This is why it’s important to select a color that won’t be present anywhere in your image. If the person you wish to preserve in the image is wearing clothing that is the same color as the background, their clothing will also become invisible, which will look like a floating head with arms on your video. It’s hard work, but the end result speaks for itself Well, but your screen isn’t green!Īs I told you above, you will choose a color to replace all pixels with the same color, with transparent pixels. So, if you shoot a screen of a specific color, any color, with someone standing in front of this screen, you’ll be able to perfectly “crop” this person on the image and the rest will be made transparent and ready to have another image inserted in the background. This is a video technique in which all pixels of a specific color on the video are made transparent. Now, the time has come for you to really know what you need in order to create incredible videos that will impress your audience! What is chroma key? Therefore, only use it if you really know what you’re doing.” The problem is that it’s an advanced video technique, which makes it difficult to obtain good results. “During editing, you can replace the green color with any image you wish. This article is a continuation of the article on how to setup a home video-recording studio. You can bet that they used chroma key, also known a green screen and other variations of this sort, since the screen color mostly used in this technique is green.Īny idea why they use the green color? You might want to apply this technique to your videos so it’s a good idea to learn how to do it! If you implement this code in the ReceiveProc() using the Video Callback filter, you can apply this code frame-by-frame.You’ve certainly watched a Hollywood movie with scenes in places that don’t exist in real life, or places in which it would be too difficult to shoot, such as the top of Mount Everest. ' then combine by choosing the maximum color valueĬombineCmd.Flags = CombineFastCommandFlags.OperationMaximum ' now with the background fully black, first subtract the foreground from the Background frame (ten times to clear out the area for the logo)ĬombineCmd.Flags = CombineFastCommandFlags.OperationSubtractSource add code that converts frames to raster imagesĭim combineCmd As CombineFastCommand = New CombineFastCommand()ĬombineCmd.DestinationRectangle = New LeadRect(BackFrame.Width - BackFrame.Width,ĭim lowerColor As RasterColor = New RasterColor(90, 0, 90)ĭim upperColor As RasterColor = New RasterColor(255, 100, 180)įoreFrame.AddColorRgbRangeToRegion(lowerColor, upperColor, RasterRegionCombineMode.SetNot) The code for overlaying each frame image from the foreground on the background will look like this: Dim BackFrame As RasterImage (Disclaimer: I am an employee of the vendor of this toolkit). On top of the background video from your USB Camera frame by frame. If you have the foreground video already with a uniform-color background, you could do this using the Playback Control from the LEADTOOLS Multimedia toolkit (), which can be used to overlay the foreground video ![]() ![]() Ideally, the video should available in any other way such as a standard-format video files like AVI, MPEG or MP4, or from a second capture device such as a webcam. Is that foreground video only generated by your old program? Or do you have some other way of obtaining it? ![]() However, you did not say where the foreground video (that contains the You mentioned the background video as coming from an old video card (probably what was called a frame grabber). There's a very important piece of information missing from your question.
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