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Open Source Licenses

Trencada’s audio and video tools run entirely in your browser. To do that, they use the following open-source projects. This page gives the attribution and license information those projects require.

Your files are processed locally in your browser. These libraries run on your device — your files are not uploaded to our servers for conversion.

FFmpeg.wasm wrapper (MIT License)

Our tools perform audio/video conversion through the FFmpeg.wasm wrapper libraries:

@ffmpeg/ffmpeg and @ffmpeg/util — MIT License, copyright Jerome Wu and the ffmpeg.wasm contributors.

MIT License

Copyright (c) Jerome Wu

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

FFmpeg conversion core (GNU General Public License v2 or later)

Audio/video conversion runs FFmpeg 5.1.4 in your browser via the @ffmpeg/core package (version 0.12.10), which is licensed under the GNU General Public License version 2 or later: https://www.gnu.org/licenses/gpl-2.0.html

The core build includes these components: x264 (GPL-2.0-or-later, H.264 encoder), x265 (GPL-2.0-or-later, H.265 encoder), libmp3lame (LGPL, MP3 encoder), libvpx (BSD, VP8/VP9), libopus (BSD-3-Clause), libvorbis and libtheora (BSD), libwebp (BSD), zlib (zlib license), freetype2 (FreeType License), fribidi (LGPL), harfbuzz (MIT), libass (ISC), and zimg (WTFPL v2).

Source code offer

In accordance with the GNU General Public License, we offer the complete corresponding source code for the @ffmpeg/core 0.12.10 build used on this site. This offer is valid for three years from the date you downloaded the software and applies to anyone in possession of the object code.

The build is unmodified upstream output. Its source is fully described by:

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