Chromakey + bullet-time photography (demo / tutorial)
Xangle Camera Server is the software we use for our bullet-time creations. We're currently running this 12-cameras (Canon T7/2000d) and also a full 360 degree / 176 Canon SL1 using it. Over a hundred event agencies and production companies are using it currently.
Other examples
This video is about one specific feature that I rarely used but that is a major key point for many of my clients: Chroma-key / Green screen replacement See the following demos :
Video transcript
We knew that this green backdrop was too small, but we wanted to take the occasion to test the new crop feature in the chroma key module.
For this demo, we’re going to use twelve Canon T7.
Ok let’s start from the beginning. To do this, you’ll need to install your backdrop and light it as evenly as you can. We didn’t do a good job on this one, but that should work correctly. Once the background and the lights are installed, go in the “Chromakey” module, and click on the button to take a reference shot. From there, on the reference image, click on a green area that is close to your subject. You’ll see the result in realtime on the picture on the right. Use the threshold sliders to increase or decrease the tolerance for the selected colour to be removed from the image.
To fix the problem with the narrow backdrop, click on “crop” and adjust accordingly. Please note that everything that is outside of the box is going to be considered as green, thus, you’ll have to keep your subject within these boundaries. On the other hand, you could use this crop for some creative ideas. In the same vein, you can scale down your subject using the “scale” button. This is interesting for larger virtual scenes when you’re shooting in a very constraint area.
By using multiple collections of assets, you can let your user select its own set of graphics. To do so, activate “allow user to change collection” from the Assets panel, and then select the collections you want to make available. You’ll need to upload a proper thumbnail for each of the collections. Each collection can have its own series of background,... foreground… and color grading. To test your graphics, press ctrl-alt-k from the player to apply your modifications to an existing video.
Usually, you create your background images to match with your number of cameras. However, you can also double or triple the number of images and then take multiple shots that are all going to be combined in a single video file. In this example, we’re taking 3 shots using twelve cameras, using a set of 36 background and foreground images.