1st November 2018

+apt install vlc-plugin-bittorrent
+
+#!/usr/bin/python3
+
+"""
+
+Python 3 script demonstrating how to use the rfc3161ng module to
+get trusted timestamps.
+
+The license of this code is the same as the license of the rfc3161ng
+library, ie MIT/BSD.
+
+"""
+
+import os
+import pyasn1.codec.der
+import rfc3161ng
+import subprocess
+import tempfile
+import urllib.request
+
+def store(f, data):
+    f.write(data)
+    f.flush()
+    f.seek(0)
+
+def fetch(url, f=None):
+    response = urllib.request.urlopen(url)
+    data = response.read()
+    if f:
+        store(f, data)
+    return data
+
+def main():
+    with tempfile.NamedTemporaryFile() as cert_f,\
+    	 tempfile.NamedTemporaryFile() as ca_f,\
+    	 tempfile.NamedTemporaryFile() as msg_f,\
+    	 tempfile.NamedTemporaryFile() as tsr_f:
+
+        # First fetch certificates used by service
+        certificate_data = fetch('https://freetsa.org/files/tsa.crt', cert_f)
+        ca_data_data = fetch('https://freetsa.org/files/cacert.pem', ca_f)
+
+        # Then timestamp the message
+        timestamper = \
+            rfc3161ng.RemoteTimestamper('http://freetsa.org/tsr',
+                                        certificate=certificate_data)
+        data = b"Python forever!\n"
+        tsr = timestamper(data=data, return_tsr=True)
+
+        # Finally, convert message and response to something 'openssl ts' can verify
+        store(msg_f, data)
+        store(tsr_f, pyasn1.codec.der.encoder.encode(tsr))
+        args = ["openssl", "ts", "-verify",
+                "-data", msg_f.name,
+	        "-in", tsr_f.name,
+		"-CAfile", ca_f.name,
+                "-untrusted", cert_f.name]
+        subprocess.check_call(args)
+
+if '__main__' == __name__:
+   main()
+
-exiftool -headline='The RSS image title' \
-  -description='The RSS image description.' \
-  -subject+=for-family photo.jpeg
-
-#!/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="$1"
-    cmd="$2"
-    params="$3"
-    curl --silent --header 'Content-Type: application/json' \
-	 --data-binary "{ \"id\": 1, \"jsonrpc\": \"2.0\", \"method\": \"$cmd\", \"params\": $params }" \
-	 "http://$host/jsonrpc"
-}
-cleanup() {
-    if [ -n "$kodihost" ] ; then
-	# Stop the playing when we end
-	playerid=$(kodicmd "$kodihost" Player.GetActivePlayers "{}" |
-			    jq .result[].playerid)
-	kodicmd "$kodihost" Player.Stop "{ \"playerid\" : $playerid }" > /dev/null
-    fi
-    if [ "$gstpid" ] && kill -0 "$gstpid" >/dev/null 2>&1; then
-	kill "$gstpid"
-    fi
-}
-trap cleanup EXIT INT
-
-if [ -n "$1" ]; then
-    kodihost=$1
-    shift
-else
-    kodihost=kodi.local
-fi
-
-mcast=239.255.0.1
-mcastport=1234
-mcastttl=1
-
-pasrc=$(pactl list | grep -A2 'Source #' | grep 'Name: .*\.monitor$' | \
-  cut -d" " -f2|head -1)
-gst-launch-1.0 ximagesrc use-damage=0 ! video/x-raw,framerate=30/1 ! \
-  videoconvert ! queue2 ! \
-  x264enc bitrate=8000 speed-preset=superfast tune=zerolatency qp-min=30 \
-  key-int-max=15 bframes=2 ! video/x-h264,profile=high ! queue2 ! \
-  mpegtsmux alignment=7 name=mux ! rndbuffersize max=1316 min=1316 ! \
-  udpsink host=$mcast port=$mcastport ttl-mc=$mcastttl auto-multicast=1 sync=0 \
-  pulsesrc device=$pasrc ! audioconvert ! queue2 ! avenc_aac ! queue2 ! mux. \
-  > /dev/null 2>&1 &
-gstpid=$!
-
-# Give stream a second to get going
-sleep 1
-
-# Ask kodi to start streaming using its JSON-RPC API
-kodicmd "$kodihost" Player.Open \
-	"{\"item\": { \"file\": \"udp://@$mcast:$mcastport\" } }" > /dev/null
-
-# wait for gst to end
-wait "$gstpid"
-
-vlc screen:// --sout \
-  '#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:rtp{dst=projector.local,port=1234,sdp=rtsp://192.168.11.4:8080/test.sdp}'
-
-echo rtsp://192.168.11.4:8080/test.sdp \
-  > /storage/videos/screenstream.m3u
-
-cvlc screen:// --sout \
-  '#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:rtp{sdp=rtsp://:8080/}'
-
-echo rtsp://192.168.11.4:8080/ \
-  > /storage/videos/screenstream.m3u
-
-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=239.255.0.1 port=1234 ttl-mc=1 auto-multicast=1 sync=0 \
-  pulsesrc device=$(pactl list | grep -A2 'Source #' | \
-    grep 'Name: .*\.monitor$' |  cut -d" " -f2|head -1) ! \
-  audioconvert ! queue2 ! avenc_aac ! queue2 ! mux.
-
-echo udp://@239.255.0.1:1234 \
-  > /storage/videos/screenstream.m3u
-
-cvlc screen:// --sout '#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:rtp{mux=ts,dst=239.255.0.1,port=1234,sdp=sap}'
-