[libcamera-devel] How to displace viewfinder using DRM/KMS

[Eric Curtin]

Hi Guys,

To start thanks so much for your work on libcamera.

I am interested in running the cam app via DRM/KMS on my laptop and
afterwards on my raspberry pi. I have figured out how to select the
correct camera and select the correct display to output to. But how
can I get them to play nicely together without "No mode matching
1280x720", "Failed to configure frame sink", "Failed to start camera
session", "Unable to find display pipeline for format MJPEG", etc.

I'm a bit of a newbie to graphics and cameras, so any help to get this
running would be greatly appreciated!

$ sudo LD_LIBRARY_PATH="/usr/local/lib:/usr/local/lib64" cam -c 1 -C4 -DeDP-1
[7:12:21.427200555] [75751]  INFO Camera camera_manager.cpp:293
libcamera v0.0.0+3119-2f75a7e5
Using camera \_SB_.PCI0.XHC_.RHUB.HS08-8:1.0-13d3:5405 as cam0
[7:12:21.534685678] [75751]  INFO Camera camera.cpp:937 configuring
streams: (0) 1280x720-MJPEG
No mode matching 1280x720
Failed to configure frame sink
Failed to start camera session
curtine at curt 17:00:12 1
$ sudo LD_LIBRARY_PATH="/usr/local/lib:/usr/local/lib64" cam -c 1 -C4 -DDP-1
[7:12:25.392692897] [75760]  INFO Camera camera_manager.cpp:293
libcamera v0.0.0+3119-2f75a7e5
Using camera \_SB_.PCI0.XHC_.RHUB.HS08-8:1.0-13d3:5405 as cam0
[7:12:25.497724802] [75760]  INFO Camera camera.cpp:937 configuring
streams: (0) 1280x720-MJPEG
Unable to find display pipeline for format MJPEG
Failed to configure frame sink
Failed to start camera session

Is mise le meas/Regards,

Eric Curtin