Qt Version :5.15.3
Windows Version:Windows 10 professional 64bit(10.0,19044)
GPU :NVDIA GeForce GT 1030
GPU Driver Version:31.0.15.1694
Qeustion:
When I clcick QWebEngineView Qt Desinger crash,
But I don't know how resulve this question.
thx
qt engine crashed
Related
Like title, i'm trying to use Qt and FFmpeg to play audio. My code like this:
QAudioOutput *audio_output;
QIODevice *stream_out;
QAudioFormat audio_fmt;
audio_fmt.setSampleRate(44100);
audio_fmt.setChannelCount(2);
audio_fmt.setSampleSize(16);
audio_fmt.setCodec("audio/pcm");
audio_fmt.setByteOrder(QAudioFormat::LittleEndian);
audio_fmt.setSampleType(QAudioFormat::SignedInt);
QAudioDeviceInfo info = QAudioDeviceInfo::defaultOutputDevice();
if(!info.isFormatSupported(audio_fmt))
{
audio_fmt = info.nearestFormat(audio_fmt);
}
audio_output = new QAudioOutput(audio_fmt);
When i use QAudioDeviceInfo info = QAudioDeviceInfo::defaultOutputDevice()
i get PulseAudioService: pa_context_connect() failed error.
So how can i fix it?
By the way, i'm using Ubuntu 16.04 and Qt 5.14.2, and i have add 'mutilmedia' to Qt pro file
I checked my Qt file ,and i have audio dir in plugins, it's not lib problem. Also, i read this post ,but i don't know how to fix it, anybody have idea? Thank you guys,and my English is bad, wish you can understand what do i say.
Preface: I have very limited experience with linux and selenium in general. Also this is a multipart question.
Hi there,
I've written a script that I want to run on my Raspberry Pi model 3B which is running Raspbian OS.
I originally built it on a Windows machine (pretty stupid mistake to build it for the wrong platform but anyway) and now need to adapt it so it runs on the Pi.
The main thing I am concerned about is the usage of selenium and chromedriver. I have downloaded chromium-chromedriver (chromium-chromedriver 34.0.1847.116-0ubuntu2 in armhf (Release)) from this repository.
First Question
The file downloads as a .deb which I have never seen before. It opts to install, however I have no idea where it installs as it does not give the option to install to a different directory. I've tried search for it with find, but nothing comes up. Where does it go by default in Raspbian OS?
Second Question
I know I will have to change some expressions because I am using chromium-chromedriver instead of chrome driver, but I am unsure which ones as I don't know selenium that well. This is the main instance here. Do I just change all instances of "Chrome" including "chrome_options" to "Chromium/chromium_options"?
from selenium.webdriver import Chrome
from contextlib import closing
from selenium.webdriver.chrome.options import Options
chrome_options = Options()
chrome_options.add_argument("--headless")
chrome_options.add_argument("--disable-gpu")
chrome_options.add_argument("--no-sandbox")
#Scrape out the table information
with closing(Chrome(chrome_options=chrome_options)) as driver:
Lastly, for the purpose of finding the process with psutil and ending it with process.kill(), the text ID of the driver in task manager should just be chromium-chromedriver.exe right?
Any and all help and advice appreciated.
Thank you all for your time.
L
I developed a a tool in python 3.5 some time ago which currently only uses differential evolution from scipy to do its task. For some reasons I had to change settings on my machine and switch to use python in a virtual environment.
My specs now:
win 10 64 bit
used pip 9.0.1
numpy 1.12.1+mkl
scipy 0.19.0
python 3.6.1
I have a different env using python 2.7 flying around somewhere else.
Now my problem....everytime the differential evolution function gets its first set of data it crashes after returning the differential_evolution step value.
The differential_evolution call can be found under ./libraries/methods/differential_evoluation.py line 76
The pop-up Error is "Entry point 'mkl_blas_dgemm_alloc wasn't found in 'mkl_intel_thread.dll'." And the printed error is "Intel MKL FATAL ERROR: Cannot load mkl_intel_thread.dll." Please notice that my system language is german therfore the pop-up message was translated by me.
I don't know whether this is relevant but my directory structure is:
>some_place/location1/goal.py
>some_place/location2/env/
I didn't work with virtualenv before and in addition to this i used python 3.5. I'd appreciate any help or instructions on how to add more information to this case to help clarify my problem.
Yours sincerely
OK I'm back with more information. Maybe someone else will stumble uppon it. To be clear: I do not know the fix or reason. I just tried a bunch of stuff.
Using
python 3.5.3,numpy 1.11.1+mkl and scipy-0.18.0 or scipy-0.19.0
made the error disappear. I couldn't try numpy 1.11.1 or 1.11.2 for python 3.6 because this kind soul sadly doesn't offer those versions anymore. I found the 1.11.1 version for python 3.5 somewhere on my disk.
From my testing i can tell that it breaks once i use numpy 1.11.3 or higher. 1.11.1 works fine. Therefore I assume that some changes happened either in numpy between 1.11.1 and 1.11.3 which break it OR in how this kind soul creates/builds his wheels. So I'm going to use python 3.5 for now as i do not have numpy 1.11.1+mkl for python 3.6.
Yours sincerely
I am trying to use my Leap motion in Python 3.4, but I cant even get import Leap to work. The python file I am trying to run is on my desktop, along with all the library files (Leap.py, LeapPython.pyd, Leap.dll, and Leap.lib). Whenever I try to run import Leap in my code, the program just throws this:
ImportError: DLL load failed: The specified module could not be found.
I'm not sure what DLL its talking about, I already tried putting msvcp120.dll and msvcr120.dll in the same directory.
I am using Leap Motion SDK Version V2.3.1.31549 on a 64 bit Windows 10 with the 32 bit version of Python 3.4
All help is appreciated.
Thank You!
The Leap Motion SDK only supports Python 2.7.
Some people have reported success using SWIG to regenerate the Python wrapper for Python 3 (the SWIG .i file is included in the SDK). You could also use the LeapC library to to create a Ctypes-based wrapper, which could support multiple versions of Python.
Some people seems to be able to use QtMultimedia with PyQt5.
according to old stackoverflow posts, it was not included with PyQt5 so
what's the way to get it together?
I'm using linux (ubuntu 14.04) and PyQt5 is already installed.
No, QtMultimedia is very much alive and well in PyQt5. Please see the Qt Documentation.
from PyQt5.QtMultimedia import {See Partial List Below}
Partial List of QtMultimedia Imports
QAudioEncoderSettings
QCamera
QCameraImageCapture
QImageEncoderSettings
QMediaMetaData
QMediaRecorder
QMultimedia
QVideoEncoderSettings
In Fact, if you look at the examples directory in the PyQt5 source, you will find a couple of examples including a video player, web camera application, music player etc. #baoboa, who isn't Phil Thompson from Riverbank Computing has added the source to Github which you can find here: https://github.com/baoboa/pyqt5/tree/master/examples/multimediawidgets