Enable Gstreamer in Qt5 configuration
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Hi and welcome to devnet,
Did you install the gstreamer development packages ?
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wrote on 15 Sept 2014, 14:54 last edited by
yes I have installed all packages which are listed on the "wiki page":http://qt-project.org/wiki/Native_Build_of_Qt5_on_a_Raspberry_Pi (first code section line 3). For gstreamer this are the following:
@libgstreamer0.10-dev
libgstreamer-plugins-base0.10-dev
gstreamer-tools
gstreamer0.10-plugins-good
gstreamer0.10-plugins-bad@gstreamer itselfs works:
@gst-launch-0.10 videotestsrc ! video/x-raw-rgb, framerate=25/1, width=640, height=360 ! ffmpegcolorspace ! fbdevsink@ -
Did you do that on your Raspberry Pi ?
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wrote on 15 Sept 2014, 19:25 last edited by
yes, all direct on the pi, not cross compiling
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Do you have your Pi root filesystem accessible on your desktop computer ?
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wrote on 15 Sept 2014, 20:52 last edited by
yes i just had to put the Raspi SD Card in the Computer and mount it
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What parameters did you pass to configure ?
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wrote on 15 Sept 2014, 22:33 last edited by
I copied it from the wiki page: "http://qt-project.org/wiki/Native_Build_of_Qt5_on_a_Raspberry_Pi":http://qt-project.org/wiki/Native_Build_of_Qt5_on_a_Raspberry_Pi
@./configure -v -opengl es2 -device linux-rasp-pi-g++ -device-option CROSS_COMPILE=/usr/bin/ -opensource -confirm-license -optimized-qmake -reduce-exports -release -qt-pcre -make libs -prefix /usr/local/qt5 &> output@
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Ok… I missed it the first time… you are following the instructions to build Qt ON the raspberry pi but you are trying to cross-compile it from your desktop…
"This":https://qt-project.org/wiki/RaspberryPi_Beginners_guide guid shows how to cross-compile it
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wrote on 15 Sept 2014, 23:05 last edited by
No, I'm building Qt direct on the Raspberry, like on the wiki page.
Sorry if I understand your question wrong when you asked if I had the filesystem accessible on my desktop computer. At the moment I dont have it on my desktop pc, I wanted to say that I could easily access it if needed for the solution by just insert the Raspberry Pi SD Card to my desktop computer. (Did you mean if I had an image of the filesystem on my desktop computer for cross compiling? => No)
If your thinking of the CROSS_COMPILE option by calling configure: This is sayed on the wiki page:
bq. In order to properly run configure for Qt5 on the Raspberry Pi, you need to point the CROSS_COMPILE variable to the native compiler located at /usr/bin/g++. The CROSS_COMPILE parameter is the path to the compiler (without the g++). If you do not do this properly it will complain that it is not being cross compiled.
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My bad, I was thinking about the SYSROOT parameter that was missing. But in your case it's unrelated.
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wrote on 7 Oct 2014, 11:21 last edited by
Found the solution in the compile logfiles. The configure script does not search for gstreamer anymore. Qt searches for gstreamer during compile of qt multimedia plugin in. But the compile step needs pkg-config to be set (see above) to find gstreamer.
Now I can play videos, but very very slow, so I don't know if additional steps are needed for hardware acceleration.
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IIRC, you have to look for "gst omx raspberry pi"
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wrote on 13 Oct 2014, 13:59 last edited by
gst-omx is the rigth track but it doesn't compile anymore.
I started with this: http://raspberrypi.stackexchange.com/questions/528/how-can-i-install-gstreamer-gst-omx
This post is 2 years old so the git repository moved here: http://cgit.freedesktop.org/gstreamer/gst-omx/ and the configure call need aditional parameters, see here: http://gstreamer-devel.966125.n4.nabble.com/Pb-with-omx-compilation-td4668631.html#a4668934But make throws still errors like "unknown type name 'GStaticMutex'". With google i found presumtions that this is because GStaticMutex, etc. was deprecated in some librarys.
The gst-omx development of the 0.10 branch stopped a year ago. So I think this errors are fixed in current version but the current version needs gstreamer-1.x and Qt5 wants gstreamer.0.10 :-(
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Depending on your needs you could use QtGStreamer in between