Reading from external camera

[NatalliSu]

I have an external camera, that is connected to my laptop. And, my laptop has its own webcam. I need to run prediction for the external camera. Could you give an example of CLI command for rtsp streaming external camera, please? I tryed

darknet_07_display_rtsp_stream rtsp://182.178.3.10:9254/w344 yolov4-tiny.cfg coco.names yolov4-tiny.weights

I know for sure that URL for camera is correct. There is an error message

Darknet V3 "Jazz" ←[1;37mv3.0-193-g0a3dca26←[0m
CUDA runtime version 12060 (←[1;37mv12.6←[0m), driver version 12070 (←[1;37mv12.7←[0m)
cuDNN version 12060 (←[1;37mv9.5.1←[0m), use of half-size floats is ←[1;37mENABLED←[0m
=> 0: ←[1;32mNVIDIA GeForce RTX 3080 Laptop GPU←[0m [#8.6], ←[1;33m16.0 GiB←[0m
OpenCV ←[1;37mv4.9.0←[0m, Windows 10 Pro
0 : compute_capability = 860, cudnn_half = 1, GPU: NVIDIA GeForce RTX 3080 Laptop GPU
Allocating workspace to transfer between CPU and GPU: 25.0 MiB
←[1;33mskipped validating of argument #0 "rtsp://182.178.3.10:9254/w344" (does not appear to be a valid parameter, file, or directory)←[0m
Connecting to stream rtsp://182.178.3.10:9254/w344...
Exception: failed to open the stream "rtsp://182.178.3.10:9254/w344"

When I tried darknet_08_display_webcam with flag -c number, like darknet_08_display_webcam -c 1 yolov4-tiny.cfg coco.names yolov4-tiny.weights, darknet always use camera of my laptop whatever number I enter.

[stephanecharette]

You have multiple problems in 1 issue. Please join the discord server if you want to discuss things, or at the very least create a separate issue.

[stephanecharette]

On the discord, Natallia reports that setting the OpenCV backend to CAP_ANY has solved the problem with the RTSP stream:

[stephanecharette]

Added checks for -c and --camera parameters to darknet_08_display_webcam. So non-default webcams can now be specified. For example:

darknet_08_display_webcam mscoco --camera 2

...which is the same as:

darknet_08_display_webcam mscoco -c 2