libVlc in qml with QtQuick2.0

[topix93]

hi, i'm using qt5.2 and vlc 2.1.3 and i need to show a stream rtsp in a qml scene using libvlc. but i don't know how to do that, can anyone help me?

i already made a QWidget that shows me the stream, but now i need to make the same thing in qtquick. it is possible?

[RSATom]

I started new library for it some time ago, but it's still unfinished: https://github.com/RSATom/QmlVlc
This library used in WebChimera: http://rsatom.github.io/WebChimera/

[jech]

I would be interested in this too. It seems that embedding classic widget to QML is not possible anymore: http://stackoverflow.com/questions/1301 ... ect-in-qml

If you find a way how to do play a video in QML using libVLC, please let me know. Thanks a lot in advance.

[RSATom]

If you couldn't use QmlVlc by some reason, you could try vlc-qt, which has experimental support of qml.

[jech]

Great. In your pfirst post you've written that it is not finished yet. So I thought that QmlVlc is not ready to use.

Is there an example on how it can be used? Unfortunately I'm really a beginner in C/C++ and I need good documentation and examples to be able to create something that works.

[RSATom]

It's unfinished, but it's working (you can look WebChimera plugin, it has simple demo) but for beginner it could be hard, yes. And there are no documentation yet...

[RSATom]

I'll try to do standalone demo with QmlVlc - it will be useful to me too.

[jech]

RSATom> Great I'm looking forward to it. Thanks a lot for your work.

[topix93]

i have tried to use vlc-qt and it's working, but unfortunately there is a memory leak on stop and play.. i tried to find where was the leak, but i was not able to find it... i've already reported the bug but with no solution..

i would like to try the wechimera plugin, maybe it's better

[RSATom]

I hope to finish QmlVlc's sample on this weekend. Maybe earlier, I almost finished it. But I'm afraid it will be compatible only with Visual Studio 2012 or newer, since I have to use std::thread to avoid dependency from boost. But it will be easy to make some sort of config file, to switch back to boost if it will be needed.

[RSATom]

Simple demo is ready: https://github.com/RSATom/QmlVlcDemo
You will need Qt Creator and QT 5.2 to build this sample

[topix93]

it works great.. but it crashes when i call vlcPlayer.stop()... maybe is becouse i'm using ubuntu instead of windows/visual studio.. how can i solve this issue?

[RSATom]

hm... I didn't try it with linux can you give me backtrace/call stack?

[RSATom]

Maybe I know the reason.
look https://github.com/RSATom/ya-libvlc-wra ... r.cpp#L100 and try replace

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std::thread( libvlc_media_player_stop, _mp );

with

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std::thread th( libvlc_media_player_stop, _mp ); th.detach();

[topix93]

yeah now it work...

i add this code in basic_2.qml:

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function stopAndStart(){ vlcPlayer.stop() vlcPlayer.play(vlcPlayer.mrl) } Timer { id: myTimer interval: 10000 //ms running: true repeat: true onTriggered: stopAndStart() }

but the videosurface freeze and it does not refresh.. can you help me?

[RSATom]

I can try little later (within 3-5 hours)

[RSATom]

I have some doubt vlcPlayer.mrl returns correct value. I didn't check it yet.

[RSATom]

btw, you could try

Code: Select all

vlcPlayer.stop(); vlcPlayer.play();

it should work same

[topix93]

i tried but the problem persists

[RSATom]

ok, I'll check today.

[RSATom]

It was a bug in QmlVlc. It's fixed. Please update your local repo.

[topix93]

thank you very much, now it works really great

[RSATom]

I sure will be another bugs If you will find some, please create issue on github, thanks.

[kfieldi5]

Hello RSATom

First of all, thanks a lot for making a library to use libvlc via QML. I am working on a project in Qt widgets that I have just been told may need to go to mobile so am now porting to QML and this is a life-saver.

I am quite novice when it comes to C++ and am not sure how to get your QmlVlcDemo running. I have both the demo and the actual lib cloned into my working directory but I get a QmlVlc.h not found? I know I need to link the library but I see no makefile in the library (QmlVlc project on your github).

Any help would be much appreciated, I'm still fairly new in the Qt and C++ world.

Thanks,
Kevin

[RSATom]

You should just add all files from qmlvlc to your project and build it altogether.