Trait FrameSource 

pub trait FrameSource: Send {
    // Required methods
    fn params(&self) -> &CodecParameters;
    fn next_frame(&mut self) -> Result<Frame>;

    // Provided methods
    fn metadata(&self) -> &[(String, String)] { ... }
    fn duration_micros(&self) -> Option<i64> { ... }
}

A producer of already-decoded Frames.

Used by synthetic generators (testsrc, sine sweep, gradient image, …) that emit decoded frames natively. The pipeline executor consumes frames directly, skipping both the container-demux and decode stages.

Required Methods

fn params(&self) -> &CodecParameters

Codec parameters describing the frames this source emits. Stable across the lifetime of the source. Even though the frames are already decoded, downstream filters and encoders need the parameter shape (sample rate / pixel format / channel layout / frame rate / …) to configure themselves.

fn next_frame(&mut self) -> Result<Frame>

Produce the next frame. Returns Error::Eof at end of stream.

Provided Methods

fn metadata(&self) -> &[(String, String)]

Source-level metadata as ordered (key, value) pairs. Default is empty.

fn duration_micros(&self) -> Option<i64>

Source-level duration in microseconds, if known. Default is None.

Implementors