Your best choice of input-type for programmatically-generated content is the XAML input. vMix will auto-run the first Storyboard contained in your UserControl. At that point, you can use pixel shaders running on the GPU, or control content via a Property Page.

There is no callable API, although there is an Interface that you can inplement in your code to show your Property Page.

Jon

Thanks for your answer.

I'm not familiar with XAML; how dynamic is it? If I change something (like a picture) on the server side, how can I trigger the change on-screen?

My goal is to have something like the "media folder" source (which imports a list of images then the user can select "next image") - but dynamic.

I'm not sure what you mean by "server side", so I'll give you a general answer.

You create a View Model for your data elements (properties, or whatever you want to display). You derive these data elements from something in Windows called a "Dependency Property" (fancy term for properties that can be animated). You create your "Visual" (whatever you want to appear as your vMix "input") in a language called XAML, then bind the "visual things that change" to the dependency properties in your View Model.

With the binding in place, anytime your data changes, the change gets sent to the visual element it's bound to. Presto, it appears on screen.

You can also bind "animations" to your visual elements, so you can automatically apply visual effects like Wipe, Slide, or Fade whenever data changes (think Windows 8 Live Tiles). These visual effects can be very fancy, because XAML supports the use of Pixel Shaders running on the GPU of your graphics card. So if you want to apply blurs, transformations, or distortions to your visual elements, it's a very straightforward procedure.

vMix doesn't have an API (yet), so it's not possible to use other vMix inputs in your code. Aside from that limitation, this is the best way to implement dynamic ticker tapes, scoreboard bugs, lower-third song lyrics, or anything where you have a dataset that you dynamically want to incorporate into a visual image.

dou you want the overlay to be moving (really like a ticker) or do you just want to overlay an image

in the latter case you can download the image from your webserver somewhere locally and trigger a media addition with the api (it should be there somewhere).

M@ik

vMix doesn't have a callable API (yet), but you "trigger a refresh" using a XAML input. Please see my previous post.

If the image is local, you bind the image to a XAML Image object.

Jon