[Bug 722981] New: autodetect elements have inconsistent handling of autoplugin

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=722981
  GStreamer | gst-plugins-good | 1.x

           Summary: autodetect elements have inconsistent handling of
                    autoplugin
    Classification: Platform
           Product: GStreamer
           Version: 1.x
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: ensonic at sonicpulse.de
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


The gst_auto_*_find_best() methods are a little inconsistent with regards to
error handling. If we have candidate elements and they don't work, we post a
message and leave the bin empty. If we have no candidates, we plug a
fakesink/src.

I guess posting a missing-elements message if we have no candidates makes
little sense. two ideas:

a) If we have candidates, but none of them works, we post only a warning and
plug fakesink/src as well. But that sounds like hiding the issue.

b) If we have no candidates we also post an error.

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