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[homepage.git] / blog / archive / 2018 / 07 / 07.rss

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@@ -6,6 +6,106 @@
                 <link>http://people.skolelinux.org/pere/blog/</link>
 
        
+       <item>
+               <title>Simple streaming the Linux desktop to Kodi using GStreamer and RTP</title>
+               <link>http://people.skolelinux.org/pere/blog/Simple_streaming_the_Linux_desktop_to_Kodi_using_GStreamer_and_RTP.html</link>        
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Simple_streaming_the_Linux_desktop_to_Kodi_using_GStreamer_and_RTP.html</guid>
+                <pubDate>Thu, 12 Jul 2018 17:55:00 +0200</pubDate>
+               <description>&lt;p&gt;Last night, I wrote
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html&quot;&gt;a
+recipe to stream a Linux desktop using VLC to a instance of Kodi&lt;/a&gt;.
+During the day I received valuable feedback, and thanks to the
+suggestions I have been able to rewrite the recipe into a much simpler
+approach requiring no setup at all.  It is a single script that take
+care of it all.&lt;/p&gt;
+
+&lt;p&gt;This new script uses GStreamer instead of VLC to capture the
+desktop and stream it to Kodi.  This fixed the video quality issue I
+saw initially.  It further removes the need to add a m3u file on the
+Kodi machine, as it instead connects to
+&lt;a href=&quot;https://kodi.wiki/view/JSON-RPC_API/v8&quot;&gt;the JSON-RPC API in
+Kodi&lt;/a&gt; and simply ask Kodi to play from the stream created using
+GStreamer.  Streaming the desktop to Kodi now become trivial.  Copy
+the script below, run it with the DNS name or IP address of the kodi
+server to stream to as the only argument, and watch your screen show
+up on the Kodi screen.  Note, it depend on multicast on the local
+network, so if you need to stream outside the local network, the
+script must be modified.  Note, I have no idea if audio work, as I
+only care about the picture part.&lt;/p&gt;
+
+&lt;blockquote&gt;&lt;pre&gt;
+#!/bin/sh
+#
+# Stream the Linux desktop view to Kodi.  See
+# http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html
+# for backgorund information.
+
+# Make sure the stream is stopped in Kodi and the gstreamer process is
+# killed if something go wrong (for example if curl is unable to find the
+# kodi server).  Do the same when interrupting this script.
+kodicmd() {
+    host=&quot;$1&quot;
+    cmd=&quot;$2&quot;
+    params=&quot;$3&quot;
+    curl --silent --header &#39;Content-Type: application/json&#39; \
+        --data-binary &quot;{ \&quot;id\&quot;: 1, \&quot;jsonrpc\&quot;: \&quot;2.0\&quot;, \&quot;method\&quot;: \&quot;$cmd\&quot;, \&quot;params\&quot;: $params }&quot; \
+        &quot;http://$host/jsonrpc&quot;
+}
+cleanup() {
+    if [ -n &quot;$kodihost&quot; ] ; then
+       # Stop the playing when we end
+       playerid=$(kodicmd &quot;$kodihost&quot; Player.GetActivePlayers &quot;{}&quot; |
+                           jq .result[].playerid)
+       kodicmd &quot;$kodihost&quot; Player.Stop &quot;{ \&quot;playerid\&quot; : $playerid }&quot; &gt; /dev/null
+    fi
+    if [ &quot;$gstpid&quot; ] &amp;&amp; kill -0 &quot;$gstpid&quot; &gt;/dev/null 2&gt;&amp;1; then
+       kill &quot;$gstpid&quot;
+    fi
+}
+trap cleanup EXIT INT
+
+if [ -n &quot;$1&quot; ]; then
+    kodihost=$1
+    shift
+else
+    kodihost=kodi.local
+fi
+
+mcast=239.255.0.1
+mcastport=1234
+mcastttl=1
+
+pasrc=$(pactl list | grep -A2 &#39;Source #&#39; | grep &#39;Name: .*\.monitor$&#39; | \
+  cut -d&quot; &quot; -f2|head -1)
+gst-launch-1.0 ximagesrc use-damage=0 ! video/x-raw,framerate=30/1 ! \
+  videoconvert ! queue2 ! \
+  x264enc bitrate=8000 speed-preset=superfast tune=zerolatency qp-min=30 \
+  key-int-max=15 bframes=2 ! video/x-h264,profile=high ! queue2 ! \
+  mpegtsmux alignment=7 name=mux ! rndbuffersize max=1316 min=1316 ! \
+  udpsink host=$mcast port=$mcastport ttl-mc=$mcastttl auto-multicast=1 sync=0 \
+  pulsesrc device=$pasrc ! audioconvert ! queue2 ! avenc_aac ! queue2 ! mux. \
+  &gt; /dev/null 2&gt;&amp;1 &amp;
+gstpid=$!
+
+# Give stream a second to get going
+sleep 1
+
+# Ask kodi to start streaming using its JSON-RPC API
+kodicmd &quot;$kodihost&quot; Player.Open \
+       &quot;{\&quot;item\&quot;: { \&quot;file\&quot;: \&quot;udp://@$mcast:$mcastport\&quot; } }&quot; &gt; /dev/null
+
+# wait for gst to end
+wait &quot;$gstpid&quot;
+&lt;/pre&gt;&lt;/blockquote&gt;
+
+&lt;p&gt;I hope you find the approach useful.  I know I do.&lt;/p&gt;
+
+&lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;
+</description>
+       </item>
+       
        <item>
                <title>Streaming the Linux desktop to Kodi using VLC and RTSP</title>
                <link>http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html</link>