Add libv4l-dev to support USB camera#6062
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A-Artemis
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a team,
Radwan-Ibrahim,
leoll2 and
samet-akcay
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Pull request overview
This PR improves USB camera support in the application runtime by ensuring the container has V4L2 userspace dependencies and that OpenCV uses an appropriate capture backend for USB cameras.
Changes:
- Add V4L2 userspace dependency installation (and video-group membership) in the runtime Docker image.
- Extend
BaseOpenCVStreamto accept an OpenCVapi_preferencebackend parameter. - Select an OS-appropriate OpenCV capture backend for
USBCameraStream.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| application/recipes.justfile | Updates install-uv version parsing/comparison logic. |
| application/docker/Dockerfile | Adds video group membership and installs libv4l package(s) for USB camera support. |
| application/backend/app/stream/usb_camera_stream.py | Chooses an OpenCV backend per OS for USB camera capture. |
| application/backend/app/stream/base_opencv_stream.py | Adds api_preference plumbing into cv2.VideoCapture(...). |
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leoll2
reviewed
Apr 13, 2026
| _USB_CAMERA_BACKENDS: dict[str, int] = { | ||
| "Linux": cv2.CAP_V4L2, | ||
| "Windows": cv2.CAP_MSMF, | ||
| "Darwin": cv2.CAP_AVFOUNDATION, |
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Did you by chance test all 3?
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I cannot test on Darwin.
leoll2
approved these changes
Apr 13, 2026
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Summary
Adds libv4l to the docker image to support USB cameras
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