Module engine 

The compression engine contract and shared types.

Key architectural decision: core is designed around the Engine interface even while there is exactly one engine (media/ffmpeg). This lets us plug in images/PDF/office later without rewriting the skeleton.

Principle: Engine::plan is a pure, testable function (bitrate math); side effects are isolated in Engine::run.

Modules

media

Media engine v0.1: video + audio via ffmpeg (external process).

Structs

AudioSpec

Audio encoding parameters (absent means drop the track).

EncodePlan

The encode plan — the result of Engine::plan. Usable for --dry-run.

EncodeSpec

The full encode recipe.

MediaInfo

Source file metadata — the result of Engine::probe.

Outcome

The execution result — the result of Engine::run.

ShrinkOpts

Compression options passed to the engine — the decoded form of the flags.

VideoSpec

Video encoding parameters.

Enums

EngineError

Engine errors.

SizeGoal

What the user wants in terms of size.

Traits

Engine

The compression engine contract. The one v0.1 implementation is media::MediaEngine.