My First Plugin - Help please
Locked
 
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I
am trying to write my first video sink plugin. I
have read the manual and used the autogenerate tool to generate my component.
(MyFramedVideo) I
have created a class that use GST_BOILERPLATE and extends GST_TYPE_VIDEO_SINK. The
plugin builds and installs onto my devices rootfs. I
then run gst-inspect and I keep getting the same error: **** (gst-inspect-0.10:535):
GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstMyFramedVideo.so':
/usr/lib/gstreamer-0.10/libgstMyFramedVideo.so: undefined symbol:
gst_base_sink_get_type **** What
am I doing wrong? I have looked at a great many other plugins and make files
and I do not seem very different!! I can see that this symbol is in
gstcoreelements.so but no one else seems to need to add -lgstcorelements.
Also If I try this it all builds and this error never appears but gst-inspect
just hangs. Really
hope someone can help Many
thanks Daniel
Laird ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: My First Plugin - Help please
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On Tue, 2009-02-03 at 11:06 +0100, Daniel James Laird wrote:
Hi, > I then run gst-inspect and I keep getting the same error: > > (gst-inspect-0.10:535): GStreamer-WARNING **: Failed to load plugin > '/usr/lib/gstreamer-0.10/libgstMyFramedVideo.so': /usr/lib/gstreamer-0.10/libgstMyFramedVideo.so: undefined symbol: gst_base_sink_get_type You need to link to libgstbase-0.10.so in addition to libgstreamer-0.10.so. Add gstreamer-base-0.10 to your pkg-config module list (or the PKG_CHECK_MODULES in configure.ac). You can also check with ldd -r /path/to/your/libgstMyFramedVideo.so. Cheers -Tim ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: My First Plugin - Help please
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Cool,
That solved that issue. The problem now is that it does not show up as a plugin at all. using gst-inspect to list plugins. I cannot work out when I should use BOILERPLATE_FULL and when I should use GST_PLUGIN_DEFINE and gst_element_register as I cannot get a GST_BOILERPLATE_FULL and GstVideoSink to register. Am I missing something really obvious? The manual is a bit vague at this point and any help would be appreciated. Daniel Laird -----Original Message----- From: Tim-Philipp Müller [mailto:[hidden email]] Sent: 2009 Feb 03 11:01 To: [hidden email] Subject: Re: [gst-devel] My First Plugin - Help please On Tue, 2009-02-03 at 11:06 +0100, Daniel James Laird wrote: Hi, > I then run gst-inspect and I keep getting the same error: > > (gst-inspect-0.10:535): GStreamer-WARNING **: Failed to load plugin > '/usr/lib/gstreamer-0.10/libgstMyFramedVideo.so': /usr/lib/gstreamer-0.10/libgstMyFramedVideo.so: undefined symbol: gst_base_sink_get_type You need to link to libgstbase-0.10.so in addition to libgstreamer-0.10.so. Add gstreamer-base-0.10 to your pkg-config module list (or the PKG_CHECK_MODULES in configure.ac). You can also check with ldd -r /path/to/your/libgstMyFramedVideo.so. Cheers -Tim ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: My First Plugin - Help please
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------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: My First Plugin - Help please
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In reply to this post by Daniel Laird
On Tue, 2009-02-03 at 13:05 +0100, Daniel James Laird wrote:
> That solved that issue. The problem now is that it does not show up as a plugin at all. > using gst-inspect to list plugins. Try: $ GST_DEBUG=*:2 gst-inspect-0.10 /path/to/yourplugin.so (or *:3 if the above didn't show any warnings). Make sure the license string in your plugin's GST_PLUGIN_DEFINE() is one of the 'approved' strings (Use "Proprietary" if in doubt). > I cannot work out when I should use BOILERPLATE_FULL and when I should > use GST_PLUGIN_DEFINE and gst_element_register as I cannot get a > GST_BOILERPLATE_FULL and GstVideoSink to register. Am I missing > something really obvious? The manual is a bit vague at this point and > any help would be appreciated. You absolutely need the GST_PLUGIN_DEFINE() block. In it you will reference a plugin_init() function, which you also need. In the plugin_init() function you call gst_element_register() for each element you want to register. In order to do this, you need a GType. You *can* use GST_BOILERPLATE* if you like (it will define a foo_bar_get_type() function for you), but you don't have to if you prefer to do the _get_type() function yourself. Cheers -Tim ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: My First Plugin - Help please
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Thanks that solved it,
I am now busy trying to work out the following debug message: GStreamer-WARNING **: Element myframedvideo0 has an ALWAYS template sink, but no pad of the same name Any pointers appreciated! But I am now past the initial hurdles, many thanks for the help Daniel Laird -----Original Message----- From: Tim-Philipp Müller [mailto:[hidden email]] Sent: 2009 Feb 03 12:28 To: [hidden email] Subject: Re: [gst-devel] My First Plugin - Help please On Tue, 2009-02-03 at 13:05 +0100, Daniel James Laird wrote: > That solved that issue. The problem now is that it does not show up as a plugin at all. > using gst-inspect to list plugins. Try: $ GST_DEBUG=*:2 gst-inspect-0.10 /path/to/yourplugin.so (or *:3 if the above didn't show any warnings). Make sure the license string in your plugin's GST_PLUGIN_DEFINE() is one of the 'approved' strings (Use "Proprietary" if in doubt). > I cannot work out when I should use BOILERPLATE_FULL and when I should > use GST_PLUGIN_DEFINE and gst_element_register as I cannot get a > GST_BOILERPLATE_FULL and GstVideoSink to register. Am I missing > something really obvious? The manual is a bit vague at this point and > any help would be appreciated. You absolutely need the GST_PLUGIN_DEFINE() block. In it you will reference a plugin_init() function, which you also need. In the plugin_init() function you call gst_element_register() for each element you want to register. In order to do this, you need a GType. You *can* use GST_BOILERPLATE* if you like (it will define a foo_bar_get_type() function for you), but you don't have to if you prefer to do the _get_type() function yourself. Cheers -Tim ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: [gst-embedded] My First Plugin - Help please
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In reply to this post by Daniel Laird
do you add libgstbase.so as your sink lib
dependency?
Zhao Liang
From: Daniel James Laird [mailto:[hidden email]] Sent: Tuesday, February 03, 2009 6:07 PM To: [hidden email] Cc: [hidden email] Subject: [gst-embedded] My First Plugin - Help please I am trying to write
my first video sink plugin. I have read the
manual and used the autogenerate tool to generate my component.
(MyFramedVideo) I have created a
class that use GST_BOILERPLATE and extends
GST_TYPE_VIDEO_SINK. The plugin builds and
installs onto my devices rootfs. I then run
gst-inspect and I keep getting the same error: **** (gst-inspect-0.10:535):
GStreamer-WARNING **: Failed to load plugin
'/usr/lib/gstreamer-0.10/libgstMyFramedVideo.so':
/usr/lib/gstreamer-0.10/libgstMyFramedVideo.so: undefined symbol:
gst_base_sink_get_type **** What am I doing
wrong? I have looked at a great many other plugins and make files and I do not
seem very different!! I can see that this symbol is in gstcoreelements.so but no
one else seems to need to add -lgstcorelements. Also If I try this it all
builds and this error never appears but gst-inspect just
hangs. Really hope someone
can help Many
thanks Daniel
Laird ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: My First Plugin - Help please
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In reply to this post by Daniel Laird
Maybe you don't create pad when init, and just add template into class.
Try to create pad in element init. Example: srcpad = gst_pad_new_from_static_template (&srctemplate, "src"); gst_element_add_pad (GST_ELEMENT (elem), srcpad); Zhao Liang -----Original Message----- From: Daniel James Laird [mailto:[hidden email]] Sent: Tuesday, February 03, 2009 9:34 PM To: Discussion of the development of GStreamer Subject: Re: [gst-devel] My First Plugin - Help please Thanks that solved it, I am now busy trying to work out the following debug message: GStreamer-WARNING **: Element myframedvideo0 has an ALWAYS template sink, but no pad of the same name Any pointers appreciated! But I am now past the initial hurdles, many thanks for the help Daniel Laird -----Original Message----- From: Tim-Philipp Müller [mailto:[hidden email]] Sent: 2009 Feb 03 12:28 To: [hidden email] Subject: Re: [gst-devel] My First Plugin - Help please On Tue, 2009-02-03 at 13:05 +0100, Daniel James Laird wrote: > That solved that issue. The problem now is that it does not show up as a plugin at all. > using gst-inspect to list plugins. Try: $ GST_DEBUG=*:2 gst-inspect-0.10 /path/to/yourplugin.so (or *:3 if the above didn't show any warnings). Make sure the license string in your plugin's GST_PLUGIN_DEFINE() is one of the 'approved' strings (Use "Proprietary" if in doubt). > I cannot work out when I should use BOILERPLATE_FULL and when I should > use GST_PLUGIN_DEFINE and gst_element_register as I cannot get a > GST_BOILERPLATE_FULL and GstVideoSink to register. Am I missing > something really obvious? The manual is a bit vague at this point and > any help would be appreciated. You absolutely need the GST_PLUGIN_DEFINE() block. In it you will reference a plugin_init() function, which you also need. In the plugin_init() function you call gst_element_register() for each element you want to register. In order to do this, you need a GType. You *can* use GST_BOILERPLATE* if you like (it will define a foo_bar_get_type() function for you), but you don't have to if you prefer to do the _get_type() function yourself. Cheers -Tim ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
GMainLoop in a separate thread
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Re: My First Plugin - Help please
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In reply to this post by Daniel Laird
Hi,
>I am now busy trying to work out the following debug message: >GStreamer-WARNING **: Element myframedvideo0 has an ALWAYS template sink, >but no pad of the same name >Any pointers appreciated! >But I am now past the initial hurdles, many thanks for the help I think this warning is because in you sink pad template, you must have mentioned the presence field of the pad as GST_PAD_ALWAYS and then not added a sink pad to your element. If you are sure that your element will have a sink pad, it is advisable to add a pad. If you are not sure about the presence of the pad, use GST_PAD_SOMETIMES in the presence field of the template. But to have buffer flow in the pipeline, you need pads connected to downstream pads. Rahul Verma SASKEN BUSINESS DISCLAIMER ------------------------- This message may contain confidential, proprietary or legally privileged information. In case you are not the original intended Recipient of the message, you must not, directly or indirectly, use, Disclose, distribute, print, or copy any part of this message and you are requested to delete it and inform the sender. Any views expressed in this message are those of the individual sender unless otherwise stated. Nothing contained in this message shall be construed as an offer or acceptance of any offer by Sasken Communication Technologies Limited ("Sasken") unless sent with that express intent and with due authority of Sasken. Sasken has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: GMainLoop in a separate thread
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In reply to this post by oscar.ostlund@gmail.com
On Tue, 2009-02-03 at 22:26 -0500, Oscar Östlund wrote:
Hi, (please don't start a new thread as reply to another message.) > I would like to know if it is possible to put the GMainLoop in a > separate thread in order to "forget" about it ? > > I am writing an application that has it own loop mecanism and I would > prefer not having to use the GMainLoop... > > Or should I add a new source to my gmainloop and run everything else > from there ?? You don't have to use a GMainLoop at all. You just need to make sure you handle messages on the pipeline bus somehow. You can do this by regularly calling gst_bus_pop() if you like. The GSource/GMainLoop integration stuff is just a bonus for Gtk+/GUI applications. Cheers -Tim ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: GMainLoop in a separate thread
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