Enum Preset 

pub enum Preset {
    Fast,
    Quality,
}

Speed/quality trade-off, in the spirit of x264’s -preset. The bitstream is valid (and decodes bit-exactly) either way; only the encoder’s effort differs.

Variants

Fast

Fast (default) — built to mirror x264’s fastest presets: mode decision by cheap SAD estimation (no rate-distortion trial-encoding; SAD auto-vectorizes to psadbw), P_16x16-only inter, I_16x16-only intra, and integer-pel motion (no sub-pel mc_luma interpolation — profiling showed it was ~55% of the encode). Much faster; larger files, and a little quality lost on sub-pixel motion (none on integer/screen content).

Quality

Quality — full rate-distortion mode decision (every candidate trial-encoded for real J = SSD + λ·bits), 16x8/8x16 sub-partitions, and the full I_4x4 intra search. Smaller files; much slower.

Trait Implementations

impl Clone for Preset

fn clone(&self) -> Preset

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Preset

impl Debug for Preset

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Preset

fn default() -> Preset

Returns the “default value” for a type.

impl Eq for Preset

impl PartialEq for Preset

fn eq(&self, other: &Preset) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Preset