Error: Getting Blank Screen When Trying to capture image using v4l2

[SwasthikaPoojary]

Hi, I am trying to capture a image using a USB Camera(DMM72BUC02-ML Monochrome Board Camera) in Jetson Orin Nano. While I am able to capture images using the Aravis , I am facing issues when attempting to capture images via V4L2. Despite following the required steps, I am unable to retrieve an image from the camera using V4L2. I'm getting a blank screen.

Could you assist in resolving this issue or provide guidance on troubleshooting the V4L2 image capture on Orin Nano?

[TIS-Edgar]

Hi, A few questions to start:

What do you mean by capturing images using aravis? From the 72 camera?

How are you trying to capture images?

Does a /dev/video* node exist for the camera? ll /dev/v4l/by-id/ will show you associations between devices and nodes.

If it exists, does qv4l2 maybe work? That is a v4l2 test bench. sudo apt install qv4l2

[SwasthikaPoojary]

Thanks for the reply!

I’ve Followed the exact steps you have provided:

git clone https://github.com/TheImagingSource/tiscamera.git cd tiscamera sudo ./scripts/dependency-manager install mkdir build cd build cmake -DTCAM_BUILD_ARAVIS=OFF cmake -DTCAM_BUILD_V4L2=ON make sudo make install Then I ran command: gst-launch-1.0 tcambin ! videoconvert ! ximagesink to capture image, but I’m getting a blank screen.

When I ran the tcam-capture command, I get two options: Aravis and V4L2, I can capture image using Aravis and Unable to capture image using V4L2.

Does a /dev/video* node exist for the camera? ll /dev/v4l/by-id/ will show you associations between devices and nodes. -->Yes, the node exists for camera.

If it exists, does qv4l2 maybe work? That is a v4l2 test bench. sudo apt install qv4l2 ---> Tried this, but still unable to capture image using v4l2.

[TIS-Stefan]

Hello

you must use the cmake parameters in one command line:

cmake -DTCAM_BUILD_ARAVIS=OFF -DTCAM_BUILD_V4L2=ON ..

Did you run the Linux firmware update for your camera? If not, it is not v4l2 compatible. The firmware update can be cloned from https://github.com/TheImagingSource/tcam-firmware-update . The firmware to be written into your camera is dmk72uc02_162_uvc.euvc

Stefan