UNSOLVED MMM-Facial-Recognition with PiCam doesn't start

[bhumi.ranawat]

We’re using PiCam for MMM-Facial-Recognition
The camera works well with capture and training but when we start MagicMirror code the picam doesn’t start
If anyone has any solution please reply fast we have to submit our project soon

[SdeGeata]

Same here, I’m getting the following errors on python tools.facerecognition.py

Remember to set the name list environment variable FACE_USERS
Loading PiCamera
PiCamera loaded
Loading training data...
mmal: mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPC
mmal: mmal_port_enable: failed to enable connected port (vc.null_sink:in:0(OPQV))0x6c405410 (ENOSPC)
mmal: mmal_connection_enable: output port couldn't be enabled
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
    self.run()
  File "/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/common/picam.py", line 25, in run
    with picamera.PiCamera() as camera:
  File "/usr/lib/python3/dist-packages/picamera/camera.py", line 433, in __init__
    self._init_preview()
  File "/usr/lib/python3/dist-packages/picamera/camera.py", line 513, in _init_preview
    self, self._camera.outputs[self.CAMERA_PREVIEW_PORT])
  File "/usr/lib/python3/dist-packages/picamera/renderers.py", line 558, in __init__
    self.renderer.inputs[0].connect(source).enable()
  File "/usr/lib/python3/dist-packages/picamera/mmalobj.py", line 2212, in enable
    prefix="Failed to enable connection")
  File "/usr/lib/python3/dist-packages/picamera/exc.py", line 184, in mmal_check
    raise PiCameraMMALError(status, prefix)
picamera.exc.PiCameraMMALError: Failed to enable connection: Out of resources

Training data loaded!
OpenCV Error: Assertion failed (!buf.empty() && buf.isContinuous()) in imdecode_, file /home/pi/opencv/modules/imgcodecs/src/loadsave.cpp, line 637
Traceback (most recent call last):
  File "tools.facerecognition.py", line 45, in <module>
    frame = camera.read()
  File "/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/common/picam.py", line 55, in read
    image = cv2.imdecode(data, 1)
cv2.error: /home/pi/opencv/modules/imgcodecs/src/loadsave.cpp:637: error: (-215) !buf.empty() && buf.isContinuous() in function imdecode_

[SdeGeata]

After more fiddling, I get this in terminal:

[MMM-Facial-Recognition-OCV3] Facerecognition started...
[MMM-Facial-Recognition-OCV3] Loading training data...
[MMM-Facial-Recognition-OCV3] Training data loaded!
[MMM-Facial-Recognition-OCV3] --------------------
[MMM-Facial-Recognition-OCV3] PiCam loaded...
Whoops! There was an uncaught exception...
{ Error: mmal: mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPC
mmal: mmal_port_enable: failed to enable connected port (vc.null_sink:in:0(OPQV))0x6c513840 (ENOSPC)
mmal: mmal_connection_enable: output port couldn't be enabled
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/common/picam.py", line 25, in run
    with picamera.PiCamera() as camera:
  File "/usr/lib/python2.7/dist-packages/picamera/camera.py", line 433, in __init__
    self._init_preview()
  File "/usr/lib/python2.7/dist-packages/picamera/camera.py", line 513, in _init_preview
    self, self._camera.outputs[self.CAMERA_PREVIEW_PORT])
  File "/usr/lib/python2.7/dist-packages/picamera/renderers.py", line 558, in __init__
    self.renderer.inputs[0].connect(source).enable()
  File "/usr/lib/python2.7/dist-packages/picamera/mmalobj.py", line 2212, in enable
    prefix="Failed to enable connection")
  File "/usr/lib/python2.7/dist-packages/picamera/exc.py", line 184, in mmal_check
    raise PiCameraMMALError(status, prefix)
PiCameraMMALError: Failed to enable connection: Out of resources

OpenCV Error: Assertion failed (!buf.empty() && buf.isContinuous()) in imdecode_, file /home/pi/opencv/modules/imgcodecs/src/loadsave.cpp, line 637
Traceback (most recent call last):
  File "modules/MMM-Facial-Recognition-OCV3/lib/mm/facerecognition.py", line 69, in <module>
    image = camera.read()
  File "/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/common/picam.py", line 55, in read
    image = cv2.imdecode(data, 1)
cv2.error: /home/pi/opencv/modules/imgcodecs/src/loadsave.cpp:637: error: (-215) !buf.empty() && buf.isContinuous() in function imdecode_


    at PythonShell.parseError (/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/node_modules/python-shell/index.js:190:17)
    at terminateIfNeeded (/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/node_modules/python-shell/index.js:98:28)
    at ChildProcess.<anonymous> (/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/node_modules/python-shell/index.js:88:9)
    at ChildProcess.emit (events.js:182:13)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:237:12)
  executable: 'python',
  options: null,
  script:
   'modules/MMM-Facial-Recognition-OCV3/lib/mm/facerecognition.py',
  args:
   [ '{"threshold":80,"useUSBCam":false,"trainingFile":"/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/training.xml","interval":2,"logoutDelay":15,"users":["Stiofan","Gab"],"defaultClass":"default","everyoneClass":"everyone","welcomeMessage":true}' ],
  exitCode: 1 }
MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection?
If you think this really is an issue, please open an issue on GitHub: https://github.com/MichMich/MagicMirror/issues