Crate rff_format 

rff-format — the container (muxer/demuxer) abstraction layer (FFmpeg’s libavformat core, minus the formats themselves).

A container is the file wrapper (AVI, MP4, Matroska, …) that interleaves one or more elementary streams. This crate defines:

• Stream — the description of one elementary stream inside a container,
• Demuxer — reads a container, exposing streams and Packets,
• Muxer — writes streams + packets back into a container,
• FormatRegistry — what individual format crates register into.

Concrete formats live in their own crates (rff-format-avi, …).

Modules

aac

AAC configuration helpers shared by containers (MP4 esds, Matroska CodecPrivate, ADTS): the AudioSpecificConfig for AAC-LC.

av1

AV1 bitstream helpers shared by containers (MP4 av1C, Matroska CodecPrivate): locate the sequence-header OBU and build the AV1CodecConfigurationRecord around it.

avc

H.264 bitstream helpers shared by demuxers (FFmpeg’s h264_mp4toannexb bitstream filter plus a minimal SPS reader).

hvc

HEVC bitstream helpers for containers: the hvcC (HEVCDecoderConfigurationRecord, ISO/IEC 14496-15 §8.3.3) parser and builder, plus a minimal SPS reader.

Structs

Format

Static description of a container format and its read/write support.

FormatRegistry

Holds every container format known to a running engine.

MuxCaps

What a container’s muxer will accept: the machine-readable half of the rules each muxer already enforces when it writes a header.

Stream

Description of one elementary stream within a container.

Traits

Demuxer

Reads a container format: parses the header into Streams, then yields Packets until the input is exhausted.

Muxer

Writes a container format: declare streams, write packets, finalize.

Type Aliases

DemuxerFactory

Factory opening a demuxer over an input byte source.

Input

A byte source a demuxer reads from. (Box<dyn Read + Send> keeps the trait object-safe and lets inputs be files, network streams, or in-memory buffers.)

MuxerFactory

Factory opening a muxer over an output byte sink.

Output

A byte sink a muxer writes to.

PathMuxerFactory

Factory opening a muxer that owns its own file set (HLS/DASH write a playlist/manifest plus many segment files, so a single byte sink cannot model them). Receives the output path and the format options (-hls_time 6 → {"hls_time": "6"}).

ProbeFn

Content sniffer: scores how strongly a byte prefix looks like this format, 0 (no match) to 100 (certain) — mirrors FFmpeg’s AVInputFormat::read_probe.