problems wanting to use MMM-Face-Reco-DNN and MMM-MotionDetector at the same time

[cala]

Hello averyone mates,

I write because I am having problems when wanting to use several modules that both need access to the camera. Specifically, they are MMM-Face-Reco-DNN and MMM-MotionDetector.
The error that the console shows me is the following:

[28.04.2021 19:38.32.307] [LOG] [MMM-Face-Reco-DNN] starting video stream…
[28.04.2021 19:38.37.680] [ERROR] Whoops! There was an uncaught exception…
[28.04.2021 19:38.37.763] [ERROR] PythonShellError: [ WARN:0] global /home/pi/opencv/opencv-4.5.0/modules/videoio/src/cap_gstreamer.cpp (1761) handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module v4l2src0 reported: Device ‘/dev/video0’ is busy
[ WARN:0] global /home/pi/opencv/opencv-4.5.0/modules/videoio/src/cap_gstreamer.cpp (888) open OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0] global /home/pi/opencv/opencv-4.5.0/modules/videoio/src/cap_gstreamer.cpp (480) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
[ WARN:0] global /home/pi/opencv/opencv-4.5.0/modules/videoio/src/cap_v4l.cpp (893) open VIDEOIO(V4L2:/dev/video0): can’t open camera by index
Traceback (most recent call last):
File “modules/MMM-Face-Reco-DNN/tools/facerecognition.py”, line 111, in
frame = imutils.resize(originalFrame, width=500)
File “/home/pi/.local/lib/python3.7/site-packages/imutils/convenience.py”, line 69, in resize
(h, w) = image.shape[:2]
AttributeError: ‘NoneType’ object has no attribute ‘shape’

at PythonShell.parseError (/home/pi/MagicMirror/modules/MMM-Face-Reco-DNN/node_modules/python-shell/index.js:254:21)
at terminateIfNeeded (/home/pi/MagicMirror/modules/MMM-Face-Reco-DNN/node_modules/python-shell/index.js:129:32)
at ChildProcess.<anonymous> (/home/pi/MagicMirror/modules/MMM-Face-Reco-DNN/node_modules/python-shell/index.js:121:13)
at ChildProcess.emit (events.js:315:20)
at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12) {

executable: ‘python3’,
options: null,
script: ‘modules/MMM-Face-Reco-DNN/tools/facerecognition.py’,
args: [
‘–cascade=modules/MMM-Face-Reco-DNN/tools/haarcascade_frontalface_default.xml’,
‘–encodings=modules/MMM-Face-Reco-DNN/tools/encodings.pickle’,
‘–usePiCamera=0’,
‘–source=0’,
‘–rotateCamera=0’,
‘–method=dnn’,
‘–detectionMethod=hog’,
‘–interval=2000’,
‘–output=0’,
‘–extendDataset=False’,
‘–dataset=modules/MMM-Face-Reco-DNN/dataset/’,
‘–tolerance=0.6’
],
exitCode: 1
}

Does anyone know how it could be solved? the camera used is an “eye ps3” and everything about a rapsberry pi 3.

Thanks in advance!

[sdetweil]

@cala there is no camera sharing. I have thought about looking into that. but no time yet.

use linux motion project (handles all the cameras and has data and events for motion and frame capture)

and allow registration for movement info, pub/sub

either just info
motion start/stop
and/or
video frames for opencv for reco
and/or
a stream of video to be used however

[cala]

@sdetweil thank you very much for your answer.
I will try to configure it in the way in which you are indicating me.
I will update this post if I can get it to work on that way.
Best regards.

[sdetweil]

@cala I was saying it would be nice if.

it does not work that way today

[cala]

@sdetweil motion mounted and feeding the modules of Magic Mirror through the stream direction that motion creates, and they are working pretty well.
There is a little more consumption in the resources, but in the absence of testing it more I would say that the problem is solved.