Module mux 

Sans-IO WebM/Matroska muxer: add_track → begin → push_frame → poll_bytes.

Scope and design: see adr/0003-webm-mux.md. Mirrors iso_bmff::mux’s typestate shape (Open → Live) and output/poll_bytes drain pattern.

Structs

Live

Streaming phase — push_frame/poll_bytes API.

Muxer

Sans-IO WebM muxer. S is the typestate (Open or Live).

Open

Track registration phase — call Muxer::begin before pushing frames.

Constants

DEFAULT_CLUSTER_BATCH

Default frames buffered per Cluster before it is flushed to output.