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How to use frambuffer devices? #13
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If you set the framebuffer as an input device, then you must set uvc gadget as an output device. v4l2-ctl --list-device uvc-gadget -f /dev/fb0 -u /dev/video0 In your command you use /dev/video1 which is probably a camera module. |
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I tried to use frambuffer instead of
/dev/video0
, but the webcam application show nothing.Here is what I did:
I also tried to force HDMI output mode, but no luck.
# cat /boot/config.txt [...] hdmi_force_hotplug=1 hdmi_drive=2
Camera preview mode on RasPi is using GPU, so I think it is easy to overlay text or image with Camera video output.
Could you give me more detail how to use framebuffer?
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