QtMultimedia issue, missing GStreamer after configure

[Pablo J. Rogina]

@matio said in QtMultimedia issue, missing GStreamer after configure:

You saved my life !

Were you finally able to cross-compile Qt Multimedia with GStreamer support? If so please don't forget to mark your post as such. Thanks

[CKurdu]

@matio said in QtMultimedia issue, missing GStreamer after configure:

VM

Hi Matio,
Can you play videos using Qt Multimedia with no problem? Because I didn't, it plays videos but a problematic way. I have raspberry pi 3 b+ and I use qt vlc library to work around this problem.

[matio]

@CKurdu

Hi,

I have not tested it for now, I just managed to compile. It took a few hours...
But your comment seems to sadly confirm what I read here (last section of the page):

https://wiki.qt.io/RaspberryPi2EGLFS?fbclid=IwAR14XF1aB41xqTVaZVKE_eddyezT1tSZcgM-zPmvyDIyEvUgvTSMPyZUT8A

The issue seems to be relative to GStream and not solved yet.

I'll try as soon as possible and keep you informed about this.

[matio]

@CKurdu

Hi,

Finaly, I can't even play videos. I can only play sounds.

When I compile and execute I have this mesasge:

CRITICAL **: gst_video_decoder_set_latency: assertion 'GST_CLOCK_TIME_IS_VALID (min_latency)' failed

So I will use libvlc unless you know what this error means.

[CKurdu]

@matio
I am using vlc-qt for my current project. OMXPlayer may be another solution with QProcess but I haven't tried it yet.
Which raspberry are you using?

[matio]

@CKurdu

Hi, sorry for the late answer.

I had issues installing vlc-qt, but suceededly install libvlc and it was what I needed finaly.

I'm still interested in vlc-qt if you can help me.

I'm using RaspberryPi 3B+

[CKurdu]

@matio
Hi, I didn't install vlc-qt , I installed vlc and compiled vlc-qt library. My project is not qml based. I am using a widget-based qt app and at this time I am successful.

I can try to help you as much as I can.

[matio]

@CKurdu
Hi!
Thank you for your help.

I followed the instructions of this page:

https://github.com/vlc-qt/vlc-qt/blob/master/BUILDING.md

But during the make step, at 93% of the compilation I have an error:

/usr/lib/arm-linux-gnueabihf/qt5/bin/uic: relocation error: /usr/lib/arm-linux-gnueabihf/qt5/bin/uic: symbol qt_qhash_seed, version Qt_5 not defined in file libQt5Core.so.5 with link time reference
AUTOUIC: error: process for ui_Player.h needed by
 "/home/pi/vlc-qt/vlc-qt/tests/widgets/ui/Player.cpp"
failed:
/usr/lib/arm-linux-gnueabihf/qt5/bin/uic: relocation error: /usr/lib/arm-linux-gnueabihf/qt5/bin/uic: symbol qt_qhash_seed, version Qt_5 not defined in file libQt5Core.so.5 with link time reference

uic failed...
tests/widgets/CMakeFiles/Test_WidgetsPlayer_automoc.dir/build.make:60 : la recette pour la cible « tests/widgets/CMakeFiles/Test_WidgetsPlayer_automoc » a échouée
make[2]: *** [tests/widgets/CMakeFiles/Test_WidgetsPlayer_automoc] Erreur 1
make[2] : on quitte le répertoire « /home/pi/vlc-qt/vlc-qt/build »
CMakeFiles/Makefile2:954 : la recette pour la cible « tests/widgets/CMakeFiles/Test_WidgetsPlayer_automoc.dir/all » a échouée
make[1]: *** [tests/widgets/CMakeFiles/Test_WidgetsPlayer_automoc.dir/all] Erreur 2
make[1] : on quitte le répertoire « /home/pi/vlc-qt/vlc-qt/build »
Makefile:141 : la recette pour la cible « all » a échouée
make: *** [all] Erreur 2

Do you have an idea of what happened ?

[getgo]

@CKurdu Hi, can your try change the amount of memory made for the GPU to 256? it's in the

raspi-config -> Advance option -> Memory split -> 256

because I stuck to compiling gstreamer

[CKurdu]

@matio

I compiled vlc-qt on raspbian os. Also don't use "make -j8" command just use "make" or may be "make -j4"

[matio]

@CKurdu

I compiled it on raspbian too and I haven't used the -j option.

I tried again today but I still have the same error.

The issue is surely related to this message:

"the version Qt_5 not defined in file libQt5Core.so.5"

But I don't know what this means and how to solve it.

[CKurdu]

Which version of Qt did you install and how?