[BUG] Unable to record video after installing via apt.

[theslic3]

Using:
sudo apt install python3-picam2
to install picam2.

When using functionality such as .start_and_record_video():
from picamera2 import Picamera2
picam2 = Picamera2()
#video_config = picam2.create_video_configuration(main={"size":(1920,1080)})
picam2.start_and_record_video("test.mp4", duration=5)

Kept encountering :
Exception during process_requests()
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/picamera2/previews/null_preview.py", line 85, in handle_request
picam2.process_requests(self)
File "/usr/lib/python3/dist-packages/picamera2/picamera2.py", line 1301, in process_requests
encoder.encode(encoder.name, req)
File "/usr/lib/python3/dist-packages/picamera2/encoders/encoder.py", line 246, in encode
self._encode(stream, request)
File "/usr/lib/python3/dist-packages/picamera2/encoders/libav_h264_encoder.py", line 151, in _encode
frame = av.VideoFrame.from_numpy_buffer(m.array, format=self._av_input_format, width=self.width)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: type object 'av.video.frame.VideoFrame' has no attribute 'from_numpy_buffer'

I realised that ,after checking av version history...
Only reference to VideoFrame.from_numpy_buffer() was in version 14.0.0.
The version of av used when installing picam2 through apt versus pip is: 10.0.0 versus the 14.0.0 version.
When I installed av version 14 through pip, voila, same script worked.

Hardware :
Pi CM5,
AI Camera

[davidplowman]

Yes, previously we were using a custom version of Python AV which is of course only a source of problems in the longer term. So I upstreamed the changes I need, which got merged in version 14.0.0, and updated our code to work with the new, but now mainline, Python AV. As a bonus complication, we can't ship 14.0.0 in our Bookworm apt repositories, so I had to backport the new functionality to 12.3.0 which is now what's in our apt repo.

Mostly I recommend getting everything from apt and doing sudo apt update plus sudo apt full-upgrade because you get known versions that have been verified as being compatible. But it is also possible to select particular versions from pip that are known to work together, so version 14.0.0 which you get from pip (and all future version, having done all this work!) should be OK with an up-to-date Picamera2. Clear as mud?? :)