Function stripes_hold_quantizer 

pub fn stripes_hold_quantizer(settings: &CaptureSettings) -> bool

Whether the software H.264 session holds its cleanup at the quantizer asked for: libx264 does under either rate control, and OpenH264 moves its quantizer only at a constant quality (Openh264Encoder::update_qp), so a session that holds none is cleaned up through its rate control (encode_cpu), never by a key frame, which that would starve.