FFmpeg Asm | Agent Skills Atlas

About this skill

ffmpeg upstream contributions (hand-written assembly in libavcodec/libavfilter/libswscale) and custom ffmpeg integration (building, embedding, calling libav APIs). Covers x8664 (SSE/AVX/AVX2/AVX-512) and AArch64 (NEON/SVE/SVE2) idioms specific to ffmpeg's x86inc.asm and aarch64/asm.S macro frameworks, the checkasm and FATE test harnesses, and the ffmpeg upstream patch workflow. TRIGGER when: editing .asm files under libav/x86/, .S files under libav/aarch64/ or libav/arm/, working with x86inc.asm, x86util.asm, or aarch64/asm.S macros, writing init.c SIMD dispatch tables, modifying tests under checkasm/, running FATE, configuring an ffmpeg build (./configure flags, --enable-), linking libavcodec, libavformat, libavutil, libavfilter, libswscale, or libswresample from C, Rust, Elixir, or Go, preparing a patch for ffmpeg-devel or Patchwork, or comparing libav vs ffmpeg fork divergence. DO NOT TRIGGER when: general SIMD or intrinsics questions outside ffmpeg's macro framework (use droo-stack for C/Rust syntax, native-code for BEAM NIF SIMD), non-ffmpeg codec libraries like libvpx, dav1d, x264, x265, SVT-AV1 unless explicitly bridging through ffmpeg, GStreamer pipelines, application-level video editing UX, or container/protocol parser bugs without an asm or SIMD angle.

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Original listing metadata

Original name

ffmpeg-asm

Original description

ffmpeg upstream contributions (hand-written assembly in libavcodec/libavfilter/libswscale) and custom ffmpeg integration (building, embedding, calling libav* APIs). Covers x86_64 (SSE/AVX/AVX2/AVX-512) and AArch64 (NEON/SVE/SVE2) idioms specific to ffmpeg's x86inc.asm and aarch64/asm.S macro frameworks, the checkasm and FATE test harnesses, and the ffmpeg upstream patch workflow. TRIGGER when: editing .asm files under libav*/x86/, .S files under libav*/aarch64/ or libav*/arm/, working with x86inc.asm, x86util.asm, or aarch64/asm.S macros, writing *_init.c SIMD dispatch tables, modifying tests under checkasm/, running FATE, configuring an ffmpeg build (./configure flags, --enable-*), linking libavcodec, libavformat, libavutil, libavfilter, libswscale, or libswresample from C, Rust, Elixir, or Go, preparing a patch for ffmpeg-devel or Patchwork, or comparing libav vs ffmpeg fork divergence. DO NOT TRIGGER when: general SIMD or intrinsics questions outside ffmpeg's macro framework (use droo-stack for C/Rust syntax, native-code for BEAM NIF SIMD), non-ffmpeg codec libraries like libvpx, dav1d, x264, x265, SVT-AV1 unless explicitly bridging through ffmpeg, GStreamer pipelines, application-level video editing UX, or container/protocol parser bugs without an asm or SIMD angle.

About this listing

Category: General
Reported license: MIT
Listing language (estimated): English
Review status: Not individually reviewed
Agent compatibility: Atlas installation supports Claude Code, Codex, and Cursor. Skill-specific dependencies and features are checked during setup.