title: GStreamer missing plugins on Windows
body: <p>I have installed the latest version of gstreamer (v1.16.2) on a Windows 10 with a full installation and testing simple examples I have checked that several common elements are missing.</p>
  
  <p>With a command like:</p>
  
  <pre><code>gst-launch-1.0 videotestsrc ! capsfilter caps=video/x-raw,format=GRAY8 ! videoconvert ! autovideosink
  </code></pre>
  
  <p>I receive this log:</p>
  
  <pre><code>GST_INIT gst.c:810:init_post: initialized GStreamer successfully
  GST_PIPELINE gstparse.c:337:gst_parse_launch_full: parsing pipeline description 'videotestsrc ! capsfilter caps=video/x-raw,format=GRAY8 ! videoconvert ! autovideosink '
  GST_ELEMENT_FACTORY gstelementfactory.c:462:gst_element_factory_make: no such element factory "videotestsrc"!
  GST_PIPELINE grammar.y:816:priv_gst_parse_yyparse: no element "videotestsrc"
  GST_ELEMENT_FACTORY gstelementfactory.c:462:gst_element_factory_make: no such element factory "capsfilter"!
  GST_PIPELINE grammar.y:816:priv_gst_parse_yyparse: no element "capsfilter"
  GST_PIPELINE grammar.y:901:priv_gst_parse_yyparse: link has no source [sink=@0000000000000000]
  GST_ELEMENT_FACTORY gstelementfactory.c:462:gst_element_factory_make: no such element factory "videoconvert"!
  GST_PIPELINE grammar.y:816:priv_gst_parse_yyparse: no element "videoconvert"
  GST_PIPELINE grammar.y:901:priv_gst_parse_yyparse: link has no source [sink=@0000000000000000]
  GST_ELEMENT_FACTORY stelementfactory.c:462:gst_element_factory_make: no such element factory "autovideosink"!
  GST_PIPELINE grammar.y:816:priv_gst_parse_yyparse: no element "autovideosink"
  GST_PIPELINE grammar.y:901:priv_gst_parse_yyparse: link has no source [sink=@0000000000000000]
  </code></pre>
  
  <p>I also have checked that the installer creates a new environment variable <strong>GSTREAMER_1_0_ROOT_X86_64</strong> pointing to <strong>C:\gstreamer\1.0\x86_64</strong> and it also adds the <strong>bin</strong> folder to the <strong>Path</strong>.</p>
  
  <p>Does the MSI installer need any additional step to register its plugins on a Windows Machine ?</p>