Since 2020, it seems every upgrade to Wirecast makes keying easier. We plan to paint our main studio green and ditch the chromate stuff the summer. Surprisingly, the key works better tin that studio than in our main studio with the chromate curtains and light rings. We do not have dedicated lights for the green wall. We only use three point lighting for our talent in that studio. That studio uses a tradition green painted wall. We also have a second studio we incorporate in shows from time to time. All camera angles have geometry-specific backgrounds, ether purchased from third parties or created in-house. Currently we use chromate curtains and green LED light rings on three cameras in our main studio for multi camera shoots. This is a primary reason we use Wirecast. We have become quite adept at it actually. We have produced over 200 talk shows using Wirecast and virtual backgrounds. Wirecast warns you if High-Quality Video is turned off when you turn on Chroma Keying. This forces Wirecast to decode the video from disk in the best quality possible, giving the Chroma Key the best data possible. High-Quality Video If you are keying video from disk and not capturing it live, make sure the High-Quality Video option is checked in the Advanced Preferences Panel. If you have a choice, a PAL camera is better than NTSC, due to how data is captured internally. But if you have excellent lighting, a USB camera works well. If you use a cheap USB Web-cam, it may not give you enough source quality to get a reasonable good key. However, the better the camera, the better the keying. Wirecast has been tested with a low-end DV camera to verify the quality of its Chroma Keying system. Good Camera You should get a reasonable quality out of most cameras on the market today. An office whiteboard may be helpful in accomplishing this. The more evenly lit, the better the keying. Light the background screen evenly, with no shadows. The background screen (green or blue) needs to be independently lit from other items in the shot.
Wirecast chroma key how to#
Invest in good lights and learn how to set them up properly. Lighting Assuming you had a reasonably good camera, the most important part of getting a good key is good lighting. Tips for Getting a Good Key Probably the most important part of getting good source material, Poor source material generates poor keys, no algorithm can make up for this. Adjust the White Clip (0 to 100) by using the slider. For example, if the host has a white shirt on, you need to increase this value slightly so that the keying effect will not be seen in their shirt. The White Clip parameter controls how close the keying will be toward white. White Clip: Likewise, white areas are also sometimes keyed out when they should not be. Adjust Black Clip (0 to 100) by using the slider. For example, if the host has black hair, you need to increase this value slightly so that the keying effect will not be seen in their hair. The Black Clip parameter controls how close the keying will be toward black. Adjust the key threshold (0 to 100) by using the slider.īlack Clip: Sometimes, dark areas are keyed out, when they should not be, due to how digital cameras function. The Key Threshold parameter enables Wirecast to determine how close the color in the video is to the key color. Key Threshold: Once you have the best key by picking the color, you can adjust the key threshold to drop out the background as completely as possible. Usually, clicking near the corners of the media provides the best key, but sometimes clicking near the main subject in the image is best. As you do this watch the preview change in the level of transparency, displaying the gray/white checkerboard pattern on the affected regions. Use the mouse to click a point on the image in the preview area. Check the Pick key color with mouse checkbox. Pick Key Color With Mouse: To get the best key possible, select the key color using the mouse. Wirecast’s Chroma Key Properties offer a color picker to select the exact color specification of your green screen, a Key Threshold, Black clip and White clip fine adjustments. Wirecast offers a live Chroma Key feature capable of removing green screen elements in your live streaming productions! With a well lit and composed green screen background, removing the background is as easy as enabling the Chroma Key feature in Wirecast. Don’t have the studio set up required to best represent yourself? Do you have access to a green screen? Ready to take your live streaming to the next level?
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