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Color Bleed On NTSC !!!! ,,,,URGENT
Hello all I hope someone can help me figure this out.. Im rendering a black and white video…from vegas, everytime i play it on the NTSC monitor i get color spots on certain places throughout the video. mostly on a mid grey color, i can seem to be able to get rid of them, ive rendered uncompressed, and i still get the color spots flickering , only on my ntsc monitor… ive pretty much run out of options, ive rendered in after effects, and ran it through magicbullet, black and white filter and i have the same results…
i ve not rendered without any fields yet i dont know if that will do anything…
anybody has any ideasthanxs….
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5 Replies
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Hi Juanka. This is not much a suggestion, but…
It sounds as though you have used so much different software that I begin to wonder if hardware might be the issue. Have you tried looking at your output on a different monitor, just to make sure the monitor isn’t what’s driving you crazy?
Lee
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Did you desaturate or use the Black & White filter on the master video out or the track only? I would make sure you’re doing it on the Master.
Lance Bachelder
Southern California
Cow Forum Host- Magic BulletApple Dual 2Ghz G5 ATIx800, 2.5GB RAM, OSX Tiger FCP Studio
Intel P4, 2GB RAM, PNY 6600GT XP Pro – Vegas 6 Studio -
To add to Lance & Lee’s excellent suggestions, look at your output on the vectorscope. If all you ever see is a small dot in the very centre of it, then it’s guaranteed to be black & white and the flickering you’re seeing is a monitor issue.
Mike
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Unfortunately in both NTSC and PAL when you make a B+W image and record to tape the ‘burst’ that carries the chroma phase info of the colour signal is still present and will carry some information and can excite the chroma circuits of some TV’s and monitors depending on their threshold settings. If you have access to printing to tape via component you can just use the Y/G line only and this will give you the luminance component of the YUV signal, just the black and white info in otherwords. When looked at on a WFM set on the ‘flat’ response setting and a Vectorscope you will see no chroma info present whatsover. This is one work-around
Alternately a lot of Pro decks have in their menu selection a circuit called a ‘Chroma killer’ circuit which can be turned on and this will force any incoming signal to be processed as B+W. That’s why this selection is available to ensure that the signal is true 100% B+W. Good luck!
Chris Young
Sydney -
awesome info guys thanxs. ive found a faster work around, is the reduce interlace flickering in after effects, i brought it up. a little and that did the trick..
thanxs for all your replies theyre very insightful
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