$ show zmwangx/rust-ffmpeg
This repository provides safe Rust bindings to FFmpeg multimedia libraries (avcodec, avformat, avfilter, avutil, swscale, swresample). It functions as a multimedia processing library enabling audio/video decoding, encoding, filtering, muxing/demuxing, and device handling through idiomatic Rust abstractions over FFmpeg's C API. The architecture follows FFmpeg's subsystem organization with modules for codecs, formats, filters, software scaling/resampling, and utilities. Key entry points include ffmpeg::init() for initialization, format::context for I/O handling, codec::context for encoder/decoder setup, and filter::graph for filter chains. Data flows typically involve opening input contexts, decoding packets to frames, optional processing (filtering/scaling), encoding frames, and writing output contexts. The crate maintains compatibility with FFmpeg versions 3.4-9.0 via feature-gated version tracking.
The LLM identified 3 files worth highlighting for reuse:
Provides a safe, ergonomic abstraction over FFmpeg's AVDictionary with owned/mutable/immutable variants. Prevents resource leaks and misuse of the C dictionary API through RAII and type-safe access patterns. Demonstrates skilled FFI wrapping by managing complex ownership semantics while exposing a clean Rust interface.
Defines Ref and Mut traits for safe borrowing of FFmpeg packet data, enabling zero-copy access to packet buffers without deep copies. Implements proper lifetime management through PhantomData and Drop guards. Represents a reusable pattern for handling reference-counted resources in FFI bindings that could be adapted to other C libraries with similar reference counting.
Implements type-safe access to video frame data with support for various pixel formats through generic pixel trait bounds. Ensures correct interpretation of raw pixel data and prevents format mismatches at compile time. Shows advanced multimedia handling by encapsulating FFmpeg's AVFrame complexity while providing efficient, safe access to image planes and metadata.