Struct ExportFrameGenerator 

pub struct ExportFrameGenerator {
    project: EditProject,
    stream: EditorVideoStream,
    preview: EditorPreview,
    next: u64,
    total: u64,
}

Walks an [EditProject] into a deterministic composed-frame stream.

Fields

project: EditProject

stream: EditorVideoStream

preview: EditorPreview

next: u64

total: u64

Implementations

impl ExportFrameGenerator

pub fn new(project: EditProject, source: &Path) -> Result<Self, String>

Open the source clip + compose pipeline for project, composing at the project’s aspect-ratio canvas ([EditProject::canvas_dims], AUT-513).

Errors

Returns a message if the source can’t be opened or the wgpu compose pipeline can’t be created.

pub fn with_canvas( project: EditProject, source: &Path, canvas_w: u32, canvas_h: u32, ) -> Result<Self, String>

Like Self::new but composes into an explicit canvas_w × canvas_h output — the export path passes the aspect canvas after clamping it to the HW-encoder edge cap (fit_within_encoder_limits) so the generator and the encoder agree on dimensions. The source is aspect-fit (letterbox / pillarbox) into the canvas.

Errors

Returns a message if the source can’t be opened or the wgpu compose pipeline can’t be created.

pub fn frame_count(&self) -> u64

Total project frames the generator will emit.

pub fn spawn_count(&self) -> u64

Decode pipelines spawned so far — stays 1 for a full forward walk.

pub fn next_frame(&mut self) -> Option<ExportFrame>

Generate the next project frame, or None at the end of the project.