Struct WebpEncodeSettings 

pub struct WebpEncodeSettings {
    pub quality: u8,
    pub max_fps: u32,
    pub max_width: Option<u32>,
    pub lossless: bool,
    pub compression_level: u8,
}

Encoder settings for the animated WebP cover derived from a clip’s MP4 preview.

The animated WebP is embedded as the audio file’s front-cover picture. A FLAC PICTURE block is length-prefixed with a 24-bit field, so a single picture cannot exceed ~16 MiB; a real 5 s Suno cover at quality 95 with no width cap is ~31 MiB and would never fit. The Default is therefore a bounded lossy profile that reliably fits that ceiling: quality 90 at effort (compression_level) 4, scaled to at most 640 px wide (owner measurement: ~11 MiB, ~30% headroom under the cap; 800 px is ~14.5 MiB with far thinner margin). Effort is capped at 4 because effort 6 only matches its size for 7-13x the encode time. Lossless is opt-in and far larger (a 5 s cover is ~145 MB), so it fits only the larger MP3/ALAC containers, never FLAC.

Fields

quality: u8

Lossy encoder quality, 0-100 (higher is better and larger). Ignored when lossless is set.

max_fps: u32

Cap on the output frame rate; a faster source is downsampled to this.

max_width: Option<u32>

Optional cap on the output width in pixels: Some(w) scales a wider source down keeping its aspect ratio (never upscaling), while None keeps the source resolution.

lossless: bool

Encode losslessly. Off by default: lossless animated WebP of real video is intrinsically huge (roughly 30x the lossy source) with no visible gain over quality 95 for a cover.

compression_level: u8

Encoder effort, 0-4 (higher is smaller and slower). Capped at 4 because effort 6 yields the same size for many times the encode time.

Trait Implementations

impl Clone for WebpEncodeSettings

fn clone(&self) -> WebpEncodeSettings

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WebpEncodeSettings

impl Debug for WebpEncodeSettings

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

Formats the value using the given formatter.

impl Default for WebpEncodeSettings

fn default() -> Self

Returns the “default value” for a type.

impl Eq for WebpEncodeSettings

impl PartialEq for WebpEncodeSettings

fn eq(&self, other: &WebpEncodeSettings) -> 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 WebpEncodeSettings