I connected two Lepton 3.5 + PureThermal 3 cameras to RPI4 and tested running them simultaneously.
However, I found that only one camera is functional at a time.
To address this, I created udev rules to assign symbolic links to each device, and confirmed that the devices are correctly recognized as separate entries (/dev/leptonA, /dev/leptonB)
Despite this, when I attempt to access both cameras using OpenCV and display the images, still only one camera works.
As another test, I tried running the following command:
ffplay /dev/video0 & ffplay /dev/video2
But again, only one camera streams video successfully.
Additionally, the following log message was shown:
[video4linux2,v4l2 @ 0x7f74000ba0] ioctl(VIDIOC_STREAMON): No space left on device
/dev/video2: No space left on device
However, I found that only one camera is functional at a time.
To address this, I created udev rules to assign symbolic links to each device, and confirmed that the devices are correctly recognized as separate entries (/dev/leptonA, /dev/leptonB)
Despite this, when I attempt to access both cameras using OpenCV and display the images, still only one camera works.
As another test, I tried running the following command:
ffplay /dev/video0 & ffplay /dev/video2
But again, only one camera streams video successfully.
Additionally, the following log message was shown:
[video4linux2,v4l2 @ 0x7f74000ba0] ioctl(VIDIOC_STREAMON): No space left on device
/dev/video2: No space left on device
Statistics: Posted by sunghyun96 — Tue Jul 08, 2025 2:54 am — Replies 0 — Views 28