3rd Party Software

@Ranto-Tiaray-Andrianavonison Hi, You need to link to the appropriate macOS frameworks and libraries as well.

you can try: MediaPlayer{ id: playVideo source: "gst-pipeline: filesrc location=/home/root/skim-debris.mp4 ! qtdemux ! avdec_h264 ! qtvideosink" autoLoad: true autoPlay: true playbackRate: 1.0 loops: 10 } VideoOutput { anchors.fill: parent source: playVideo }

thanks @artwaw

Hi and welcome to devnet, There's nothing particular in Qt for that. You should use the C++ API provided by Microsoft to implement the communication you want.

@ronaldon You cannot link mixing compilers. MinGW produces .a libraries. MSVC produces .lib libraries. You need to pick one of the two compilers and compile both your own code and third-party code with the same compiler toolchain.

Hi, Did you ensure that you were using OpenCV and Qt built with the same compiler ?

Also note that Qt Creator gains some direct support for vcpkg only in the next upcoming release: https://www.qt.io/blog/qt-creator-cmake-package-manager-auto-setup

Hi, Where is it installed in your system ? Did you point CMake to your Qt's cmake files ?

I slightly tested it, and the library seems to work as intended. You will have to refactor tutorial examples into C++, as gstreamer is written in C. Again, here are the installation steps for gstreamer 1.18.3 for Qt 5.15 on win7 64 bit with mingw 8.1: Download and install gstreamer-1.0-devel-mingw-x86_64-1.18.3.msi and gstreamer-1.0-mingw-x86_64-1.18.3.msi. Add INCLUDEPATH += "C:\gstreamer\1.0\mingw_x86_64\include\gstreamer-1.0" INCLUDEPATH += "C:\gstreamer\1.0\mingw_x86_64\include\glib-2.0" INCLUDEPATH += "C:\gstreamer\1.0\mingw_x86_64\lib\glib-2.0\include" LIBS += "C:/gstreamer/1.0/mingw_x86_64/lib/gstreamer-1.0.lib" to your qmake (.pro) file. Add the C:\gstreamer\1.0\mingw_x86_64\bin path to the projects > Run > Environment > PATH variable in qt creator. That looks like a working setup for me. Thanks to @SGaist for helping solving this problem for me, all props to him :). Thank you very much.

@artwaw Thanks for the tip! In this particular case, I think the problem was related to the version because it started to work after updating to OpenSSL 1.1.1j instead of the version that comes with Qt 5.15.0 (which I think is OpenSSL 1.1.1g but I'm not sure now). I compiled the libraries myself following the official guide which uses MSVC: https://github.com/openssl/openssl/blob/master/NOTES-WINDOWS.md Anyway, your suggestion makes sense and it is definitely something to try as well if anyone has problems.

@jsulm said in QWT problem installing as a plugin in CT - doesn't show up.: @stdave said in QWT problem installing as a plugin in CT - doesn't show up.: but how do I match my QWT compiile to my QT Version? Install Qt 5.15.2 (MSVC 2019, 64 Bit) and build QWT with that Qt version and MSVC2019. I have followed your suggestion here. The problem I appear to be having is that qmake creates a Makefile that compiles (and installs) fine with mingw32-make, but gives a couple errors when compiled with nmake or with jom (when executed from the shell within MSVC2019.) The ./src/Makefile.Release and ./src/Makefile.Debug files both have these errors at like 14 and 15; CC = @echo compiling $< && gcc CXX = @echo compiling $< && g++ Simply removing the "$<" gets the compiler (both of them) on their way. There appears to be another problem further into the compile, which I believe is caused by another error in the Makefile which causes this error message; moc qwt_dyngrid_layout.h The filename, directory name, or volume label syntax is incorrect. jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_dyngrid_layout.cpp] Error 1 moc qwt_magnifier.h The filename, directory name, or volume label syntax is incorrect. moc qwt_panner.h jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_magnifier.cpp] Error 1 The filename, directory name, or volume label syntax is incorrect. moc qwt_picker.h The filename, directory name, or volume label syntax is incorrect. moc qwt_text_label.h jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_panner.cpp] Error 1 The filename, directory name, or volume label syntax is incorrect. jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_picker.cpp] Error 1 jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_text_label.cpp] Error 1 jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile [release-all] Error 2 C:\Qt\Tools\QtCreator\bin\jom.exe -f Makefile.Debug all The filename, directory name, or volume label syntax is incorrect. jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Debug [moc\moc_qwt_dyngrid_layout.cpp] Error 1 The filename, directory name, or volume label syntax is incorrect. The filename, directory name, or volume label syntax is incorrect. jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Debug [moc\moc_qwt_magnifier.cpp] Error 1 jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Debug [moc\moc_qwt_panner.cpp] Error 1 moc qwt_dyngrid_layout.h moc qwt_magnifier.h moc qwt_panner.h moc qwt_picker.h (above error is actually from jom becuase it outputs more info, but both compilers seems to get hung up in the same spot. The characters "$<" that I noted caused the first error output mentioned; NMAKE : warning U4006: special macro undefined : '$<' which allowed smooth compiling when removed - I noticed this as a problem others were also having with the same strange characters in their Makefile when encountering the nmake or jom error sited. Right now I am wondering about either just correcting the errors in the Makefiles, or getting a different qmake which may hopefully produce problem free Makefiles.

@Pablo-J-Rogina This one