Function hardware_lacks_ten_bit 

fn hardware_lacks_ten_bit(
    served: &HardwareEncoders,
    settings: &CaptureSettings,
) -> bool

Whether a 10-bit request is the software encoder’s to serve: the node’s engine encodes the codec without 10 bits at the chroma it would run, and the build’s software encoder codes them, so the session takes the software path as a 4:4:4 the engine lacks does rather than streaming 8 bits on hardware.