Flip external camera upside down

sebastian-65 · 2024-07-09 18:35:00

I have external logitech BRIO which I need to mount upside down. Is there any way to flip this camera to be used with Vivaldi browser in online conferences unfliped?

Any ideas are welcome.

V1del · 2024-07-09 19:20:59

Something along the lines of

sudo v4l2-ctl -d /dev/video0 --set-ctrl=rotate=180

should™ work. Adjust video0 should it be something else

sebastian-65 · 2024-07-10 09:19:11

Thanks for reply! In my case device is /dev/video2. I'm getting error though:

sebastian@nuvo:~$ sudo v4l2-ctl -d /dev/video2 --set-ctrl=rotate=180
unknown control 'rotate'

I can't even find rotate control:

sebastian@nuvo:~$ v4l2-ctl --list-ctrls

User Controls

                     brightness 0x00980900 (int)    : min=0 max=100 step=1 default=50 value=50
                       contrast 0x00980901 (int)    : min=0 max=100 step=1 default=50 value=50
                     saturation 0x00980902 (int)    : min=0 max=100 step=1 default=50 value=50
                            hue 0x00980903 (int)    : min=0 max=100 step=1 default=50 value=50
        white_balance_automatic 0x0098090c (bool)   : default=1 value=1
                          gamma 0x00980910 (int)    : min=0 max=100 step=1 default=50 value=50
           power_line_frequency 0x00980918 (menu)   : min=0 max=3 default=2 value=2 (60 Hz)
      white_balance_temperature 0x0098091a (int)    : min=2500 max=6500 step=10 default=4500 value=4500 flags=inactive
                      sharpness 0x0098091b (int)    : min=0 max=100 step=1 default=50 value=50

Camera Controls

                  auto_exposure 0x009a0901 (menu)   : min=0 max=3 default=3 value=3 (Aperture Priority Mode)
         exposure_time_absolute 0x009a0902 (int)    : min=50 max=10000 step=1 default=166 value=166 flags=inactive
     exposure_dynamic_framerate 0x009a0903 (bool)   : default=0 value=1

I have installed v4l2-ctl in version 1.26.1.

V1del · 2024-07-10 15:18:37

If the cam doesn't have such a control, you might be able to create a secondary v4l2 device with v4l2-loopback that you stream the flipped image through ffmpeg or so: https://stackoverflow.com/a/63943783 https://wiki.archlinux.org/title/V4l2loopback

sebastian-65 · 2024-07-12 16:54:17

Thank you V1del, since it gets complicated, I'm rather going to disassembly the camera and create a special mount that would allow to attach it to the bottom of the monitor, while being rotated upwards.

I do appreciate your effort, though. Thanks, you're a legend!

Arch Linux

#1 2024-07-09 18:35:00

Flip external camera upside down

#2 2024-07-09 19:20:59

Re: Flip external camera upside down

#3 2024-07-10 09:19:11

Re: Flip external camera upside down

#4 2024-07-10 15:18:37

Re: Flip external camera upside down

#5 2024-07-12 16:54:17

Re: Flip external camera upside down

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