valkka-live doesn't launch properly

[wkelongws]

I was trying valkka-live on my Ubuntu 16.04 machine with python 3.5. After I installed valkka-live following the instructions (https://elsampsa.github.io/valkka-live/_build/html/index.html), I got the follow message in terminal after executing the valkka-live binary:

valkka.mvision.__init__ : could not import module alpr : ''
valkka.mvision.__init__ : could not import module yolo3 : 'No module named 'darknet''
valkka.mvision.__init__ : could not import module yolo2 : 'No module named 'darknet''
valkka.mvision.__init__ : could not import module yolo3tiny : 'No module named 'darknet''
mvision scan: submodule valkka.mvision.tools missing MVisionProcess
mvision scan: submodule valkka.mvision.base missing MVisionProcess
mvision scan: found machine vision class with name, tag and max_instances
mvision scan: found machine vision class with name, tag and max_instances
mvision scan: submodule valkka.mvision.constant missing MVisionProcess
mvision scan: submodule valkka.mvision.multiprocess missing MVisionProcess
valkka.live : loading config file for version number
DeviceList :  clearSelection
QCheckBoxColumn: state_changed_slot : live_main
SlotFormSet :  showCurrent: current_row= None
QCheckBoxColumn: state_changed_slot : bind
MemoryConfigForm :  no row!
CPUScheme : cores 8
valkka.live : Using default mem config
CPUScheme : cores 8
GPUHandler: findXScreens: true screens: [<PySide2.QtGui.QScreen object at 0x7f781c0d95c8>]
gpuhandler : GPUHandler: starting OpenGLThread with :0.0
GLX_EXT_swap_control
OpenGLThread::setSwapInterval: could not set swap interval
OpenGLThread::setSwapInterval: could not set swap interval
gpuhandler : GPUHandler: OpenGLThread started

And this is a "Valkka Live" X window popped up with a blank/white window. What could be the issue? (It doesn't look like a python issue which was reported in the other ticket)

[elsampsa]

Hi,

Thanks for the report.

Here is the python issue you commented: https://github.com/elsampsa/valkka-live/issues/1

I do think its a python issue. As explained in that ticket, there is a devilish api change in the pkgutil python library, when going from Ubuntu 16 (python 3.5) to Ubuntu 18 (python 3.6).

We could try to find time for testing & debugging the program in python3.5, but I'm not sure if it's worth the effort, since Ubuntu 16 LTS is starting to be a bit obsolete linux distro.

[eranpet]

A comment: I have been able run valkka-live in python3.5 virtualenv using Ubuntu 18 (did it following our instructions: https://stackoverflow.com/questions/2812520/dealing-with-multiple-python-versions-and-pip/50319252#50319252 )

so maybe the python3.5 is not an issue here.

[wkelongws]

@elsampsa @eranpet Thanks for the quick reply. I don't think it is python version related and I don't see how the issue can be related to Ubuntu version as well since there are no error message thrown out... Does any of the terminal output look abnormal and worth an attention here? And actually based on my experience even though Ubuntu 18 has been out there for a long while but still quite large efforts (if not the majority) in the filed of AI, machine learning are spent under Ubuntu 16. And IMO Valkka is advantaged in integrating mvison stuff with streaming so to me maybe Ubuntu 16 is even more relevant than Ubuntu 18.

[elsampsa]

Good points.

The output you posted .. I can't see anything fishy there. Two questions:

• Have you been able to use the test_studio_1.py program to show any video ? https://elsampsa.github.io/valkka-examples/_build/html/testsuite.html#test-studio-1-py .. or equally, in the tutorial, were you able to show video using Valkka?
• In the valkka-examples main directory, can you please run

  python3 quicktest.py

  and post the results here?

[eranpet]

@elsampsa : you did not look at that outpt carefully enough : I'm not getting this : OpenGLThread::setSwapInterval: could not set swap interval

[elsampsa]

nah.. it's not that. But anyway ..

• You have NVIDIA card with NVIDIA's proprietary drivers, right?
• How many frames does the command glxgears report?

[wkelongws]

@elsampsa

• I am able to run test_studio_1.py to show videos (multiple video streams) by hitting "RUN(QT)". (But I need to comment out line61: https://github.com/elsampsa/valkka-examples/blob/master/api_level_2/qt/test_studio_1.py#L61 to run it because TimeCorrectionType_dummy, TimeCorrectionType_none, TimeCorrectionType_smart are not defined in valkka.core and they are not used in test_studio_1.py)

• Here is the output from the quicktest.py:

  
  (valkka) shuo@shuo-v100:~/Shuo/valkka-examples$ python quicktest.py 

Loading numerical python Numpy loaded ok Numpy loaded from /home/shuo/.local/lib/python3.5/site-packages/numpy/init.py Numpy version 1.16.3

Loading Valkka Valkka loaded ok Version 0.10.0 Core loaded from /usr/lib/python3/dist-packages/valkka/core/init.py

Testing Valkka classes Valkka classes ok

Checking Valkka python examples version: 0.10.0

Loading OpenCV OpenCV loaded ok Version 4.1.0 Loaded from /home/shuo/.local/lib/python3.5/site-packages/cv2/cv2.cpython-35m-x86_64-linux-gnu.so

* I am using nvidia card and vidia driver, here is the output from `nvidia-smi`:

![2](https://user-images.githubusercontent.com/14045078/56921663-338e5b80-6a7b-11e9-9c06-062cc4c4588c.png)
(display is connected to TITAN X)

* here is the output from glxgears:

![3](https://user-images.githubusercontent.com/14045078/56921723-633d6380-6a7b-11e9-897d-b75c80ad0d00.png)

[elsampsa]

@eranpet I have an idea how you can spend your 1.st May vacation day : install valkka on ubuntu 16 LTS (with nvidia) and try it. :)

[elsampsa]

Let's try one more thing.

What is your PySide2 (the python qt bindings) version?

It should be 5.11.1

You can see this by updating valkka-examples and running python3 quicktest.py again

[wkelongws]

It is 5.11.1. Same blank window and console message when running valkka-live I updated valkka and here is the quicktest.py output:

Loading numerical python
Numpy loaded ok
   Numpy loaded from /home/shuo/anaconda2/envs/valkka/lib/python3.7/site-packages/numpy/__init__.py
   Numpy version     1.16.3

Loading Valkka
Valkka loaded ok
   Version           0.11.0
   Core loaded from  /home/shuo/anaconda2/envs/valkka/lib/python3.7/site-packages/valkka/core/__init__.py

   Testing Valkka classes
   Valkka classes ok

Checking Valkka python examples
   version: 0.11.0

Loading OpenCV
OpenCV loaded ok
   Version       3.4.2
   Loaded from   /home/shuo/anaconda2/envs/valkka/lib/python3.7/site-packages/cv2.cpython-37m-x86_64-linux-gnu.so

Loading PySide2
   Version       5.11.1
   Loaded from   /home/shuo/.local/lib/python3.7/site-packages/PySide2/__init__.py

(I just like to use conda and keep python related stuff in virtual env)

[elsampsa]

Yet another idea ..

• libValkka is compiled against a certain version of numpy
• Maybe the numpy version (cpp header files) are inconsistent and then there is some weird problem..?
• Could you please try with the numpy version that comes with your distributions python3-numpy package? (as installed with apt-get)

[wkelongws]

I did a fresh installation of Ubuntu 18.04 and then install valkka-live. It worked!

There is an issue initially related to the Xserver:

gpuhandler : GPUHandler: starting OpenGLThread with :0.0
Invalid MIT-MAGIC-COOKIE-1 keyOpenGLThtead: initGLX: cannot connect to X server :0.0

So I changed https://github.com/elsampsa/valkka-live/blob/master/valkka/live/gpuhandler.py#L54 to x_connection = ":1." + str(n_gpu) then it worked.

I have tested mvision with both ALPR and YOLO and both works well!

One small bug I found is the Camera List doesn't display the port correctly from the configuration. See screen captures below, the port 1935 is not included in the camera list, thus the link cannot be properly opened.

Thanks and I am closing this ticket now.