[Bug 689182] [pitivi] Making a frei0r ElementFactory does a lot of I/O and slows down startup

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=689182
  GStreamer | gst-plugins-bad | 1.0.2

Tim-Philipp Müller <t.i.m> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEEDINFO
                 CC|                            |t.i.m at zen.co.uk

--- Comment #3 from Tim-Philipp Müller <t.i.m at zen.co.uk> 2012-11-27 23:38:35 UTC ---
What does this show:

 $ ls -1 /usr/lib/frei0r-1/*so | wc -l

It's not entirely surprising that it takes some time, since it needs to dlopen
all those frei0r plugins. It's different for libav, there are no plugins
involved there.

> # With factory makes, used for checking for the availability of specific features
> if Gst.ElementFactory.make("frei0r-filter-scale0tilt", None) is None:
>    pass

There's no need to create an element (and force loading of the gstreamer plugin
and all wrapped plugins) to test the availability of a specific feature.

Use something like

 registry = gst.registry_get()
 if registry.lookup_feature('frei0r-filter-scale0tilt'):
   pass

or:

 registry = gst.registry_get()
 if registry.check_feature_version ('frei0r-filter-scale0tilt', 1, 0, 0):
   pass

Looks like NOTABUG to me.

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