Correct four details that had drifted from the code Read against the source rather than against memory: Deinterlacing named AM_INTERLACE_FIELD_PATTERN_FIELD1FIRST. The flag the code tests in the VIDEOINFOHEADER2 is AMINTERLACE_Field1First. The settings window named AdjustWindowRectEx. The call is AdjustWindowRect. Signal detection gave kSignalSnowDelta as 48 in three places. It is 65, and it was raised for a reason worth writing down, so the reason is there now too. Latency quoted an idle floor of a flat 200 ms. IdleFloorMs() has since become two numbers: 16 ms while something on screen animates itself, 200 ms otherwise. The measured 4.7 fps of a fully idle window is in the text.
What the grey ring actually was, and the field that went missing
How the signal detector tells snow from a scene cut