1 Topic by gnu

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Topic: /dev/video

/dev/video* does not exist, I can't turn on the webcam, any suggestions?

2 Reply by throgh

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Re: /dev/video

You need to add further information: What kind of hardware is that - integrated or external connected webcamera (USB-device)? What kind of usecase? Furthermore with what kind of software?

Human being in favor with clear principles and so also for freedom in soft- and hardware!

Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!

3 Reply by gnu

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Re: /dev/video

HARDWARE = Lenovo X200 [canoeboot_20250107]
SOFTWARE = I just wanted to test the integrated webcam with the command:

ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0 -vf "format=yuv420p" -f sdl "Webcam Feed"

4 Reply by throgh

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Re: /dev/video

Works so far flawless for me: Thinkpad T440p with own compiled Coreboot. When there is no device like:

/dev/video0 and /dev/video1 it seems to me that the integrated webcam maybe not connected or recognized.

Human being in favor with clear principles and so also for freedom in soft- and hardware!

Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!

5 Reply by gnu

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Re: /dev/video

I tried an old BIOS and the camera started working, I reinstalled the new BIOS and now it works...computer witchcraft.

6 Reply by throgh

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Re: /dev/video

Yes, a bit strange. But the enumeration of the device-tree is recognized over the next startup so it could have surely an impact throughout the older and newer BIOS-rom. smile

So the older rom may have granted better access while the newer rom had no further influence after that and the device-tree kept working.

Human being in favor with clear principles and so also for freedom in soft- and hardware!

Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!