[MacPorts] #28052: py26-gst-python: 'python' plugin does not work because libpython2.6 cannot be found

[MacPorts]

#28052: py26-gst-python: 'python' plugin does not work because libpython2.6 cannot
be found
---------------------------------+------------------------------------------
 Reporter:  lsinger@…            |       Owner:  rmstonecipher@…           
     Type:  defect               |      Status:  new                       
 Priority:  Normal               |   Milestone:                            
Component:  ports                |     Version:  1.9.2                     
 Keywords:                       |        Port:  py26-gst-python           
---------------------------------+------------------------------------------

Comment(by lsinger@…):

 Replying to [comment:3 rmstonecipher@…]:
 > While I have confirmed that your method changes something, I'm a little
 concerned about ~/.gstreamer-0.10/.[[br]]
 > I am not comfortable with the idea of having port remove a file in a
 user's home directory so that gstreamer can recreate that file.[[br]]

 But port doesn't delete the registry.  I just added the instruction to
 delete it so that gst-inspect would be forced to attempt to load all
 plugins.  If the plugin scanner fails to load a particular plugin, it will
 'blacklist' it by making a note in the registry not to try to load it.

 If you had previously run gst-inspect and it had not been able to load the
 plugin 'python', then you would see just the error message

 {{{
 No such element or plugin 'python'
 }}}

 Whereas if you start without a plugin registry then you should get this
 more informative version:

 {{{
 0:00:00.004724000  1735   0x606b00 WARN                pyplugin
 gstpythonplugin.c:373:plugin_init: Couldn't g_module_open libpython.
 Reason: dlopen(/usr/lib/libpython2.6.dylib, 10): image not found
 0:00:00.004784000  1735   0x606b00 WARN      GST_PLUGIN_LOADING
 gstplugin.c:558:gst_plugin_register_func: plugin
 "/opt/local/Library/Frameworks/Python.framework/Versions/Current/lib/gstreamer-0.10/libgstpython.so"
 failed to initialise
 0:00:00.005348000  1735   0x606b00 WARN                pyplugin
 gstpythonplugin.c:373:plugin_init: Couldn't g_module_open libpython.
 Reason: dlopen(/usr/lib/libpython2.6.dylib, 10): image not found
 0:00:00.005366000  1735   0x606b00 WARN      GST_PLUGIN_LOADING
 gstplugin.c:558:gst_plugin_register_func: plugin
 "/opt/local/Library/Frameworks/Python.framework/Versions/Current/lib/gstreamer-0.10/libgstpython.so"
 failed to initialise
 No such element or plugin 'python'
 }}}

 > Also, my results were not the same as yours:[[br]]
 > {{{
 > euclid:~ ryan$ rm .gstreamer-0.10/registry.*
 > euclid:~ ryan$ gst-inspect --gst-plugin-
 path=/opt/local/Library/Frameworks/Python.framework/Versions/Current/lib/gstreamer-0.10
 python
 >
 > (gst-plugin-scanner:76458): GStreamer-WARNING **: Failed to load plugin
 '/opt/local/lib/gstreamer-0.10/libgstcog.so':
 dlopen(/opt/local/lib/gstreamer-0.10/libgstcog.so, 2): Library not loaded:
 /opt/local/lib/libpng12.0.dylib
 >   Referenced from: /opt/local/lib/gstreamer-0.10/libgstcog.so
 >   Reason: image not found
 >
 > (gst-plugin-scanner:76458): GStreamer-WARNING **: Failed to load plugin
 '/opt/local/lib/gstreamer-0.10/libgstopengl.so':
 dlopen(/opt/local/lib/gstreamer-0.10/libgstopengl.so, 2): Library not
 loaded: /opt/local/lib/libpng12.0.dylib
 >   Referenced from: /opt/local/lib/gstreamer-0.10/libgstopengl.so
 >   Reason: image not found
 > No such element or plugin 'python'
 > }}}
 > It looks like the above warnings are caused by shortcomings of files
 installed by gst-plugins-bad and gst-plugins-gl and would appreciate it if
 you would confirm that suspicion.[[br]]

 Is this with or without the patch?

 The error messages about libgstcog and libgstopengl are not related to
 gst-python.  They are error messages about different plugins.  Both
 libgstcog and libgstopengl depend on libpng, which could not be found in
 /opt/local/lib.

 I've seen that sort of error message about libpng before.  Which version
 of the libpng port do you have installed?  Is it possible that you built
 gst-plugins-bad and gst-plugins-gl against libpng 1.2 and later upgraded
 libpng to 1.4?  This was the case with me; the name of the library changed
 from libpng12 to libpng14.

-- 
Ticket URL: <https://trac.macports.org/ticket/28052#comment:4>
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