Using the Compute Module & IO Board, I installed uv4l. I'm just not sure why this "software by http://linux-project.org" watermark showed up only when I use Stereoscopic Vision.

(No watermark when I use Dual Cameras separately: https://www.linux-projects.org/uv4l/tutorials/dual-cameras/)

enter image description here

Is there a way that I could hide/remove the watermark?

Also the stream itself works, but I can't get webrtc to work for dual camera at all.

  • try setting –text-annotation-background no and –text-overlay disabled, but sounds like a bug – rob Mar 27 '17 at 13:00
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    According to the developer feedback, "watermark on the compute module can be removed if UV4L is intended to be used commercially".... – l489977 Mar 28 '17 at 5:11

Instead of using uv4l's raspicam driver to driver the raspberry pi camera, you can use the kernel-based bcm2835-v4l2 driver. Just modprobe it and enable it using raspi-config, and you should have a /dev/video0 file.

After the device file appears, you can start uv4l with these options:

uv4l --external-driver --device-name=video0

The text overlay will be gone, and the rest of uv4l's features should work.

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Set the following in motion.conf and it will be removed:

v4l2_palette 8
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None of these worked for me.

Send a mail to info@linux.org asking them to remove the watermark stating the reason you are using for (project/thesis/commercial). They will ask you to mail the output of uv4l driver serial number provided you give credits in which you use it for.

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Just use sudo modprobe bcm2835-v4l2 and change the input device to /dev/video0.

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  • This is exactly what the top-voted answer suggests. – Dmitry Grigoryev Jul 5 '19 at 8:05

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