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really bad quality

Posted: Sun, 3rd Jan 2010, 11:24pm

Post 1 of 11

FXhomer116676

Force: 400 | Joined: 29th Dec 2009 | Posts: 6

CompositeLab Pro User

Gold Member

when i upload the video i made with the green screen i black out the green screen and i added a picture behind it but when i play the video the quality is really bad like it skips and the video i put to replace the green screen gets worse and worse until you can actally see the full green screen behind it. any tips on how to fix this

Please&Thankyou!
Posted: Mon, 4th Jan 2010, 12:05am

Post 2 of 11

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

"Bad quality" could mean many different things. We'll need a bit more info to accurately diagnose the problem.

Is the 'bad quality' you are referring to happen within the program, or after you render to a new video file, or both?

When you say 'bad quality', are you referring to a bad key, wherein the edges of the greenscreen element are jagged, or perhaps soft, or just not at all accurate?

If the key gets worse over time, that would suggest that one of two things is happening:
1. You have keyframes you don't need. You have set up keyframes (perhaps inadvertantly) that are changing the key settings over time, resulting in more of your foreground element being eaten away by the key.
2. You need keyframes you don't have. The lighting or exposure in your footage changes over time, requiring keyframed adjustments as thing change, and there are no keyframes there.

And, as is always the case in these situations, if you can please provide a link to a short clip of the original footage, or at least an image of a single frame, it would be very helpful. Its quite difficult to identify the problem with a picture without seeing the picture.
Posted: Mon, 4th Jan 2010, 12:20am

Post 3 of 11

FXhomer116676

Force: 400 | Joined: 29th Dec 2009 | Posts: 6

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Gold Member

idk how to get a picture to a link but pretty much when it starts it looks ok and when i click play the video behind it like disapears and at the end the person is behind the green screen again idk if that helps at all
Posted: Mon, 4th Jan 2010, 1:16am

Post 4 of 11

Fxhome Dude

Force: 996 | Joined: 1st Jun 2009 | Posts: 927

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This sounds like a case of when you import a picture from maybe a usb device, and then remove the device, thus causing the image to go "offline and the result is what you are experiencing. Is this the case?
Posted: Mon, 4th Jan 2010, 1:20am

Post 5 of 11

FXhomer116676

Force: 400 | Joined: 29th Dec 2009 | Posts: 6

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i dont think so bc i still have all the stuff saved to my computer
Posted: Mon, 4th Jan 2010, 5:54am

Post 6 of 11

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

To post a link you have to upload the image to a webhost somewhere, such as www.imageshack.us and then type a link to the file in your forum post.

It doesn't sound like an offline issue to me. Still sounds more like incorrect key settings, keyframed incorrectly, as I originally described.
Posted: Mon, 4th Jan 2010, 7:39pm

Post 7 of 11

FXhomer116676

Force: 400 | Joined: 29th Dec 2009 | Posts: 6

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http://img705.imageshack.us/content.php?page=done&l=img705/5373/greenscreen.jpg&via=mupload
Posted: Mon, 4th Jan 2010, 8:00pm

Post 8 of 11

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Is that the entire image? Sorry, but I can't even make out what it is supposed to be, in any of the three stages. I appreciate your taking the time to upload this, but is it possible you can upload full frames? Having some context will help, I think, in identifying the problem.
Posted: Mon, 4th Jan 2010, 8:31pm

Post 9 of 11

FXhomer116676

Force: 400 | Joined: 29th Dec 2009 | Posts: 6

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http://img12.imageshack.us/img12/5413/weirdd.jpg
hope this helps
Posted: Tue, 5th Jan 2010, 12:46am

Post 10 of 11

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Yeah, it does, thank you. I still think its a case of inadvertant or unwanted keyframes. Can you provide some feedback on that issue, so we can go from there?

Though even if that is the case, to get that kind of artifacting you've either got some really less than ideal lighting, or the footage was compressed quite heavily, or both. the squareness of the artifacts makes me suspect that compression is involved. Did you shoot this yourself, and if so, can you provide the sequence through which it got from the camera to CompositeLab? Otherwise, can you let us know where it originated?
Posted: Tue, 5th Jan 2010, 1:38am

Post 11 of 11

FXhomer116676

Force: 400 | Joined: 29th Dec 2009 | Posts: 6

CompositeLab Pro User

Gold Member

im not really educated with this stuff so im not sure what a keyframe is and how to fix it