaRonde
Re: footage is pixelated - can someone check if this is normal?
on Aug 3, 2011 at 8:13:06 pm

[steve agriosi] "Btw y you recommend roto? u don't talk about garbage masking right?"

The key question is this: does the talent walk into the shot? Yes or no?

If the talent is intended to walk into the shot and stand center screen, you HAVE to rotoscope. The guy's over a white background on the right side of the screen. You have to get him off that white background. That means you have to rotoscope. Garbage mattes are not allowed.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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steve agriosi
Re: footage is pixelated - can someone check if this is normal?
on Aug 3, 2011 at 8:35:17 pm

as long as i remember the shot that florian herweg posted,
was about a guy making 3-4 steps to place him self against the green screen.
So I guess they used a green backdrop as large as they needed
The rest seemed to be a matter of editing, garbage masking and a good key.
So i don't think they need to do any roto, unless they need to composite a complex shot.
Anyway you are possibly talking generally for the steps of a process, so i might misunderstood.


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Dave LaRonde
Re: footage is pixelated - can someone check if this is normal?
on Aug 4, 2011 at 3:58:49 pm

[steve agriosi] "you are possibly talking generally for the steps of a process, so i might misunderstood."

No, I'm asking YOU if you believe that the talent walking into the shot is part of the completed shot. I can't tell on the slow computer at my desk.

If you say, "No, that is NOT part of the completed shot," then no rotoscoping is necessary.
If you say, "Yes, that walk-on appears to be part of the completed shot," then rotoscoping IS necessary.

You can tell. I can't. So which is it?

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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steve agriosi
Re: footage is pixelated - can someone check if this is normal?
on Aug 4, 2011 at 4:11:55 pm

OH..ok got ur point.
I'm sorry but i did a quick check on this shot the other day
and deleted it right away, so i don't really remember the cue point.
But i assume the did a good work on preparation/filming.
So the only thing the have to look after is a decent Key.
Only florian herweg can give us a feedback about.


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steve agriosi
Re: footage is pixelated - can someone check if this is normal?
on Aug 4, 2011 at 9:31:06 pm

*they


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