Two small desktop apps that do the same job — preview a UVC (USB Video Class) camera, switch device and mode, and capture what you see. Same functionality, two stacks; pick whichever fits the machine you are on.
| Implementation | Stack | What you get |
|---|---|---|
python/ |
Python 3 · OpenCV · tkinter | Runs straight from source, no build step. Switch camera and resolution, take a photo. |
qt/ |
C++ · Qt 5 · QtMultimedia | A packaged desktop app. Adds frame-rate selection, photo capture and video recording. |
Both enumerate the cameras attached to the machine, let you switch between them, preview live at the selected resolution, and save the capture into your home directory as capture.png (the Qt build also writes video.* when recording). Each has its own debian/ directory, so either one can be built into a .deb on its own.
Requirements: Python 3.8+, OpenCV 4.2+, tkinter, Pillow, and a UVC device that is already plugged in.
sudo apt install python3-tk python3-opencv python3-pil python3-pil.imagetk
python3 python/uvc-camera.pyChoose the camera and the resolution from the dropdowns, then hit Take a picture. The frame lands in your home directory as capture.png — only one is kept, a new one overwrites it. The resolution list is probed from the device at startup, so the options you see are the ones the camera actually reports.
Peek.2023-02-21.11-08.mp4
Build the Debian package:
cd python && dpkg-buildpackage -b -us -ucRequirements: Qt 5 development packages and qmake (qtbase5-dev, qtmultimedia5-dev, libqt5multimedia5-plugins), plus the GStreamer bits listed in qt/debian/control.
cd qt
qmake openqtcamera-rebion.pro
make -j"$(nproc)"
./uvc-camera/uvc-cameraFrame-rate selection and video recording are what this build adds over the Python one. Photo and video both go to your home directory (capture.png, video.*), one of each.
Build the Debian package:
cd qt && dpkg-buildpackage -b -us -uc- Develops and runs on Ubuntu 20.04 (the Python build was verified against python3.8 + OpenCV 4.2).
- Cameras are discovered at startup, so connect the device before launching. If none is found the app reports it and exits instead of sitting on a dead preview.
- The two implementations are independent; there is no shared code between them.
同一个功能的两个实现：python/ 是 Python + OpenCV + tkinter 的轻量版，直接从源码跑，支持切换摄像头、切换分辨率、拍照；qt/ 是 C++ / Qt5 的完整版，多了帧率切换和录像。两者都会自动列出已接入的摄像头并实时预览，拍照结果保存在用户家目录的 capture.png（Qt 版录像存 video.*，均只保留最新一份）。各自带 debian/ 目录，可以分别打成 deb 包。
MIT — see LICENSE.