Function engine_may_serve 

pub(crate) fn engine_may_serve(settings: &CaptureSettings) -> bool

Whether an engine may take the codec settings names at another size: software is not forced, and the encode node’s probe found an engine for it, at the depth asked, or found every session taken. A session the ladder left in software where this holds was refused for something a resize can change (an engine’s maximum size), so it runs the ladder again.