Enum SeekMode 

#[repr(u8)]
pub enum SeekMode {
    Keyframe = 0,
    Exact = 1,
    Backward = 2,
}

Seek mode for positioning the decoder.

This enum determines how seeking is performed when navigating through a media file.

Performance Considerations

• Keyframe is fastest but may land slightly before or after the target
• Exact is slower but guarantees landing on the exact frame
• Backward is useful for editing workflows where the previous keyframe is needed

Examples

use ff_decode::SeekMode;

// Default is Keyframe mode
let mode = SeekMode::default();
assert_eq!(mode, SeekMode::Keyframe);

// Use exact mode for frame-accurate positioning
let exact = SeekMode::Exact;
assert_eq!(format!("{:?}", exact), "Exact");

Variants

Keyframe = 0

Seek to nearest keyframe (fast, may have small offset).

This mode seeks to the closest keyframe to the target position. It’s the fastest option but the actual position may differ from the requested position by up to the GOP (Group of Pictures) size.

Exact = 1

Seek to exact frame (slower but precise).

This mode first seeks to the previous keyframe, then decodes frames until reaching the exact target position. This guarantees frame-accurate positioning but is slower, especially for long GOPs.

Backward = 2

Seek to keyframe at or before the target position.

Similar to Keyframe, but guarantees the resulting position is at or before the target. Useful for editing workflows where you need to start decoding before a specific point.

Trait Implementations

impl Clone for SeekMode

fn clone(&self) -> SeekMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SeekMode

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

Formats the value using the given formatter.

impl Default for SeekMode

fn default() -> SeekMode

Returns the “default value” for a type.

impl PartialEq for SeekMode

fn eq(&self, other: &SeekMode) -> 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 Copy for SeekMode

impl Eq for SeekMode

impl StructuralPartialEq for SeekMode