Credits and licences
SyncProof is built on open-source components. Thank you to their authors. Each is used under the licence shown below. The same notices ship with the app.
| Component | Copyright | Licence |
|---|---|---|
YuNet face detector, face_detection_yunet_2023mar (OpenCV Model Zoo) | © 2020 Shiqi Yu | MIT |
| MediaPipe Face Mesh v1 landmark model | © Google LLC | Apache 2.0 |
| FFmpeg | © the FFmpeg developers | LGPL v3 or later |
| ONNX Runtime | © Microsoft Corporation | MIT |
| NumPy | © NumPy Developers | BSD 3-Clause |
| Pillow | © Jeffrey A. Clark and contributors; © Secret Labs AB; © Fredrik Lundh | MIT-CMU |
| Python | © Python Software Foundation | PSF License |
YuNet
Finds faces in each frame, including small faces in wide shots. From the OpenCV Model Zoo. Used unchanged.
MediaPipe Face Mesh
Places 468 landmarks on each face; SyncProof uses the lip and eye-corner points to follow mouth opening. From MediaPipe, licensed under the Apache License, Version 2.0. Change notice: the model file was converted from TensorFlow Lite format to ONNX format so it can run without TensorFlow. The weights were not retrained or altered.
FFmpeg
This software uses code of FFmpeg licensed under the LGPL v3. The app ships an LGPL-only build (version n8.1.3-9-g29e619e767, from BtbN FFmpeg-Builds, configured with --enable-version3 and without --enable-gpl or --enable-nonfree) as separate programs and shared DLLs that you can replace. Its source can be downloaded here; the build scripts are here. The licence text and source details also ship with the app in _internal\ffmpeg. SyncProof runs FFmpeg as a separate program and does not modify it. FFmpeg is a trademark of Fabrice Bellard, originator of the FFmpeg project.
Demo footage: Tears of Steel
The demo video on this site uses an excerpt of Tears of Steel (2012). (CC) Blender Foundation | mango.blender.org. Licensed under Creative Commons Attribution 3.0. Changes: the clip was trimmed, labelled, and its audio was deliberately shifted out of sync to demonstrate the fix. The Blender Foundation does not endorse SyncProof.
MIT licence text
Applies to YuNet (Copyright (c) 2020 Shiqi Yu) and ONNX Runtime (Copyright (c) Microsoft Corporation).
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.
Trademarks
Windows is a trademark of Microsoft Corporation. Zoom, OBS Studio and other product names mentioned on this site are trademarks of their owners and are used only to describe what kind of recordings SyncProof can check. SyncProof is not affiliated with or endorsed by any of them.