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Camera board • Camera output on composite video via DRM

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Replying to 6by9's post here: viewtopic.php?t=370287&sid=7aa1f5e4c7b6 ... d#p2219179
Open /boot/firmware/config.txt, find the line "dtoverlay=vc4-kms-v3d" and change it to "dtoverlay=vc4-kms-v3d,composite". Reboot. This should have disabled the HDMI output and enabled the composite video out. (I vaguely recall there is an option in raspi-config to achieve the same change).

All rpicam-* (or libcamera-* on older systems) apps should now render to the composite output via the DRM renderer (I'm assuming you're not booting into X11 or other windowing environment).
The tty does show on composite. However, I do not see any camera preview from `rpicam-vid`, just the frame counter text output. I tried options like fullscreen and manually setting preview dimensions. Fresh installation of Pi OS Lite on Pi 5 with official Global Shutter camera. The preview was working on a previous desktop install.

Statistics: Posted by Augmented Garage — Fri Jun 06, 2025 4:05 pm



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