The local audio codec is the official single-thread @ffmpeg/core 0.12.10 build of FFmpeg 5.1.4, licensed under GNU GPL version 2 or later. These same-site downloads provide the corresponding sources, original build scripts, linked libraries and matching Emscripten runtime/system sources.
Sources preserve their upstream copyright and licence files. Audio editing stays on your device. These downloads contain software source code and do not contain user audio.
Read the build instructions · Download source preparation tools
| Component | Source download | Pinned commit |
|---|---|---|
| build | v12.15 source 1.27 MiB · MIT build scripts; linked core GPL-2.0-or-later | 71aa99d37c02 |
| emscripten | 3.1.40 source 19.81 MiB · MIT / University of Illinois-NCSA; bundled system components have their own notices | 5c27e79dd0a9 |
| ffmpeg | n5.1.4 source 13.76 MiB · GPL-2.0-or-later for this enabled-GPL build | 4729204c17f7 |
| freetype | VER-2-10-4 source 2.00 MiB · FreeType License or GPL-2.0-only | 6a2b3e4007e7 |
| fribidi | v1.0.9 source 1.99 MiB · LGPL-2.1-or-later | f9e8e71a6fbf |
| googletest | 703bd9caab50b139428cea1aaff9974ebee5742e source 0.86 MiB · BSD-3-Clause | 703bd9caab50 |
| harfbuzz | 5.2.0 source 15.51 MiB · MIT-style; individual file notices | 4a1d891c6317 |
| lame | master source 1.45 MiB · LGPL-2.0-or-later | 2badea1974ae |
| libass | 0.15.0 source 0.23 MiB · ISC | d149636f502f |
| libvpx | v1.13.1 source 5.26 MiB · BSD-3-Clause; patent license | 10b9492dcf05 |
| ogg | v1.3.4 source 0.24 MiB · BSD-3-Clause | bada45718453 |
| opus | v1.3.1 source 0.79 MiB · BSD-3-Clause; patent licenses | e85ed7726db5 |
| sdl2 | release-2.24.2 source 7.53 MiB · Zlib | 55b03c7493a7 |
| theora | v1.1.1 source 1.08 MiB · BSD-3-Clause | 7ffd8b2ecfc2 |
| vorbis | v1.3.3 source 1.26 MiB · BSD-3-Clause | 779816404319 |
| webp | v1.3.2 source 3.52 MiB · BSD-3-Clause; patent grant | ca332209cb55 |
| x264 | 4-cores source 0.90 MiB · GPL-2.0-or-later | 33cac6b77d5b |
| x265 | 3.4 source 1.46 MiB · GPL-2.0-or-later | 2bb5520e9596 |
| zimg | release-3.0.5 source 0.31 MiB · WTFPL-2.0 | e5b0de6bebbc |
| zlib | v1.2.11 source 0.62 MiB · Zlib | cacf7f1d4e3d |
Reda Apps Audio Tools v1.1.0 · Full source archive SHA-256 values and original official URLs are in the manifest. Keep these source files with this codec when deploying.