const KEY_PRESET: i8 = 9;Expand description
The preset a constant-rate session opens at and codes a still screen’s held key frame at: the
slowest at which the real-time mode keeps a frame’s references to two, which the anchors the
session stores (MANAGED_REFS) need; the library refuses them below it. The real-time mode
turns the screen-content tools (palette, intra block copy) off from this preset on. The
session’s first key frame and every other frame keep their own presets: the library takes a
picture’s preset change within the open one’s and faster.