Module render 

Frame rendering coordinator — sequential, parallel, and streaming pipeline modes.

Render Modes

Mode	I/O	Parallelism	Best for
render_all_frames	PNG files on disk	Sequential	Debugging, inspection
render_parallel	PNG files on disk	Rayon (N cores)	Large renders with disk I/O
render_to_ffmpeg_pipe	FFmpeg stdin	Rayon + pipe	Fastest — zero PNG overhead

Pipeline comparison

Sequential PNG:   [frame 0] → PNG → [frame 1] → PNG → … → FFmpeg
Parallel PNG:     [frame 0]
                  [frame 1]  (all at once, Rayon)
                  [frame 2] → disk → FFmpeg

Pipe (fastest):   bounded Rayon batch → ordered RGBA frames → FFmpeg → MP4
                  Zero disk I/O, zero PNG compression overhead

Structs

NativeRenderConfig

Configuration for a native render job.

PipeConfig

Piped encoding configuration (no intermediate PNG files).

RenderCancellationToken

RenderControl

RenderProgress

Enums

StillImageFormat

VideoCodec

Video codec used by the FFmpeg pipe encoder.

Functions

build_pipe_ffmpeg_args

Build FFmpeg arguments for rawvideo stdin pipe and the selected codec.

render_all_frames

Render all frames sequentially to PNG files.

render_frame_timed

Render a single frame and return elapsed time (for benchmarking).

render_parallel

Render all frames in parallel using Rayon, then write PNGs.

render_still_fallible

Render one composition frame directly to PNG, JPEG, or WebP.

render_to_ffmpeg_pipe

Render frames in bounded parallel batches and stream raw RGBA to FFmpeg stdin.

render_to_ffmpeg_pipe_fallible

Fallible variant of render_to_ffmpeg_pipe.

save_frame

Save a single RgbaImage frame to disk.