title: WARNING: erroneous pipeline: no element "rtmpsink"
body: <p>I execute </p>
  
  <pre><code>gst-launch-1.0 -v v4l2src ! 'video/x-raw, width=1024, height=768, 
  framerate=30/1' ! queue ! videoconvert ! h264parse ! flvmux ! rtmpsink 
  location='rtmp://10.168.45.142/live live=1'
  </code></pre>
  
  <p>An error occurred：
      warning erroneous pipeline no element rtmpsink</p>
  
  <p>the nginx service has started, the configuration is as follows, how can I solve it?</p>
  
  <pre><code>rtmp {
      server {
          listen 1935;
          chunk_size 4096;
          application live {
              live on;
              record off;
          }
      }
  }
  </code></pre>