qmlglsink plugin installation problem

[riteshSTPL]

I am using Gstreamer 1.8.3 on Ubuntu 16.04 with Qt 5.5.1. and qt-gstreamer 1.2.0.
I want to use qmlglsink to preview gstreamer video on QML surface.

I follwed below commands to install qmlglsink plugin
git clone https://github.com/GStreamer/gst-plugins-bad
cd gst-plugins-bad
git checkout 1.8.3
./autogen.sh
./configure --prefix=/usr/local/
make
make install

gst-inspect-1.0 qmlglsink
No such element or plugin 'qmlglsink'

But still i am not able to get this plugin.

[Matthew Waters]

On 16/09/16 20:33, riteshSTPL wrote:

> I am using Gstreamer 1.8.3 on Ubuntu 16.04 with Qt 5.5.1. and qt-gstreamer
> 1.2.0.
> I want to use *qmlglsink* to preview gstreamer video on QML surface.
>
> I follwed below commands to install qmlglsink plugin
> git clone https://github.com/GStreamer/gst-plugins-bad
> cd gst-plugins-bad
> git checkout 1.8.3
> ./autogen.sh
> ./configure --prefix=/usr/local/
> make
> make install
>
> gst-inspect-1.0 gmlglsink
> No such element or plugin 'gmlglsink'
>
> But still i am not able to get this plugin.

1. Did the ./configure output say it was going to build the qt plugin?
2. Do you have GST_PLUGIN_PATH pointing to /usr/local/lib/gstreamer-1.0 ?
3. What happens when you run gst-inspect-1.0 on the plugin file directly?
e.g gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so


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[riteshSTPL]

1. Did the ./configure output say it was going to build the qt plugin?
./configure output says qt under this
configure: *** Plug-ins with dependencies that will be built:
    bz2
    dash
    decklink
    dtls
    dvb
    fbdevsink
    gl
    gtk
    hls
    qt
    shm
    smoothstreaming
    vcdsrc
    wayland

2. Do you have GST_PLUGIN_PATH pointing to /usr/local/lib/gstreamer-1.0 ?
I think no. because "echo $GST_PLUGIN_PATH" output Blank

3. What happens when you run gst-inspect-1.0 on the plugin file directly?
e.g gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
Plugin Details:
  Name                     qt
  Description              Qt gl plugin
  Filename                 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
  Version                  1.8.3
  License                  LGPL
  Source module            gst-plugins-bad
  Source release date      2016-08-19
  Binary package           GStreamer Bad Plug-ins source release
  Origin URL               Unknown package origin

  qmlglsink: Qt Video Sink

  1 features:
  +-- 1 elements

So i think its problem in PATH, Right?
So Whats the default location where gstreamer plugin installed? I think its not /usr/local, right?
So what should be the .configure command argument?

[riteshSTPL]

1. Did the ./configure output say it was going to build the qt plugin?
./configure output says qt under this
configure: *** Plug-ins with dependencies that will be built:
        bz2
        dash
        decklink
        dtls
        dvb
        fbdevsink
        gl
        gtk
        hls
        qt
        shm
        smoothstreaming
        vcdsrc
        wayland

2. Do you have GST_PLUGIN_PATH pointing to /usr/local/lib/gstreamer-1.0 ?
I think no. because "echo $GST_PLUGIN_PATH" output Blank

3. What happens when you run gst-inspect-1.0 on the plugin file directly?
e.g gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
Plugin Details:
   Name                     qt
   Description              Qt gl plugin
   Filename                 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
   Version                  1.8.3
   License                  LGPL
   Source module            gst-plugins-bad
   Source release date      2016-08-19
   Binary package           GStreamer Bad Plug-ins source release
   Origin URL               Unknown package origin

   qmlglsink: Qt Video Sink

   1 features:
   +-- 1 elements

So i think its problem in PATH, Right?
So Whats the default location where gstreamer plugin installed? I think its not /usr/local, right?
So what should be the .configure command argument?


On Friday 16 September 2016 06:00 PM, Matthew Waters wrote:

> On 16/09/16 20:33, riteshSTPL wrote:
>> I am using Gstreamer 1.8.3 on Ubuntu 16.04 with Qt 5.5.1. and qt-gstreamer
>> 1.2.0.
>> I want to use *qmlglsink* to preview gstreamer video on QML surface.
>>
>> I follwed below commands to install qmlglsink plugin
>> git clone https://github.com/GStreamer/gst-plugins-bad
>> cd gst-plugins-bad
>> git checkout 1.8.3
>> ./autogen.sh
>> ./configure --prefix=/usr/local/
>> make
>> make install
>>
>> gst-inspect-1.0 gmlglsink
>> No such element or plugin 'gmlglsink'
>>
>> But still i am not able to get this plugin.
> 1. Did the ./configure output say it was going to build the qt plugin?
> 2. Do you have GST_PLUGIN_PATH pointing to /usr/local/lib/gstreamer-1.0 ?
> 3. What happens when you run gst-inspect-1.0 on the plugin file directly?
> e.g gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
>

--

__________________________________________________________________
Thanks & Regards,
Ritesh Panchal | Embedded Software Engineer
Syntrons Technologies Pvt. Ltd.
M: [phone]

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[Matthew Waters]

On 16/09/16 22:38, Ritesh Panchal wrote:

> 1. Did the ./configure output say it was going to build the qt plugin?
> ./configure output says qt under this
> configure: *** Plug-ins with dependencies that will be built:
>     bz2
>     dash
>     decklink
>     dtls
>     dvb
>     fbdevsink
>     gl
>     gtk
>     hls
>     qt
>     shm
>     smoothstreaming
>     vcdsrc
>     wayland

Good.

> 2. Do you have GST_PLUGIN_PATH pointing to /usr/local/lib/gstreamer-1.0 ?
> I think no. because "echo $GST_PLUGIN_PATH" output Blank

Right, so this is your issue.  By default only system plugins are loaded
which are in /usr, not /usr/local.  You need to add
/usr/local/lib/gstreamer-1.0 to GST_PLUGIN_PATH for GStreamer to
automatically find the qt plugin.

> 3. What happens when you run gst-inspect-1.0 on the plugin file directly?
> e.g gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
> gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
> Plugin Details:
>   Name                     qt
>   Description              Qt gl plugin
>   Filename                 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so
>   Version                  1.8.3
>   License                  LGPL
>   Source module            gst-plugins-bad
>   Source release date      2016-08-19
>   Binary package           GStreamer Bad Plug-ins source release
>   Origin URL               Unknown package origin
>
>   qmlglsink: Qt Video Sink
>
>   1 features:
>   +-- 1 elements

Looks good.

> So i think its problem in PATH, Right?
> So Whats the default location where gstreamer plugin installed? I
> think its not /usr/local, right?
> So what should be the .configure command argument?

It's not a configure argument but rather an environment setup.  When
building your own GStreamer packages you also need to setup the
necessary environment for GStreamer to find them correctly.  If you're
building the same version as you already have installed and only
attempting to complement the installed packages, you can usually get
away with just adding paths to GST_PLUGIN_PATH.  Anything more
complicated/involved requires setting up a full prefix/uninstalled
environment.  e.g.
https://arunraghavan.net/2014/07/quick-start-guide-to-gst-uninstalled-1-x/
is a quick guide for setting up an uninstalled setup in your home
directory (or anywhere else) that can also be used for stable branches
(1.6, 1.8) with some slight modifications.

Cheers
-Matt

> On Friday 16 September 2016 06:00 PM, Matthew Waters wrote:
>> On 16/09/16 20:33, riteshSTPL wrote:
>>> I am using Gstreamer 1.8.3 on Ubuntu 16.04 with Qt 5.5.1. and
>>> qt-gstreamer
>>> 1.2.0.
>>> I want to use *qmlglsink* to preview gstreamer video on QML surface.
>>>
>>> I follwed below commands to install qmlglsink plugin
>>> git clone https://github.com/GStreamer/gst-plugins-bad
>>> cd gst-plugins-bad
>>> git checkout 1.8.3
>>> ./autogen.sh
>>> ./configure --prefix=/usr/local/
>>> make
>>> make install
>>>
>>> gst-inspect-1.0 gmlglsink
>>> No such element or plugin 'gmlglsink'
>>>
>>> But still i am not able to get this plugin.
>> 1. Did the ./configure output say it was going to build the qt plugin?
>> 2. Do you have GST_PLUGIN_PATH pointing to
>> /usr/local/lib/gstreamer-1.0 ?
>> 3. What happens when you run gst-inspect-1.0 on the plugin file
>> directly?
>> e.g gst-inspect-1.0 /usr/local/lib/gstreamer-1.0/libgstqmlgl.so

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[riteshSTPL]

Hello Matthew,

Thanks for the Reply.

I can able to get qmlglsink plugins by following steps

git clone https://github.com/GStreamer/gst-plugins-bad
cd gst-plugins-bad
git checkout 1.8.3
export GST_PLUGIN_PATH=/usr/lib/gstreamer-1.0/
./autogen.sh
make
make install

gst-inspect-1.0 qmlglsink
Factory Details:
  Rank                     none (0)
  Long-name                Qt Video Sink
  Klass                    Sink/Video
  Description              A video sink the renders to a QQuickItem
  Author                   Matthew Waters <[e-mail]>

Plugin Details:
  Name                     qt
  Description              Qt gl plugin
  Filename                 /usr/lib/gstreamer-1.0/libgstqmlgl.so
  Version                  1.8.3
  License                  LGPL
  Source module            gst-plugins-bad
  Source release date      2016-08-19
  Binary package           GStreamer Bad Plug-ins source release
  Origin URL               Unknown package origin

GObject
 +----GInitiallyUnowned
       +----GstObject
             +----GstElement
                   +----GstBaseSink
                         +----GstVideoSink
                               +----GstQtSink

But if i try to build "gst-plugins-bad/tests/examples/qt/qml" project. The build got successful. But Running the application gives me following error.

ERROR:../qml/main.cpp:52:int main(int, char**): assertion failed: (src && glupload && sink)

If i comment out

g_assert (src && glupload && sink);

, And try to run app i got following error.

QQmlApplicationEngine failed to load component
qrc:/main.qml:7 module "org.freedesktop.gstreamer.GLVideoItem" is not installed

ASSERT: "!isEmpty()" in file /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h, line 316
The program has unexpectedly finished.

So how to solve this error?

[Matthew Waters]

On 17/09/16 15:50, riteshSTPL wrote:
> Hello Matthew,
>
> Thanks for the Reply.
>
> I can able to get qmlglsink plugins by following steps
> git clone https://github.com/GStreamer/gst-plugins-bad
> cd gst-plugins-bad
> git checkout 1.8.3
> export GST_PLUGIN_PATH=/usr/lib/gstreamer-1.0/

GST_PLUGIN_PATH needs to be set while *running* the program to the place
where the plugins are, not while building the plugins.  It's not used
while building.

> ./autogen.sh
> make
> make install
>
>
> gst-inspect-1.0 qmlglsink
> Factory Details:
>   Rank                     none (0)
>   Long-name                Qt Video Sink
>   Klass                    Sink/Video
>   Description              A video sink the renders to a QQuickItem
>   Author                   Matthew Waters <[hidden email]>
>
> Plugin Details:
>   Name                     qt
>   Description              Qt gl plugin
>   Filename                 /usr/lib/gstreamer-1.0/libgstqmlgl.so
>   Version                  1.8.3
>   License                  LGPL
>   Source module            gst-plugins-bad
>   Source release date      2016-08-19
>   Binary package           GStreamer Bad Plug-ins source release
>   Origin URL               Unknown package origin
>
> GObject
>  +----GInitiallyUnowned
>        +----GstObject
>              +----GstElement
>                    +----GstBaseSink
>                          +----GstVideoSink
>                                +----GstQtSink
>
>
> But if i try to build "gst-plugins-bad/tests/examples/qt/qml" project. The
> build got successful. But Running the application gives me following error.
> ERROR:../qml/main.cpp:52:int main(int, char**): assertion failed: (src &&
> glupload && sink)
>
>
> If i comment out
> g_assert (src && glupload && sink);
> , And try to run app i got following error.
> QQmlApplicationEngine failed to load component
> qrc:/main.qml:7 module "org.freedesktop.gstreamer.GLVideoItem" is not
> installed
>
> ASSERT: "!isEmpty()" in file
> /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h, line 316
> The program has unexpectedly finished.
>
>
> So how to solve this error?
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble.com/qmlglsink-plugin-installation-problem-tp4679619p4679638.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
>

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