Disable xv output in wxMediaCtrl

[Azrael]

Is there a way to disable xv output in wxMediaCtrl ? Or a way to change it somehow?
https://leo.unglaub.at/howto/openbsd/pa ... xv-output/
I always get this gstreamer backend error from the Load function in wxMediaCtrl. In parole there is an option to change it. After the change it works. I was wondering if it is possible to do the same in wxMediaCtrl.
Xv output has something to do with video output, no? I only need the audio part.

[ONEEYEMAN]

Hi,
Is there an option in Gstreamer to disable it?
If not - you will need to modify the wxWidgets, as I don't think there is such a options available.

Where is the error coming from? Can you do a backtrace?

Thank you.

[Azrael]

Hi ONEEYEMAN,
Thank you for replying.

Where is the error coming from? Can you do a backtrace?

I don't know how to do a backtrace, i'm really new to all of this. However I really want to make things work .
I think it is a gstreamer error. So i searched on the internet for ways of checking if I have the necessary plugins installed.
I found this:
https://gstreamer.freedesktop.org/docum ... using.html
wxWidgets 3.0.2 uses gstreamer 0.10 not 1.0, right ? So I tried one of the commands in the terminal :

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 gst-launch-1.0 filesrc location=Music/DINOSAUR.mp3 ! decodebin ! audioconvert ! pulsesink 

It plays the song

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gst-launch-0.10 filesrc location=Music/DINOSAUR.mp3 ! decodebin ! audioconvert ! pulsesink 

I get this output:

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Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Missing element: MPEG-1 Layer 3 (MP3) decoder
ERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpegAudioParse:mpegaudioparse0: GStreamer encountered a general stream error.
Additional debug info:
gstbaseparse.c(2890): gst_base_parse_loop (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpegAudioParse:mpegaudioparse0:
streaming stopped, reason not-linked
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

Obviously I'm missing a plugin for decoding mp3 in gstreamer 0.10. A plugin I have in gstreamer 1.0

I installed:
http://www.linuxfromscratch.org/blfs/vi ... -ugly.html
http://www.linuxfromscratch.org/blfs/vi ... s-bad.html

Nothing changed.

[ONEEYEMAN]

Hi,
It may even be using gstreamer 0.8.
Did you install wx from the repository or you compiled it yourself? I suggest you download the 3.0.2 source code, compile it yourself, build "media" sample and try to play this file.

Thank you.

[Azrael]

Hi,

Did you install wx from the repository or you compiled it yourself?

I installed it from the repository. I'll try to build the sources myself then.
Sorry for the basic question but why would something change ?

[ONEEYEMAN]

Hi,
Before building do this:

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cd wxWidgets-3.0.2
mkdir buildGTK
cd buildGTK
../configure --help | grep media

Check its output to see which Gstreamer version will be used.

When building supply "--enable-debug --enable-debug_gdb" to configure. You will build the debug version of the library which will be easier to follow in debugger.

Thank you.

[Azrael]

It means that I have to

• delete wxwidgets
  download the source files
  before building, check which gstreamer version it is going to use
  enable debug

Right?
I'll update later

Thank you for helping me. I really appreciate it

[ONEEYEMAN]

Hi,
You don't need to delete the install.
You source tree will stay local. You will not install it.

Thank you.

[Azrael]

Okay then. Thank you!

[Azrael]

I was not really expecting the output I got:

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--enable-mediactrl  use wxMediaCtrl class

That's it.
I also searched for wxMediaCtrl :

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../configure --help | grep wxMediaCtrl

And I got this output:

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--enable-mediactrl  use wxMediaCtrl class
--enable gstreamer8 Force GStreamer 0.8 instead of 0.10 with the wxMediaCtrl class on unix

I guess it uses gstreamer 0.10 by default for wxWidgets 3.0.2

[ONEEYEMAN]

OK, then it is 0.10.
BUt it actually means that you are still missing the plugin for GStreamer.

Thank you.

EDIT:

I would still try to build the library with the default setting and then media sample and see if this is fixed.

[Azrael]

The documentation says:

wxMEDIABACKEND_GSTREAMER, Use GStreamer. Unix Only. Requires GStreamer 0.8 along with at the very least the xvimagesink, xoverlay, and gst-play modules of gstreamer to function. You need the correct modules to play the relevant files, for example the mad module to play mp3s, etc

Now, I have those modules for gstreamer 1.0 but not for gstreamer 0.10. Mad module is from the ugly plugins but there isn't an ugly plugin for 0.10.
I don't know what else to do

[ONEEYEMAN]

Hi,
IIRC, GStreamer 1.0 support was put into wx 3.1.
Try to get 3.1 sources and run its configure help as I showed.

If it has 1.0 support - try to build it and see if that solved the problem.

Thank you.

[Azrael]

Code: Select all

--enable-mediactrl  use wxMediaCtrl class

there isn't anything about gstreamer. I tried:
grep media
grep wxMediaCtrl
grep gstreamer
grep 1.0
It seems like the only difference is that they don't have the "force gstreamer 0.8" option anymore.

What happens if I have both libraries (3.0.2 and 3.1.0) on the computer? Which one will be used?

[ONEEYEMAN]

Hi,
You can compile 3.1 locally and don't install it.
Just try to compile and then compile the media sample to see if it works.

Just do:

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cd wxWidgets-3.1
mkdir buildGTK
cd buildGTK
../configure --enable-debug --enable-debug_gdb --enable-mediactrl
make
cd samples/media
make

If it does - my guess would be that there is an incompatibility between 1.0 plugin and 0.1 plugin that wx needed.

Thank you.