Open-source notices
VerseCut 3.0 · September 2026 · Stateam LLC
VerseCut's own code is © Stateam LLC. It is built on open-source software, and we thank the people who make it. This page lists every third-party component, how VerseCut uses it, and how to get its source.
The video engine (FFmpeg)
| Windows | macOS | |
|---|---|---|
| What ships | ffmpeg.exe, ffprobe.exe and their libraries, in setup\ffmpeg |
ffmpeg and ffprobe (Apple silicon and Intel), inside VerseCut.app |
| Build | BtbN FFmpeg-Builds ffmpeg-n9.0-latest-win64-lgpl-shared-9.0, FFmpeg version n9.0.2-3-ga5923073bf |
FFmpeg 9.0.2 with LAME 3.100, built by Stateam LLC with the script published beside the source |
| Licence | GNU LGPL version 3 (no GPL or non-free components) | GNU LGPL version 2.1 or later (no GPL or non-free components) |
| Not included | x264, x265, fdk-aac or any other GPL or non-free library | the same; network protocols are also switched off |
FFmpeg is included in the VerseCut download and runs as a separate program. It is not linked into VerseCut and it is not modified. You may replace it with your own build of the same libraries by putting your ffmpeg and ffprobe in VerseCut's runtime/ffmpeg folder.
Source code. The complete corresponding source for both builds is published with VerseCut:
- FFmpeg 9.0.2 release source (macOS build) and the FFmpeg source at commit
a5923073bf(Windows build), - LAME 3.100 source and the macOS build script,
- the BtbN build scripts at https://github.com/BtbN/FFmpeg-Builds, which name every library in the Windows build.
They are at https://downloads.versecut.net/source/index.html (linked from the VerseCut download page as Source code for open-source components). We will also send any of it on request, at no charge beyond the cost of media and postage, for at least three years after we last distributed this version: email bjohn@gostateam.com. FFmpeg is at https://ffmpeg.org. Full licence texts are in docs/licences inside VerseCut.
H.264 and AAC
VerseCut encodes H.264 video and AAC audio only with the encoders that are part of your operating system, which the operating system vendor licenses:
- Windows — Media Foundation (
h264_mf,aac_mf), or the Intel Quick Sync, NVIDIA NVENC or AMD encoders provided with your graphics driver. - macOS — Apple VideoToolbox (
h264_videotoolbox) and AudioToolbox (aac_at).
VerseCut does not include or use x264 or FFmpeg's own AAC encoder. MP3 export uses LAME.
Speech-to-text and other components
These are downloaded by the installer from the Python Package Index at the exact versions listed in setup/requirements.txt, and installed only inside VerseCut's private folder. faster-whisper is installed without its PyAV dependency, which VerseCut does not use.
| Component | Version | Licence | Used for |
|---|---|---|---|
| faster-whisper (SYSTRAN) | 1.2.1 | MIT | Offline speech-to-text |
OpenAI Whisper model small.en (converted by SYSTRAN) |
— | MIT | Speech model, downloaded at setup |
| CTranslate2 | 4.8.2 | MIT | Runs the speech model |
| ONNX Runtime | 1.19.2 | MIT | Voice-activity detection |
| tokenizers | 0.22.2 | Apache 2.0 | Speech model text |
| Hugging Face Hub, hf-xet | 1.8.0, 1.6.0 | Apache 2.0 | Downloads the model once |
| NumPy | 2.0.2 | BSD 3-clause | Audio arrays |
| Pillow | 12.3.0 | MIT-CMU (HPND) | Draws burned-in captions |
| certifi, tqdm | 2026.7.22, 4.70.1 | MPL 2.0 (tqdm: MPL 2.0 and MIT) | Unmodified; source at https://pypi.org |
| anyio, annotated-doc, coloredlogs, filelock, h11, httpx*, humanfriendly, markdown-it-py, mdurl, PyYAML, rich, typer | pinned | MIT (*httpx: BSD 3-clause) | Supporting libraries |
| flatbuffers, packaging, protobuf, fsspec, httpcore, idna, mpmath, Pygments, sympy, shellingham, typing_extensions | pinned | Apache 2.0, BSD, ISC or PSF | Supporting libraries |
| Python | 3.12 | PSF License | Runs VerseCut's engine (Windows: from python.org; macOS: python-build-standalone, inside VerseCut.app) |
| Source Sans 3 | 3.052 | SIL Open Font License 1.1 | Caption lettering (bundled) |
| Lora, Poppins, Source Sans 3, JetBrains Mono | — | SIL Open Font License 1.1 | Brand typography on the website |
The licence text of each Python package is in its folder inside VerseCut's private Python after setup.
Trademarks
VerseCut is a trademark of Stateam LLC. FFmpeg is a trademark of Fabrice Bellard. Other names are trademarks of their owners.