Legal

Open Source Notices

Third-party software notices and license references. Last updated 2026-05-08.

Creative Asset Notes

Generated marketing assets are not listed as open-source software dependencies, but their source is recorded here for production reference.

faster-whisper

Default local speech-to-text transcription backend

MIT

Notice / License Reference

faster-whisper is the default local ASR backend for this app.
It runs Whisper-compatible models through CTranslate2 and depends on several
runtime libraries such as CTranslate2, Hugging Face Hub, Tokenizers,
ONNX Runtime, PyAV, and tqdm. Preserve notices for faster-whisper and its
runtime dependencies, and review PyAV/FFmpeg binary linkage separately.

CTranslate2

Inference engine used by faster-whisper

MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

Hugging Face Hub / Tokenizers

Model download and tokenization runtime used by faster-whisper

Apache-2.0

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

ONNX Runtime

Runtime dependency used by faster-whisper

MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

PyAV

FFmpeg library bindings used by faster-whisper media decoding

BSD-style; FFmpeg libraries separately

Notice / License Reference

PyAV is a Python binding layer around FFmpeg libraries. Preserve PyAV notices and review the linked FFmpeg libraries/build flags separately.

tqdm

Progress helper dependency used by faster-whisper

MPL-2.0 and MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

OpenAI Whisper

Speech-to-text transcription fallback backend

MIT

Notice / License Reference

MIT License

Copyright (c) 2022 OpenAI

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.

PyTorch

Model runtime for OpenAI Whisper fallback inference

BSD-3-Clause

Notice / License Reference

BSD-3-Clause style licenses generally allow commercial use,
modification, and redistribution. The main obligations are:
- keep the copyright notice
- keep the license/disclaimer text
- do not use contributor names to endorse derived products without permission

NumPy

Numerical array operations in the ML/audio stack

BSD-style

Notice / License Reference

NumPy is distributed under a BSD-style license and is commonly
used in commercial software. Some binary distributions bundle additional
runtime libraries with their own notices. If you distribute binaries, keep
those bundled notices available. For hosted SaaS use, this is usually a
notice/attribution issue, not a blocker to selling the product.

Numba

JIT acceleration used by the local transcription stack

BSD

Notice / License Reference

BSD-3-Clause style licenses generally allow commercial use,
modification, and redistribution. The main obligations are:
- keep the copyright notice
- keep the license/disclaimer text
- do not use contributor names to endorse derived products without permission

FFmpeg

Audio extraction, waveform generation, preview rendering, exports

LGPL / GPL depending on build flags

Notice / License Reference

FFmpeg is generally available under LGPL-2.1-or-later.
If FFmpeg is built with --enable-gpl (or linked with GPL-only components),
that FFmpeg build is GPL-2.0-or-later instead.
See: https://ffmpeg.org/legal.html

SubtitlesOctopus / libass WebAssembly

Browser ASS subtitle preview rendering

LGPL-2.1 and bundled permissive notices

Notice / License Reference

The bundled browser ASS preview renderer includes
SubtitlesOctopus/libass WebAssembly assets and embedded notices for LGPL-2.1,
BSD-2-Clause, ISC, MIT-style, and related permissive components. Preserve the
bundled notice text and verify the exact packaged build before making final
redistribution or compliance statements.

FastAPI

Python web application framework

MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

Uvicorn

ASGI server for the FastAPI app

BSD-3-Clause

Notice / License Reference

BSD-3-Clause style licenses generally allow commercial use,
modification, and redistribution. The main obligations are:
- keep the copyright notice
- keep the license/disclaimer text
- do not use contributor names to endorse derived products without permission

Jinja2

Server-rendered HTML templates

BSD-3-Clause

Notice / License Reference

BSD-3-Clause style licenses generally allow commercial use,
modification, and redistribution. The main obligations are:
- keep the copyright notice
- keep the license/disclaimer text
- do not use contributor names to endorse derived products without permission

Pillow

Image processing helpers for media and font workflows

HPND

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

fontTools

Font metadata inspection and static font instance generation

MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

Redis Python Client

Redis queue connectivity

MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

RQ

Redis-backed background job queue

BSD

Notice / License Reference

BSD-3-Clause style licenses generally allow commercial use,
modification, and redistribution. The main obligations are:
- keep the copyright notice
- keep the license/disclaimer text
- do not use contributor names to endorse derived products without permission

argon2-cffi

Password hash verification and migration

MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

Sentry SDK

Optional backend error monitoring

MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.

Tailwind CSS / PostCSS / Autoprefixer

CSS build tooling

MIT

Notice / License Reference

This component is distributed under a permissive open-source
license. The practical obligation is to preserve the copyright notice,
license text, and disclaimer where required by that license.