QtMobility-no service found for - "com.nokia.qt.mediaplayer - qt-mobility

I have installed QtMobility successfully but when I run my programs, the UI comes up but the media (audio & video) does not play.
This is the error I get through command prompt as well as QtCreator:
defaultServiceProvider::requestService(): no service found for - "com.nokia.qt.mediaplayer"
I got the same error when using QtSDK 4.8.1 & 4.7.2
My platform is Ubuntu 10.04 and gstreamer 0.10.6 is also installed on my platform
I had posted the issue in several forums but got no response.
Kindly suggest a solution and help resolve issues.
These are the files in my QtSDK->plugin->mediaservice folder:
libqtmedia_audioengine.so
libqtmedia_v4lengine.so
Is the error related to any .so files here?

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Ld: library not found for -lcgraph (QT Application)

I am currently working on a QT application, however, I am unable to build due to this error which I am unable to resolve. I am currently using macOS Montery and have already installed xcode command line. I have tried searching online and tried many different solutions but to no avail. Any help or advice would be appreciated thank you!
If you have homebrew installed, try the following:
brew install graphviz

Rstudio not working on my Ubuntu 16 virtual machine

When I try to run Rstudio Desktop (1.4) on my virtual machine (Ubuntu 16.4), Rstudio crashes and gives the error:
ERROR:gl_surface_glx_gt.cpp(141) GLX 1.3 or later is required.
I tried to follow the instructions on this page: https://wiki.x2go.org/doku.php/wiki:development:glx-xlib-workaround, but can not get past the meson -D configuration in the Ubuntu terminal. At this point I get the error message: 'ERROR: Problem encountered: gallium-xlib conflicts with any dri driver'
I googled and tried everything that I could possibly find (similar questions as https://community.rstudio.com/t/x2go-and-rstudio/29704/2), but no success yet.
Obviously the upgrade to a higher GLX version is the cause, but I can not upgrade it.
Is anyone familiar with the error and what is actually causing it?
Any help would be greatly appreciated!
I am using R version 3.4.4

Installation of gstreamer bad plugins and opencv3.3 on Ubuntu 16.04 arm64

I have been working on some video playing/streaming pipelines for Computer Vision work on Nvidia Jetson TX2. It had Ubuntu 16.04 with latest Jetpack.
I have already installed opencv 3.3 and to test some of the pipelines, with .MP$ video files, I need h264parse plugin which is a part of gst-bad-plugins. However, when I try to install it using apt-get, it shows that following packages will be installed:
freepats gstreamer1.0-plugins-bad-faad gstreamer1.0-plugins-bad-videoparsers
libbs2b0 libde265-0 libflite1 libfluidsynth1 libgstreamer-plugins-bad1.0-0
libmimic0 libmjpegutils-2.1-0 libmms0 libmpeg2encpp-2.1-0 libmplex2-2.1-0
libofa0 libopenal-data libopenal1 libopencv-calib3d2.4v5
libopencv-contrib2.4v5 libopencv-core2.4v5 libopencv-features2d2.4v5
libopencv-flann2.4v5 libopencv-highgui2.4v5 libopencv-imgproc2.4v5
libopencv-legacy2.4v5 libopencv-ml2.4v5 libopencv-objdetect2.4v5
libopencv-video2.4v5 libsoundtouch1 libspandsp2 libsrtp0 libvo-aacenc0
libvo-amrwbenc0 libwildmidi-config libwildmidi1 libzbar0
Here it tries to install an older version of opencv and this really messes up with my current opencv (v3.3) install.
Does anyone have any idea on how should I overcome this problem. I would not want the option to just ignore all the dependencies. But somehow, if it detects the installed opencv version, that would be awesome.
Any help is appreciated.
Thanks!
I am working on Jetson Tx1 , and have problem installing opencv 3.3 in virtual environment onto it due to space issues. I tried to compile the build file from external sd card and make from there. Then Sym-link (cv2.so) file to appropriate path. Can you tell me how you were able to install opencv3.3 ??

Electron App & FFMpeg - Library not loaded

I've recently upgraded Electron to v0.37, and upon trying to start my app, I'm getting an error of the following.
dyld: Library not loaded: /usr/local/lib/libffmpeg.dylib
Referenced from: /usr/local/lib/node_modules/electron-prebuilt/dist/Electron.app/Contents/Frameworks/Electron Framework.framework/Versions/A/Electron Framework
Reason: image not found
I have ffmpeg installed on my machine via homebrew, which I installed with brew install ffmpeg . I've tried uninstalling ffmpeg and reinstalling, but haven't had any luck.
I've noticed in more recent versions of Electron, since v0.36.8 they've 'Link with ffmpeg dynamically' according to the changelog.
I should note, I'm using ffmpeg in my electron app, and specifically, im utilizing the Fluent FFMpeg node library (https://www.npmjs.com/package/fluent-ffmpeg).
Has anyone come across this same issue? Any idea on a fix?
It is an known issue in version 0.37. As a temporary workaround you can downgrade to version 0.36.

in F# on MAC OSX and Ubuntu I get an error running FSI in 4.0

I need System.Numerics in F#
EDIT I think the question is can fsi run with the 4.0 runtime and if so how do I configure it
I run "mono /bin/Fsi" in the Fsharp 4.0 dir I get the following error in both OSX 10.6.4 and Ubuntu 10.1.
I am sure I am missing a path or something
Please note the paths are different on the MAC but I got the same error
error FS0078: Unable to find the file 'System.Numerics.dll' in any of
/opt/mono-2.8/lib/mono/2.0
/home/gary/Downloads/FSharp-2.0.0.0/v4.0/bin
/home/gary/Downloads/FSharp-2.0.0.0/v4.0/bin/
On my MAcbook I copied the mono 4.0 bin dir to one of the above paths and Fsi loads but then it stops with this error.
Error FS0192: internal error: unreachable: GetGlobals
I have not tried this with the Ubuntu laptop
Any help would be appreciated.
G
Use cd /usr/lib/fsharp
then mono fsi.exe
your question brought me to search for fsi (before I could not find it)
Have you tried running sudo install_mono.sh from the F# directory? Also, I think you mean F# 2.0, right?
Make sure that your Mono is installed properly. I don't have my mac at work, so I use my Ubuntu desktop as example.
System.Numerics.dll belongs to Mono not F#. In my installation (Mono 2.8.1 and Ubuntu 10.10), that file is under the following directory
/usr/local/lib/mono/4.0/System.Numerics.dll

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