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Posted by Nick Thissen
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In terms of performance do you mean performance or framerate of the NDI output?
The difference is this: in the old NDI v1, we use software rendering on the CPU to render each frame into NDI. The speed at which this happens is directly related to how many (visible) pixels must be rendered. A small widget is totally fine, but something close to a full screen widget is going to seriously hinder performance (usually down to 10-20 fps in my testing).
In the new NDI Recorder this is no longer the case; we use a different way to capture the overlay (on the GPU) which is no longer related to how many pixels need to be recorded. So this way should always easily reach 60 fps, while NDI v1 can often drop down to way below that.