Skip to content

THIRD-PARTY-NOTICES.md

Latest commit

 

History

History
159 lines (138 loc) · 8.77 KB

THIRD-PARTY-NOTICES.md

File metadata and controls

159 lines (138 loc) · 8.77 KB
Raw

Third-party notices

OpenScreen is MIT licensed (see LICENSE). The installers additionally bundle the pre-built native components below. This file ships inside the application resources and satisfies the attribution and source-offer obligations that come with them.

npm dependencies are not listed here: they are resolved from package.json and distributed by their own registries, not redistributed inside our binaries.

FFmpeg — shared libraries (Windows only)

  • Components: avcodec-*.dll, avformat-*.dll, avutil-*.dll, swresample-*.dll, swscale-*.dll and their siblings, under resources/electron/native/bin/win32-*/.
  • Used by: the native D3D11 compositor addon, which links against them at load time.
  • License: GNU Lesser General Public License v2.1 or later (https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html). FFmpeg's own licensing page: https://ffmpeg.org/legal.html.
  • This is an LGPL build, not a GPL one. It is configured without --enable-gpl and without --enable-nonfree, and links no GPL-only library (x264, x265, xvid, vidstab, rubberband, frei0r, …). scripts/fetch-ffmpeg.mjs verifies this before vendoring — it reads ffmpeg -L, -buildconf and -encoders and refuses any binary that reports otherwise.
  • Upstream binaries: BtbN/FFmpeg-Builds, release autobuild-2026-07-31-14-10, the *-lgpl-shared-8.1 assets. Pinned by SHA-256 in scripts/fetch-ffmpeg.mjs; the digests there identify the exact artifacts we ship. https://github.com/BtbN/FFmpeg-Builds/releases/tag/autobuild-2026-07-31-14-10
  • Corresponding source: FFmpeg n8.1.2, commit 9b6c8969e0, from https://github.com/FFmpeg/FFmpeg. The build configuration and scripts that produced these exact binaries are published at https://github.com/BtbN/FFmpeg-Builds.
  • Relinking: as required by the LGPL, these are dynamic libraries. You may replace them with your own build of the same FFmpeg version by overwriting the DLLs in resources/electron/native/bin/win32-*/.

whisper.cpp and ggml

  • Components: whisper-stt-server and its ggml backend sidecars, under resources/electron/native/bin/<platform>-<arch>/.
  • License: MIT — https://github.com/ggml-org/whisper.cpp and https://github.com/ggml-org/ggml.
  • Built from source by scripts/build-whisper-stt.sh; the pinned upstream revision is in electron/native/whisper-stt/CMakeLists.txt.
  • The speech model (ggml-*.bin) is not bundled — it is downloaded into the user's data directory on first use by electron/stt/modelManager.ts.

ONNX Runtime (Windows and Apple Silicon macOS)

  • Component: onnxruntime.dll / libonnxruntime.dylib, under resources/electron/native/bin/<platform>-<arch>/.
  • License: MIT — https://github.com/microsoft/onnxruntime.
  • Not built here: the pinned upstream release archive is downloaded, SHA-256 verified and unpacked by scripts/fetch-onnxruntime.mjs, which also checks the archive's own LICENSE really is MIT before vendoring anything.
  • Why it ships: the native compositor segments the webcam subject with it, on the CPU execution provider, to drive the camera background cutout/blur/custom modes. The gpu_cuda* builds are deliberately not used — they are an order of magnitude larger and carry NVIDIA redistribution terms.
  • Not on Intel macOS: upstream publishes no osx-x86_64 asset from 1.27 on, so the x64 DMG ships without it and the camera background effects are simply absent there. Not shipped on Linux either, where the compositor has no capture path for the mask yet.
  • The segmentation model it runs is a separate component, immediately below.

MediaPipe Selfie Segmentation — model weights

  • Components: selfie_segmentation.tflite, selfie_segmentation_landscape.tflite and the selfie_segmentation_landscape.onnx derived from them, shipped under resources/mediapipe/.
  • License: Apache-2.0 — https://google.github.io/mediapipe/solutions/selfie_segmentation. Copyright The MediaPipe Authors.
  • The .onnx is a derived work, generated from the vendored .tflite by scripts/convert-selfie-segmentation-to-onnx.py. No third-party weights are downloaded at build time.
  • Why it is listed here: these weights are redistributed inside the installer, and Apache-2.0 §4 asks that the attribution travel with them. The provenance note in public/mediapipe/selfie_segmentation/README.md does not — electron-builder's "!*.md" filter strips it from the package — so this file is the only copy a user ever receives.
  • The MediaPipe JavaScript solution and its two ~5.6 MB WASM builds are no longer bundled: inference moved into the native compositor, and nothing loaded them.

Microsoft Visual C++ runtime — vcomp140.dll, msvcp140*.dll, vcruntime140*.dll (Windows only)

  • Components: under resources/electron/native/bin/win32-x64/ — vcomp140.dll, msvcp140.dll, msvcp140_1.dll, vcruntime140.dll, vcruntime140_1.dll.
  • License: redistributable under the Microsoft Visual C++ Redistributable terms accompanying Visual Studio; the copies shipped are taken from the VC\Redist\MSVC\<version>\x64\Microsoft.VC<nnn>.OpenMP\ and …\Microsoft.VC<nnn>.CRT\ directories of the Visual Studio installation that builds the release, never from System32.
  • Why they ship: two prebuilt binaries in the payload import them, and neither is ours to recompile against the static CRT. The ggml backends above are compiled with OpenMP and import vcomp140.dll; the vendored ONNX Runtime imports the CRT proper. None of these are part of Windows, so without them whisper-stt-server dies in the loader before main() on any machine that has no Visual C++ Redistributable — transcription and captions fail with no usable error — and onnxruntime.dll fails to load, leaving the camera background silently inert. Staged by scripts/stage-vcomp-runtime.mjs; scripts/before-pack.cjs refuses to package if any is missing while something still imports it.

PipeWire — headers (Linux only)

  • Components: header sources under electron/native/pipewire-capture/vendor/pipewire-1.0.5/include/, compiled into openscreen-pipewire-helper (the Linux cursor/capture helper) under resources/electron/native/bin/linux-*/.
  • License: MIT — https://gitlab.freedesktop.org/pipewire/pipewire. Every vendored file keeps its upstream SPDX-License-Identifier: MIT header, and the project's licence text is copied alongside them as COPYING.
  • Upstream: PipeWire release 1.0.5. Only the header subset the helper includes was vendored; vendor/README.md records exactly what was copied and how to reproduce the selection.
  • No PipeWire binary is redistributed. The helper resolves libpipewire-0.3.so.0 with dlopen at runtime, from the user's own system, so nothing of PipeWire's ships inside our installers beyond the compiled result of its headers (inline functions and struct layouts).

Fonts — Inter, Lora, Oswald, Caveat, IBM Plex Mono

  • Components: the Regular and Bold .ttf of each family, under resources/fonts/.
  • Used by: the native compositor, which draws captions and annotations with these files and nothing else (it registers them privately at start and never reads the fonts installed on the machine), and the editor's font picker.
  • License: SIL Open Font License 1.1 — https://openfontlicense.org. Each family's copyright notice and licence text ship beside its files as <Family>-OFL.txt, as the licence requires.
  • Unmodified: every file is redistributed exactly as upstream publishes it, which is also why the Reserved Font Names "Lora" and "Plex" are kept.
  • Upstream:

OpenScreen native helpers

wgc-capture (Windows Graphics Capture), the ScreenCaptureKit helper (macOS), the PipeWire helper (Linux) and the compositor addon are part of this repository and are covered by LICENSE.

To report an omission or request source for anything bundled here, open an issue at https://github.com/getopenscreen/openscreen/issues.