wxMediaCtrl on Linux

[Steve_Bz]

Hi Guys,

I have been developing a cross-platform multi-media medical application in
wxWidgets.  All the original development was done in Windows and I have just
ported to Kubuntu 9.10.  One of the main components is wxMediaCtrl which is
and embedded mediaplayer frontend which uses MS Media Player backend on
Windows or GStreamer on Linux.  

I've definitely got GStreamer installed because other applications run using
it. I can even write pieces of code in Perl which call Gstreamer directly
but I've not got
wxMediaCtrl running yet. I'm getting error "Got an invalid playbin (error
0:Success)".  So what am I missing here?

I have:

- Kubuntu 9:10
- wxPerl 0.91-1
- GStreamer (libgstreamer-plugins-base0.10-0 - 0.10.25-2ubunbtu1 (amd64),
libgstreamer0.10-0 - 0.10.25 (amd64), bluez-gstreamer - 4.51-0ubantu2
(amd64)).

However, there are 54 other GStreamer packages/modules that aren't
installed, and maybe I'm just missing one or two.

What are your thoughts?

Thanks and regards

Steve



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[Tim-Philipp Müller-2]

On Fri, 2009-11-06 at 10:58 -0200, Steve Cookson wrote:

Hi,

> I have been developing a cross-platform multi-media medical application in
> wxWidgets.  All the original development was done in Windows and I have just
> ported to Kubuntu 9.10.  One of the main components is wxMediaCtrl which is
> and embedded mediaplayer frontend which uses MS Media Player backend on
> Windows or GStreamer on Linux.  
>
> I've definitely got GStreamer installed because other applications run using
> it. I can even write pieces of code in Perl which call Gstreamer directly
> but I've not got
> wxMediaCtrl running yet. I'm getting error "Got an invalid playbin (error
> 0:Success)".  So what am I missing here?

That error message looks like it comes from WxMediaCtrl and not
GStreamer. Maybe you're supposed to call gst_init() yourself before
using it? Does gst-inspect-0.10 playbin show something?

Cheers
 -Tim



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[Steve_Bz]

Hi People,

Well, thanks for that Tim.  In fact I just didn't have the right pluggins
installed.  I installed all the pluggins available under Kubuntu and then
removed them one at a time until it worked with an AVI file.

I now have a related problem in that I can't play a webcam through
wxMediaCtrl.  When I do (I'm using wxPerl)?

        print $i_frame->{Ctl_Videos_Media}->LoadURI ('file:///dev/video0');

It gives me returns "1" but also gives error Gtk-CRITICAL **:
gtk_range_set_range: assertion `min < max' failed, so I guess it is
accessing the URI, but then hitting another error.  According to one of the
developers on a wxPython website it may be missing GStreamer packages. This
sounds like a good avenue to explore so I'm going to try to track this down.
I guess I'll use the binary chop method I used before, but it feels a bit
random.

However, there may be something I need to do specifically for a live source
rather than a file.  

I Currently have:

gstreamer0.10-ffmpeg
libgstreamer0.10-0
libgstreamer-perl
libgstreamer-plugins-base0.10-0
gstreamer0.10-x
gstreamer0.10-doc
gstreamer0.10-plugins-good
gstreamer0.10-plugins-nice
gstreamer0.10-plugins-base
gstreamer0.10-tools

Any thoughts would be very welcome.

Regards

Steve



-----Original Message-----
From: Tim-Philipp Müller [mailto:[hidden email]]
Sent: 12 November 2009 07:56
To: [hidden email]
Subject: Re: [gst-devel] wxMediaCtrl on Linux

On Fri, 2009-11-06 at 10:58 -0200, Steve Cookson wrote:

Hi,

> I have been developing a cross-platform multi-media medical application in
> wxWidgets.  All the original development was done in Windows and I have
just
> ported to Kubuntu 9.10.  One of the main components is wxMediaCtrl which
is
> and embedded mediaplayer frontend which uses MS Media Player backend on
> Windows or GStreamer on Linux.  
>
> I've definitely got GStreamer installed because other applications run
using
> it. I can even write pieces of code in Perl which call Gstreamer directly
> but I've not got
> wxMediaCtrl running yet. I'm getting error "Got an invalid playbin (error
> 0:Success)".  So what am I missing here?

That error message looks like it comes from WxMediaCtrl and not
GStreamer. Maybe you're supposed to call gst_init() yourself before
using it? Does gst-inspect-0.10 playbin show something?

Cheers
 -Tim



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