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Some questions for the experts
Hello , and thank you in advance for the help.
I have a blue square graphics in a black baground I wanted the black to dissaper so I could see through to another video but the leave the blue graphic in front. I did this using Chroma Key and selecting the black with the dropper.
Now everything worked as I wanted but the problem is that I get a black border around my blue square graphic. I dont want that black outlining parts of the square(it didn’t key out) how do I get rid of it?
my second question is , I want a 130 angle drop shadow in my text, I go to effects in the text box and I chekmark “draw shadow” and move the x offset and y offset but how do I know what number is the 130degree angle ?
thank you again
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6 Replies
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No idea on the black border, sorry, but using trigonometry, to get 130 degrees, you need an x of -0.643 and a y of 0.766
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I’m a little confused as to why you would chroma key out the black background. If I understand you correctly you have a track with media generated black color with a blue graphic in the foreground and you want to remove the black background and have the graphic remain behind the blue graphic while revealing another video. The easier way to do this is to insert your video on the bottom track and place in the timeline where you would like it to appear. Then simply either cut the black background at the same time or lower it’s opacity an envelope an add the nodes along it. Chroma key allows other things to show through and if you are removing the black and it is the top track then you will still be left with black everywhere else. Let me know if this helps or I am missing the point.
Joe -
Thank you Steve and Joe for the help
I am uploading an image for you to see the problem . I am new to Sony Vegas so detailing the process on how to get rid of the black lines that remain , would be helpful .
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If the blue box is not moving or animated, I’d draw a beizer mask around it with tangents at corners.
Or duplicate the Blue box layer,
switch composition mode of the upper layer to Mask,
make the lower layer a child track,
go in track motion of the upper track and scale down the Mask layer size a bit to crop the black areas out. -
thank you Omer
I found out what I wanted , in order to get rid of the black outlines
just select the clip go to properties alpha channel an select premultiplied .thanks again
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