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kbingham / libcamera

libcamera - Making complex cameras easy. This is a personal fork, please use the upstream repository at https://git.libcamera.org/libcamera/libcamera.git/
https://libcamera.org
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Installing libcamera from source on docker container succeeds but cannot import libcamera into python #74

Closed habjoel closed 1 year ago

habjoel commented 1 year ago

Hey there, I am trying to get libcamera to work inside my docker container that is based on the arm64v8/python3.9-bullseye docker image. My ultimate goal is to get libcamera working inside a docker container on my Raspberry Pi CM4.

I have gone through the installation steps specified here. and I used the following options with meson:

meson build --buildtype=release -Dpipelines=raspberrypi -Dipas=raspberrypi -Dv4l2=true -Dgstreamer=enabled -Dtest=false -Dcam=enabled -Dqcam=disabled -Dpycamera=enabled

The installation did not throw any errors and I built the python bindings by enabling pycamera. However I cannot really import libcamera into my python. import libcamera somehow only works if I am under root directory (/) and I cannot import any submodules such as from libcamera import controls throws an ImportError: cannot import name 'controls' from 'libcamera' (unknown location). From every other location nothing works (ModuleNotFoundError: No module named 'libcamera'). Moreover, I can only find the header files of libcamera under /usr/local/include but no source files are under /usr/local/src. Also, it doesn't show the libcamera package if I search for it using dpkg -l | grep libcamera

Does anyone have a clue how to solve this? Obviously, I installed everything as a root user as this is the default inside Docker containers. Is that a problem? Moreover, I am using a python 3.9 specific docker image so this should be the only python inside the container.

Thank you for any help!

kbingham commented 1 year ago

I'm not sure what the python search paths are. Google to find out how to print those on your system, then match up where you're installing the libcamera package. On a build here for instance it's gone to :

You might want to add -Dprefix=/usr on your build to install to /usr or add /usr/local/lib/..... to your python search paths.

habjoel commented 1 year ago

thanks a lot. It worked by adding -Dprefix=/usr and adding /usr/lib/aarch64-linux-gnu/python3.9/site-packages/ to my python path. In addition, I need to use picamera2. I installed it onto my docker container using pip install picamera2. The resulting version is 0.3.9. As I import it into python (import picamera2), it throws the following error:

ImportError: cannot import name 'convert_from_libcamera_type' from 'picamera2.utils' (/usr/local/lib/python3.9/site-packages/picamera2/utils/__init__.py)

Might there be some kind of version mismatch between picamera2 and libcamera?

Thanks for any help!

kbingham commented 1 year ago

I was going to reply to say if you're having issues with picamera2 - it's better to ask on that project. It's separate, but it looks like you already have!

Sounds like you've worked out the issue over there so closing this.