title: No such element or plugin 'v4l2h264enc'
body: <p>I'm trying to use GStreamer from docker container, built using <a href="https://github.com/GoogleCloudPlatform/selkies-vdi/blob/cgc-docs/images/gst-base/Dockerfile" rel="nofollow noreferrer">this</a> Dockerfile.</p>
  <p>The installation worked ok and I'm able to run GStreamer. However, I'm not able to use the element <code>v4l2h264enc</code> with the error that does not exist. When I run gst-inspect I get:</p>
  <pre><code>root@95e1ff54cca5:~# gst-inspect-1.0 v4l2h264enc
  No such element or plugin 'v4l2h264enc'
  </code></pre>
  <p>But <code>v4l2src</code> works fine:</p>
  <pre><code>root@95e1ff54cca5:~# gst-inspect-1.0 v4l2src
  Factory Details:
    Rank                     primary (256)
    Long-name                Video (video4linux2) Source
    Klass                    Source/Video
    Description              Reads frames from a Video4Linux2 device
    Author                   Edgard Lima &lt;edgard.lima@gmail.com&gt;, Stefan Kost &lt;ensonic@users.sf.net&gt;
  
  Plugin Details:
    Name                     video4linux2
    Description              elements for Video 4 Linux
    Filename                 /usr/lib/arm-linux-gnueabihf/gstreamer-1.0/libgstvideo4linux2.so
    Version                  1.18.0
    License                  LGPL
    Source module            gst-plugins-good
    Source release date      2020-09-08
    Binary package           GStreamer Good Plug-ins source release
    Origin URL               Unknown package origin
  </code></pre>
  <p>I have checked in the <code>build</code> folder of <code>gst-plugins-good</code> and I think that <code>v4l2h265enc</code> library was compiled (there's a file named <code>gstv4l2h265enc.c.o</code>). I tried to add the folder where the file is to <code>LD_LIBRARY_PATH</code> and <code>GST_PLUGIN_PATH</code> but it didn't work.</p>