webcodecs-ffmpeg

Refactor Dockerfiles following official Docker best practices without breaking builds. Use when asked to optimize, improve, refactor, or review Dockerfiles. Covers multi-stage builds, layer caching, security hardening, and instruction-specific patterns.

Configure and compile FFmpeg from source for any platform and architecture. Handles cross-compilation (Linux→Windows, x86_64→ARM), license compliance (LGPL/GPL/nonfree), codec dependencies, and Docker-based builds. Use when building FFmpeg binaries, creating CI/CD pipelines for FFmpeg compilation, debugging configure failures, or selecting codecs and features for custom builds.