# Third-party notices

## parse-video

The Douyin public share-page resolver in `internal/media/douyin.go` adapts the
approach in [wujunwei928/parse-video](https://github.com/wujunwei928/parse-video),
`parser/douyin.go`, reviewed at commit
`57590df94b49aafc827eb98e85c845eaa1cb3daf`.

Copyright (c) 2022 wujunwei928. Licensed under the MIT License. The full notice is
in [parse-video.txt](frontend/public/licenses/parse-video.txt) and is included
in the desktop's embedded frontend assets.

Qingfan implements bounded requests, address validation, cancellation,
work-ID matching and its existing media download/validation pipeline.
It does not include the upstream authenticated detail API, signature generator,
web service or other platform parsers.

## FFmpeg

The desktop installers bundle unmodified static builds of FFmpeg 9.0.2 (`ffmpeg`
and `ffprobe`), which Qingfan runs as separate programs. These builds include
libx264 and are licensed under the GNU General Public License version 3; the
full text ships beside the binaries as `FFMPEG-LICENSE.txt`.

- macOS: builds by Martin Riedl, <https://ffmpeg.martin-riedl.de/>
  (build scripts: <https://git.martin-riedl.de/ffmpeg/build-script>).
- Windows: "essentials" build by Gyan Doshi, <https://www.gyan.dev/ffmpeg/builds/>.
- FFmpeg source for this version: <https://ffmpeg.org/releases/ffmpeg-9.0.2.tar.xz>.

FFmpeg is a trademark of Fabrice Bellard. Copyright (c) 2000-2026 the FFmpeg developers.