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While I run "python3 ./stream_infer.py " on the raspberrypi, I got this wrong. Ask for help!!!

pi@raspberrypi:~/ncapi/py_examples/stream_infer $ python3 ./stream_infer.py

** (stream_infer.py:2841): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
Number of categories: 1000
Device 0 Address: 1.2 - VID/PID 03e7:2150
Starting wait for connect with 2000ms timeout
Found Address: 1.2 - VID/PID 03e7:2150
Found EP 0x81 : max packet size is 512 bytes
Found EP 0x01 : max packet size is 512 bytes
Found and opened device
Performing bulk write of 825136 bytes...
Successfully sent 825136 bytes of data in 46.907734 ms (16.775720 MB/s)
Boot successful, device address 1.2
Found Address: 1.2 - VID/PID 040e:f63b
done
Booted 1.2 -> VSC
Segmentation fault

Comments

  • 13 Comments sorted by Votes Date Added
  • when I do the comment "sudo apt-get install at-spi2-core" .
    I can Solve the problem ----------------- ** (stream_infer.py:2841): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files

    but there are also have problem , because i can not get the Camera stream. and get this result

    pi@raspberrypi:~/ncapi/py_examples/stream_infer $ python3 ./stream_infer.py
    Number of categories: 1000
    Device 0 Address: 1.2 - VID/PID 03e7:2150
    Starting wait for connect with 2000ms timeout
    Found Address: 1.2 - VID/PID 03e7:2150
    Found EP 0x81 : max packet size is 512 bytes
    Found EP 0x01 : max packet size is 512 bytes
    Found and opened device
    Performing bulk write of 825136 bytes...
    Successfully sent 825136 bytes of data in 46.936681 ms (16.765374 MB/s)
    Boot successful, device address 1.2
    Found Address: 1.2 - VID/PID 040e:f63b
    done
    Booted 1.2 -> VSC
    Segmentation fault
    pi@raspberrypi:~/ncapi/py_examples/stream_infer $

  • export NO_AT_BRIDGE=1

  • I have try run "export NO_AT_BRIDGE=1"comment , but it does not work.

  • @tiandixing Are you using a Raspberry Pi Camera or a USB camera? This particular example (stream_infer) uses a USB web camera.

  • @tiandixing, if you are trying to perform image classification on live camera feed using RPi camera module, you can try one of the following:

    1. Modify stream_infer to use the PiCamera API
    2. Enable bcm2835-v4l2 driver so that RPi camera shows up as a V4L2 device.

    Here's a blog post that uses live-image-classifier to run image classification on RPi Cam's live feed - https://movidius.github.io/blog/battery-powered-dl-engine/

  • @Tome_at_Intel I used a USB camera .
    while I use sudo python3 ./stream_infer.py , "Segmentation fault"had been Solved, but I can not open the GUI .

    pi@raspberrypi:~/ncapi/py_examples/stream_infer $ python3 ./stream_infer.py
    Number of categories: 1000
    Device 0 Address: 1.2 - VID/PID 03e7:2150
    Starting wait for connect with 2000ms timeout
    Found Address: 1.2 - VID/PID 03e7:2150
    Found EP 0x81 : max packet size is 512 bytes
    Found EP 0x01 : max packet size is 512 bytes
    Found and opened device
    Performing bulk write of 825136 bytes...
    Successfully sent 825136 bytes of data in 46.936681 ms (16.765374 MB/s)
    Boot successful, device address 1.2
    Found Address: 1.2 - VID/PID 040e:f63b
    done
    Booted 1.2 -> VSC

    I want try the example like this :smile:
    https://ncsforum.movidius.com/discussion/118/movidius-nc-sdk-1-07-07-with-raspberry-pi-support

    ASK FOR HELP !!! @Tome_at_Intel

  • the GUI is opened,and quickly shut down automaticly. can not get the Video stream。@Tome_at_Intel

  • @tiandixing Make sure you have installed the gstreamer 1.0 python dependencies by using the following command sudo apt-get install python-gst-1.0 gstreamer1.0-plugins-bad gstreamer1.0-libav. If you are getting a Myriad Error, please double check your graph files to ensure that the NCSDK version on your host machine and on your RPi are the same and recompile the graph file with mvNCCompile.

  • @AshwinVijayakumar We used your method, while we run "image-classIfie.py" ,we got error

    usr/local/lib/python3.4/dist-packages/mvnc/mvncapi.py line264,inGetResult raise Exception(Status(status)) Exception:mvncStatus.MYRIAD_ERROR
    mvnccompile command not found

  • @AshwinVijayakumar could you tell us how to install opencv3 in raspberrypi 3 B, when we run "import cv2" under python 3 , It tells wrong. Thank you very much!

  • could you tell us how to install opencv3 in raspberrypi 3 B, when we run "import cv2" under python 3 , It tells wrong

    OpenCV should have been installed as part of your NCSDK installtion (unless you chose not to, or you installed API only). However, you can install OpenCV by running https://github.com/movidius/ncsdk/blob/master/install-opencv.sh on your RPi. Note that there is no pip3 wheel for RPi, so the script will build & install from source - it takes quite a while to do this.

    usr/local/lib/python3.4/dist-packages/mvnc/mvncapi.py line264,inGetResult raise Exception(Status(status)) Exception:mvncStatus.MYRIAD_ERROR mvnccompile command not found

    The Exception:mvncStatus.MYRIAD_ERROR seems to be an issue with the API unable to access the NCS hardware; try unplugging the device, re-plug and re-run the program. I don't understand the relation of mvnccompile command not found with the first error. Can you please paste the full console output?

  • SINK_NAME="ximagesink"

    Try modifying pipeline by adding videoconvert element as below in stream_infer.py

    view_launch_str = "\
    queue max-size-buffers=2 leaky=downstream ! videoconvert !\
    %s name=%s" % (SINK_NAME, GST_VIEW_NAME)

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