blog/index.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   2           "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
   3 <html xmlns="http://www.w3.org/1999/xhtml" dir="ltr">
   4   <head>
   5     <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
   6     <title>Petter Reinholdtsen</title>
   7     <link rel="stylesheet" type="text/css" media="screen" href="http://people.skolelinux.org/pere/blog/style.css" />
   8     <link rel="stylesheet" type="text/css" media="screen" href="http://people.skolelinux.org/pere/blog/vim.css" />
   9     <link rel="alternate" title="RSS Feed" href="http://people.skolelinux.org/pere/blog/index.rss" type="application/rss+xml" />
  10   </head>
  11   <body>
  12     <div class="title">
  13  <h1>
  14      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  15
  16  </h1>
  17
  18 </div>
  19
  20
  21
  22     <div class="entry">
  23       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Valutakrambod___A_python_and_bitcoin_love_story.html">Valutakrambod - A python and bitcoin love story</a></div>
  24       <div class="date">29th September 2018</div>
  25       <div class="body"><p>It would come as no surprise to anyone that I am interested in
  26 bitcoins and virtual currencies.  I've been keeping an eye on virtual
  27 currencies for many years, and it is part of the reason a few months
  28 ago, I started writing a python library for collecting currency
  29 exchange rates and trade on virtual currency exchanges.  I decided to
  30 name the end result valutakrambod, which perhaps can be translated to
  31 small currency shop.</p>
  32
  33 <p>The library uses the tornado python library to handle HTTP and
  34 websocket connections, and provide a asynchronous system for
  35 connecting to and tracking several services.  The code is available
  36 from
  37 <a href="http://github.com/petterreinholdtsen/valutakrambod">github</a>.</p>
  38
  39 </p>There are two example clients of the library.  One is very simple and
  40 list every updated buy/sell price received from the various services.
  41 This code is started by running bin/btc-rates and call the client code
  42 in valutakrambod/client.py.  The simple client look like this:</p>
  43
  44 <p><blockquote><pre>
  45 import functools
  46 import tornado.ioloop
  47 import valutakrambod
  48 class SimpleClient(object):
  49     def __init__(self):
  50         self.services = []
  51         self.streams = []
  52         pass
  53     def newdata(self, service, pair, changed):
  54         print("%-15s %s-%s: %8.3f %8.3f" % (
  55             service.servicename(),
  56             pair[0],
  57             pair[1],
  58             service.rates[pair]['ask'],
  59             service.rates[pair]['bid'])
  60         )
  61     async def refresh(self, service):
  62         await service.fetchRates(service.wantedpairs)
  63     def run(self):
  64         self.ioloop = tornado.ioloop.IOLoop.current()
  65         self.services = valutakrambod.service.knownServices()
  66         for e in self.services:
  67             service = e()
  68             service.subscribe(self.newdata)
  69             stream = service.websocket()
  70             if stream:
  71                 self.streams.append(stream)
  72             else:
  73                 # Fetch information from non-streaming services immediately
  74                 self.ioloop.call_later(len(self.services),
  75                                        functools.partial(self.refresh, service))
  76                 # as well as regularly
  77                 service.periodicUpdate(60)
  78         for stream in self.streams:
  79             stream.connect()
  80         try:
  81             self.ioloop.start()
  82         except KeyboardInterrupt:
  83             print("Interrupted by keyboard, closing all connections.")
  84             pass
  85         for stream in self.streams:
  86             stream.close()
  87 </pre></blockquote></p>
  88
  89 <p>The library client loop over all known "public" services,
  90 initialises it, subscribe to any updates from the service, check and
  91 activate websocket streaming if the service provide it, and if no
  92 streaming is supported, fetch information from the service and set up
  93 a periodic update every 60 seconds.  The output from this client can
  94 look like this:</p>
  95
  96 <p><blockquote><pre>
  97 Bl3p            BTC-EUR: 5687.110 5653.690
  98 Bl3p            BTC-EUR: 5687.110 5653.690
  99 Bl3p            BTC-EUR: 5687.110 5653.690
 100 Hitbtc          BTC-USD: 6594.560 6593.690
 101 Hitbtc          BTC-USD: 6594.560 6593.690
 102 Bl3p            BTC-EUR: 5687.110 5653.690
 103 Hitbtc          BTC-USD: 6594.570 6593.690
 104 Bitstamp        EUR-USD:    1.159    1.154
 105 Hitbtc          BTC-USD: 6594.570 6593.690
 106 Hitbtc          BTC-USD: 6594.580 6593.690
 107 Hitbtc          BTC-USD: 6594.580 6593.690
 108 Hitbtc          BTC-USD: 6594.580 6593.690
 109 Bl3p            BTC-EUR: 5687.110 5653.690
 110 Paymium         BTC-EUR: 5680.000 5620.240
 111 </pre></blockquote></p>
 112
 113 <p>The exchange order book is tracked in addition to the best buy/sell
 114 price, for those that need to know the details.</p>
 115
 116 <p>The other example client is focusing on providing a curses view
 117 with updated buy/sell prices as soon as they are received from the
 118 services.  This code is located in bin/btc-rates-curses and activated
 119 by using the '-c' argument.  Without the argument the "curses" output
 120 is printed without using curses, which is useful for debugging.  The
 121 curses view look like this:</p>
 122
 123 <p><blockquote><pre>
 124            Name Pair   Bid         Ask         Spr    Ftcd    Age
 125  BitcoinsNorway BTCEUR   5591.8400   5711.0800   2.1%   16    nan     60
 126        Bitfinex BTCEUR   5671.0000   5671.2000   0.0%   16     22     59
 127         Bitmynt BTCEUR   5580.8000   5807.5200   3.9%   16     41     60
 128          Bitpay BTCEUR   5663.2700         nan   nan%   15    nan     60
 129        Bitstamp BTCEUR   5664.8400   5676.5300   0.2%    0      1      1
 130            Bl3p BTCEUR   5653.6900   5684.9400   0.5%    0    nan     19
 131        Coinbase BTCEUR   5600.8200   5714.9000   2.0%   15    nan    nan
 132          Kraken BTCEUR   5670.1000   5670.2000   0.0%   14     17     60
 133         Paymium BTCEUR   5620.0600   5680.0000   1.1%    1   7515    nan
 134  BitcoinsNorway BTCNOK  52898.9700  54034.6100   2.1%   16    nan     60
 135         Bitmynt BTCNOK  52960.3200  54031.1900   2.0%   16     41     60
 136          Bitpay BTCNOK  53477.7833         nan   nan%   16    nan     60
 137        Coinbase BTCNOK  52990.3500  54063.0600   2.0%   15    nan    nan
 138         MiraiEx BTCNOK  52856.5300  54100.6000   2.3%   16    nan    nan
 139  BitcoinsNorway BTCUSD   6495.5300   6631.5400   2.1%   16    nan     60
 140        Bitfinex BTCUSD   6590.6000   6590.7000   0.0%   16     23     57
 141          Bitpay BTCUSD   6564.1300         nan   nan%   15    nan     60
 142        Bitstamp BTCUSD   6561.1400   6565.6200   0.1%    0      2      1
 143        Coinbase BTCUSD   6504.0600   6635.9700   2.0%   14    nan    117
 144          Gemini BTCUSD   6567.1300   6573.0700   0.1%   16     89    nan
 145          Hitbtc+BTCUSD   6592.6200   6594.2100   0.0%    0      0      0
 146          Kraken BTCUSD   6565.2000   6570.9000   0.1%   15     17     58
 147   Exchangerates EURNOK      9.4665      9.4665   0.0%   16 107789    nan
 148      Norgesbank EURNOK      9.4665      9.4665   0.0%   16 107789    nan
 149        Bitstamp EURUSD      1.1537      1.1593   0.5%    4      5      1
 150   Exchangerates EURUSD      1.1576      1.1576   0.0%   16 107789    nan
 151  BitcoinsNorway LTCEUR      1.0000     49.0000  98.0%   16    nan    nan
 152  BitcoinsNorway LTCNOK    492.4800    503.7500   2.2%   16    nan     60
 153  BitcoinsNorway LTCUSD      1.0221     49.0000  97.9%   15    nan    nan
 154      Norgesbank USDNOK      8.1777      8.1777   0.0%   16 107789    nan
 155 </pre></blockquote></p>
 156
 157 <p>The code for this client is too complex for a simple blog post, so
 158 you will have to check out the git repository to figure out how it
 159 work.  What I can tell is how the three last numbers on each line
 160 should be interpreted.  The first is how many seconds ago information
 161 was received from the service.  The second is how long ago, according
 162 to the service, the provided information was updated.  The last is an
 163 estimate on how often the buy/sell values change.</p>
 164
 165 <p>If you find this library useful, or would like to improve it, I
 166 would love to hear from you.  Note that for some of the services I've
 167 implemented a trading API.  It might be the topic of a future blog
 168 post.</p>
 169
 170 <p>As usual, if you use Bitcoin and want to show your support of my
 171 activities, please send Bitcoin donations to my address
 172 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 173 </div>
 174       <div class="tags">
 175
 176
 177         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 178
 179
 180       </div>
 181     </div>
 182     <div class="padding"></div>
 183
 184     <div class="entry">
 185       <div class="title"><a href="http://people.skolelinux.org/pere/blog/VLC_in_Debian_now_can_do_bittorrent_streaming.html">VLC in Debian now can do bittorrent streaming</a></div>
 186       <div class="date">24th September 2018</div>
 187       <div class="body"><p>Back in February, I got curious to see
 188 <a href="http://people.skolelinux.org/pere/blog/Using_VLC_to_stream_bittorrent_sources.html">if
 189 VLC now supported Bittorrent streaming</a>.  It did not, despite the
 190 fact that the idea and code to handle such streaming had been floating
 191 around for years.  I did however find
 192 <a href="https://github.com/johang/vlc-bittorrent">a standalone plugin
 193 for VLC</a> to do it, and half a year later I decided to wrap up the
 194 plugin and get it into Debian.  I uploaded it to NEW a few days ago,
 195 and am very happy to report that it
 196 <a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">entered
 197 Debian</a> a few hours ago, and should be available in Debian/Unstable
 198 tomorrow, and Debian/Testing in a few days.</p>
 199
 200 <p>With the vlc-plugin-bittorrent package installed you should be able
 201 to stream videos using a simple call to</p>
 202
 203 <p><blockquote><pre>
 204 vlc https://archive.org/download/TheGoat/TheGoat_archive.torrent
 205 </pre></blockquote></p>
 206
 207 </p>It can handle magnet links too.  Now if only native vlc had
 208 bittorrent support.  Then a lot more would be helping each other to
 209 share public domain and creative commons movies.  The plugin need some
 210 stability work with seeking and picking the right file in a torrent
 211 with many files, but is already usable.  Please note that the plugin
 212 is not removing downloaded files when vlc is stopped, so it can fill
 213 up your disk if you are not careful.  Have fun. :)</p>
 214
 215 <p>I would love to get help maintaining this package.  Get in touch if
 216 you are interested.</p>
 217
 218 <p>As usual, if you use Bitcoin and want to show your support of my
 219 activities, please send Bitcoin donations to my address
 220 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 221 </div>
 222       <div class="tags">
 223
 224
 225         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
 226
 227
 228       </div>
 229     </div>
 230     <div class="padding"></div>
 231
 232     <div class="entry">
 233       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Using_the_Kodi_API_to_play_Youtube_videos.html">Using the Kodi API to play Youtube videos</a></div>
 234       <div class="date"> 2nd September 2018</div>
 235       <div class="body"><p>I continue to explore my Kodi installation, and today I wanted to
 236 tell it to play a youtube URL I received in a chat, without having to
 237 insert search terms using the on-screen keyboard.  After searching the
 238 web for API access to the Youtube plugin and testing a bit, I managed
 239 to find a recipe that worked.  If you got a kodi instance with its API
 240 available from http://kodihost/jsonrpc, you can try the following to
 241 have check out a nice cover band.</p>
 242
 243 <p><blockquote><pre>curl --silent --header 'Content-Type: application/json' \
 244   --data-binary '{ "id": 1, "jsonrpc": "2.0", "method": "Player.Open",
 245   "params": {"item": { "file":
 246   "plugin://plugin.video.youtube/play/?video_id=LuRGVM9O0qg" } } }' \
 247   http://projector.local/jsonrpc</pre></blockquote></p>
 248
 249 <p>I've extended kodi-stream program to take a video source as its
 250 first argument.  It can now handle direct video links, youtube links
 251 and 'desktop' to stream my desktop to Kodi.  It is almost like a
 252 Chromecast. :)</p>
 253
 254 <p>As usual, if you use Bitcoin and want to show your support of my
 255 activities, please send Bitcoin donations to my address
 256 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 257 </div>
 258       <div class="tags">
 259
 260
 261         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
 262
 263
 264       </div>
 265     </div>
 266     <div class="padding"></div>
 267
 268     <div class="entry">
 269       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Software_created_using_taxpayers__money_should_be_Free_Software.html">Software created using taxpayers’ money should be Free Software</a></div>
 270       <div class="date">30th August 2018</div>
 271       <div class="body"><p>It might seem obvious that software created using tax money should
 272 be available for everyone to use and improve.  Free Software
 273 Foundation Europe recentlystarted a campaign to help get more people
 274 to understand this, and I just signed the petition on
 275 <a href="https://publiccode.eu/">Public Money, Public Code</a> to help
 276 them. I hope you too will do the same.</p>
 277 </div>
 278       <div class="tags">
 279
 280
 281         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett</a>.
 282
 283
 284       </div>
 285     </div>
 286     <div class="padding"></div>
 287
 288     <div class="entry">
 289       <div class="title"><a href="http://people.skolelinux.org/pere/blog/A_bit_more_on_privacy_respecting_health_monitor___fitness_tracker.html">A bit more on privacy respecting health monitor / fitness tracker</a></div>
 290       <div class="date">13th August 2018</div>
 291       <div class="body"><p>A few days ago, I wondered if there are any privacy respecting
 292 health monitors and/or fitness trackers available for sale these days.
 293 I would like to buy one, but do not want to share my personal data
 294 with strangers, nor be forced to have a mobile phone to get data out
 295 of the unit.  I've received some ideas, and would like to share them
 296 with you.
 297
 298 One interesting data point was a pointer to a Free Software app for
 299 Android named
 300 <a href="https://github.com/Freeyourgadget/Gadgetbridge/">Gadgetbridge</a>.
 301 It provide cloudless collection and storing of data from a variety of
 302 trackers.  Its
 303 <a href="https://github.com/Freeyourgadget/Gadgetbridge/#supported-devices">list
 304 of supported devices</a> is a good indicator for units where the
 305 protocol is fairly open, as it is obviously being handled by Free
 306 Software.  Other units are reportedly encrypting the collected
 307 information with their own public key, making sure only the vendor
 308 cloud service is able to extract data from the unit.  The people
 309 contacting me about Gadgetbirde said they were using
 310 <a href="https://us.amazfit.com/shop/bip?variant=336750">Amazfit
 311 Bip</a> and
 312 <a href="http://www.xiaomimi6phone.com/xiaomi-mi-band-3-features-release-date-rumors/">Xiaomi
 313 Band 3</a>.</p>
 314
 315 <p>I also got a suggestion to look at some of the units from Garmin.
 316 I was told their GPS watches can be connected via USB and show up as a
 317 USB storage device with
 318 <a href="https://www.gpsbabel.org/htmldoc-development/fmt_garmin_fit.html">Garmin
 319 FIT files</a> containing the collected measurements.  While
 320 proprietary, FIT files apparently can be read at least by
 321 <a href="https://www.gpsbabel.org">GPSBabel</a> and the
 322 <a href="https://apps.nextcloud.com/apps/gpxpod">GpxPod</a> Nextcloud
 323 app.  It is unclear to me if they can read step count and heart rate
 324 data.  The person I talked to was using a
 325 <a href="https://buy.garmin.com/en-US/US/p/564291">Garmin Forerunner
 326 935</a>, which is a fairly expensive unit.  I doubt it is worth it for
 327 a unit where the vendor clearly is trying its best to move from open
 328 to closed systems.  I still remember when Garmin dropped NMEA support
 329 in its GPSes.</p>
 330
 331 <p>A final idea was to build ones own unit, perhaps by basing it on a
 332 wearable hardware platforms like
 333 <a href="https://learn.adafruit.com/flora-geo-watch">the Flora Geo
 334 Watch</a>.  Sound like fun, but I had more money than time to spend on
 335 the topic, so I suspect it will have to wait for another time.</p>
 336
 337 <p>While I was working on tracking down links, I came across an
 338 inspiring TED talk by Dave Debronkart about
 339 <a href="https://archive.org/details/DavedeBronkart_2010X">being a
 340 e-patient</a>, and discovered the web site
 341 <a href="https://participatorymedicine.org/epatients/">Participatory
 342 Medicine</a>.  If you too want to track your own health and fitness
 343 without having information about your private life floating around on
 344 computers owned by others, I recommend checking it out.</p>
 345
 346 <p>As usual, if you use Bitcoin and want to show your support of my
 347 activities, please send Bitcoin donations to my address
 348 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 349 </div>
 350       <div class="tags">
 351
 352
 353         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 354
 355
 356       </div>
 357     </div>
 358     <div class="padding"></div>
 359
 360     <div class="entry">
 361       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Privacy_respecting_health_monitor___fitness_tracker_.html">Privacy respecting health monitor / fitness tracker?</a></div>
 362       <div class="date"> 7th August 2018</div>
 363       <div class="body"><p>Dear lazyweb,</p>
 364
 365 <p>I wonder, is there a fitness tracker / health monitor available for
 366 sale today that respect the users privacy?  With this I mean a
 367 watch/bracelet capable of measuring pulse rate and other
 368 fitness/health related values (and by all means, also the correct time
 369 and location if possible), which is <strong>only</strong> provided for
 370 me to extract/read from the unit with computer without a radio beacon
 371 and Internet connection.  In other words, it do not depend on a cell
 372 phone app, and do make the measurements available via other peoples
 373 computer (aka "the cloud").  The collected data should be available
 374 using only free software.  I'm not interested in depending on some
 375 non-free software that will leave me high and dry some time in the
 376 future.  I've been unable to find any such unit.  I would like to buy
 377 it.  The ones I have seen for sale here in Norway are proud to report
 378 that they share my health data with strangers (aka "cloud enabled").
 379 Is there an alternative?  I'm not interested in giving money to people
 380 requiring me to accept "privacy terms" to allow myself to measure my
 381 own health.</p>
 382
 383 <p>As usual, if you use Bitcoin and want to show your support of my
 384 activities, please send Bitcoin donations to my address
 385 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 386 </div>
 387       <div class="tags">
 388
 389
 390         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 391
 392
 393       </div>
 394     </div>
 395     <div class="padding"></div>
 396
 397     <div class="entry">
 398       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Sharing_images_with_friends_and_family_using_RSS_and_EXIF_XMP_metadata.html">Sharing images with friends and family using RSS and EXIF/XMP metadata</a></div>
 399       <div class="date">31st July 2018</div>
 400       <div class="body"><p>For a while now, I have looked for a sensible way to share images
 401 with my family using a self hosted solution, as it is unacceptable to
 402 place images from my personal life under the control of strangers
 403 working for data hoarders like Google or Dropbox.  The last few days I
 404 have drafted an approach that might work out, and I would like to
 405 share it with you.  I would like to publish images on a server under
 406 my control, and point some Internet connected display units using some
 407 free and open standard to the images I published.  As my primary
 408 language is not limited to ASCII, I need to store metadata using
 409 UTF-8.  Many years ago, I hoped to find a digital photo frame capable
 410 of reading a RSS feed with image references (aka using the
 411 &lt;enclosure&gt; RSS tag), but was unable to find a current supplier
 412 of such frames.  In the end I gave up that approach.</p>
 413
 414 <p>Some months ago, I discovered that
 415 <a href="https://www.jwz.org/xscreensaver/">XScreensaver</a> is able to
 416 read images from a RSS feed, and used it to set up a screen saver on
 417 my home info screen, showing images from the Daily images feed from
 418 NASA.  This proved to work well.  More recently I discovered that
 419 <a href="https://kodi.tv">Kodi</a> (both using
 420 <a href="https://www.openelec.tv/">OpenELEC</a> and
 421 <a href="https://libreelec.tv">LibreELEC</a>) provide the
 422 <a href="https://github.com/grinsted/script.screensaver.feedreader">Feedreader</a>
 423 screen saver capable of reading a RSS feed with images and news.  For
 424 fun, I used it this summer to test Kodi on my parents TV by hooking up
 425 a Raspberry PI unit with LibreELEC, and wanted to provide them with a
 426 screen saver showing selected pictures from my selection.</p>
 427
 428 <p>Armed with motivation and a test photo frame, I set out to generate
 429 a RSS feed for the Kodi instance.  I adjusted my <a
 430 href="https://freedombox.org/">Freedombox</a> instance, created
 431 /var/www/html/privatepictures/, wrote a small Perl script to extract
 432 title and description metadata from the photo files and generate the
 433 RSS file.  I ended up using Perl instead of python, as the
 434 libimage-exiftool-perl Debian package seemed to handle the EXIF/XMP
 435 tags I ended up using, while python3-exif did not.  The relevant EXIF
 436 tags only support ASCII, so I had to find better alternatives.  XMP
 437 seem to have the support I need.</p>
 438
 439 <p>I am a bit unsure which EXIF/XMP tags to use, as I would like to
 440 use tags that can be easily added/updated using normal free software
 441 photo managing software.  I ended up using the tags set using this
 442 exiftool command, as these tags can also be set using digiKam:</p>
 443
 444 <blockquote><pre>
 445 exiftool -headline='The RSS image title' \
 446   -description='The RSS image description.' \
 447   -subject+=for-family photo.jpeg
 448 </pre></blockquote>
 449
 450 <p>I initially tried the "-title" and "keyword" tags, but they were
 451 invisible in digiKam, so I changed to "-headline" and "-subject".  I
 452 use the keyword/subject 'for-family' to flag that the photo should be
 453 shared with my family.  Images with this keyword set are located and
 454 copied into my Freedombox for the RSS generating script to find.</p>
 455
 456 <p>Are there better ways to do this?  Get in touch if you have better
 457 suggestions.</p>
 458
 459 <p>As usual, if you use Bitcoin and want to show your support of my
 460 activities, please send Bitcoin donations to my address
 461 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 462 </div>
 463       <div class="tags">
 464
 465
 466         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 467
 468
 469       </div>
 470     </div>
 471     <div class="padding"></div>
 472
 473     <div class="entry">
 474       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Simple_streaming_the_Linux_desktop_to_Kodi_using_GStreamer_and_RTP.html">Simple streaming the Linux desktop to Kodi using GStreamer and RTP</a></div>
 475       <div class="date">12th July 2018</div>
 476       <div class="body"><p>Last night, I wrote
 477 <a href="http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html">a
 478 recipe to stream a Linux desktop using VLC to a instance of Kodi</a>.
 479 During the day I received valuable feedback, and thanks to the
 480 suggestions I have been able to rewrite the recipe into a much simpler
 481 approach requiring no setup at all.  It is a single script that take
 482 care of it all.</p>
 483
 484 <p>This new script uses GStreamer instead of VLC to capture the
 485 desktop and stream it to Kodi.  This fixed the video quality issue I
 486 saw initially.  It further removes the need to add a m3u file on the
 487 Kodi machine, as it instead connects to
 488 <a href="https://kodi.wiki/view/JSON-RPC_API/v8">the JSON-RPC API in
 489 Kodi</a> and simply ask Kodi to play from the stream created using
 490 GStreamer.  Streaming the desktop to Kodi now become trivial.  Copy
 491 the script below, run it with the DNS name or IP address of the kodi
 492 server to stream to as the only argument, and watch your screen show
 493 up on the Kodi screen.  Note, it depend on multicast on the local
 494 network, so if you need to stream outside the local network, the
 495 script must be modified.  Also note, I have no idea if audio work, as
 496 I only care about the picture part.</p>
 497
 498 <blockquote><pre>
 499 #!/bin/sh
 500 #
 501 # Stream the Linux desktop view to Kodi.  See
 502 # http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html
 503 # for backgorund information.
 504
 505 # Make sure the stream is stopped in Kodi and the gstreamer process is
 506 # killed if something go wrong (for example if curl is unable to find the
 507 # kodi server).  Do the same when interrupting this script.
 508 kodicmd() {
 509     host="$1"
 510     cmd="$2"
 511     params="$3"
 512     curl --silent --header 'Content-Type: application/json' \
 513          --data-binary "{ \"id\": 1, \"jsonrpc\": \"2.0\", \"method\": \"$cmd\", \"params\": $params }" \
 514          "http://$host/jsonrpc"
 515 }
 516 cleanup() {
 517     if [ -n "$kodihost" ] ; then
 518         # Stop the playing when we end
 519         playerid=$(kodicmd "$kodihost" Player.GetActivePlayers "{}" |
 520                             jq .result[].playerid)
 521         kodicmd "$kodihost" Player.Stop "{ \"playerid\" : $playerid }" > /dev/null
 522     fi
 523     if [ "$gstpid" ] && kill -0 "$gstpid" >/dev/null 2>&1; then
 524         kill "$gstpid"
 525     fi
 526 }
 527 trap cleanup EXIT INT
 528
 529 if [ -n "$1" ]; then
 530     kodihost=$1
 531     shift
 532 else
 533     kodihost=kodi.local
 534 fi
 535
 536 mcast=239.255.0.1
 537 mcastport=1234
 538 mcastttl=1
 539
 540 pasrc=$(pactl list | grep -A2 'Source #' | grep 'Name: .*\.monitor$' | \
 541   cut -d" " -f2|head -1)
 542 gst-launch-1.0 ximagesrc use-damage=0 ! video/x-raw,framerate=30/1 ! \
 543   videoconvert ! queue2 ! \
 544   x264enc bitrate=8000 speed-preset=superfast tune=zerolatency qp-min=30 \
 545   key-int-max=15 bframes=2 ! video/x-h264,profile=high ! queue2 ! \
 546   mpegtsmux alignment=7 name=mux ! rndbuffersize max=1316 min=1316 ! \
 547   udpsink host=$mcast port=$mcastport ttl-mc=$mcastttl auto-multicast=1 sync=0 \
 548   pulsesrc device=$pasrc ! audioconvert ! queue2 ! avenc_aac ! queue2 ! mux. \
 549   > /dev/null 2>&1 &
 550 gstpid=$!
 551
 552 # Give stream a second to get going
 553 sleep 1
 554
 555 # Ask kodi to start streaming using its JSON-RPC API
 556 kodicmd "$kodihost" Player.Open \
 557         "{\"item\": { \"file\": \"udp://@$mcast:$mcastport\" } }" > /dev/null
 558
 559 # wait for gst to end
 560 wait "$gstpid"
 561 </pre></blockquote>
 562
 563 <p>I hope you find the approach useful.  I know I do.</p>
 564
 565 <p>As usual, if you use Bitcoin and want to show your support of my
 566 activities, please send Bitcoin donations to my address
 567 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 568 </div>
 569       <div class="tags">
 570
 571
 572         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
 573
 574
 575       </div>
 576     </div>
 577     <div class="padding"></div>
 578
 579     <div class="entry">
 580       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html">Streaming the Linux desktop to Kodi using VLC and RTSP</a></div>
 581       <div class="date">12th July 2018</div>
 582       <div class="body"><p>PS: See
 583 <ahref="http://people.skolelinux.org/pere/blog/Simple_streaming_the_Linux_desktop_to_Kodi_using_GStreamer_and_RTP.html">the
 584 followup post</a> for a even better approach.</p>
 585
 586 <p>A while back, I was asked by a friend how to stream the desktop to
 587 my projector connected to Kodi.  I sadly had to admit that I had no
 588 idea, as it was a task I never had tried.  Since then, I have been
 589 looking for a way to do so, preferable without much extra software to
 590 install on either side.  Today I found a way that seem to kind of
 591 work.  Not great, but it is a start.</p>
 592
 593 <p>I had a look at several approaches, for example
 594 <a href="https://github.com/mfoetsch/dlna_live_streaming">using uPnP
 595 DLNA as described in 2011</a>, but it required a uPnP server, fuse and
 596 local storage enough to store the stream locally.  This is not going
 597 to work well for me, lacking enough free space, and it would
 598 impossible for my friend to get working.</p>
 599
 600 <p>Next, it occurred to me that perhaps I could use VLC to create a
 601 video stream that Kodi could play.  Preferably using
 602 broadcast/multicast, to avoid having to change any setup on the Kodi
 603 side when starting such stream.  Unfortunately, the only recipe I
 604 could find using multicast used the rtp protocol, and this protocol
 605 seem to not be supported by Kodi.</p>
 606
 607 <p>On the other hand, the rtsp protocol is working!  Unfortunately I
 608 have to specify the IP address of the streaming machine in both the
 609 sending command and the file on the Kodi server.  But it is showing my
 610 desktop, and thus allow us to have a shared look on the big screen at
 611 the programs I work on.</p>
 612
 613 <p>I did not spend much time investigating codeces.  I combined the
 614 rtp and rtsp recipes from
 615 <a href="https://wiki.videolan.org/Documentation:Streaming_HowTo/Command_Line_Examples/">the
 616 VLC Streaming HowTo/Command Line Examples</a>, and was able to get
 617 this working on the desktop/streaming end.</p>
 618
 619 <blockquote><pre>
 620 vlc screen:// --sout \
 621   '#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:rtp{dst=projector.local,port=1234,sdp=rtsp://192.168.11.4:8080/test.sdp}'
 622 </pre></blockquote>
 623
 624 <p>I ssh-ed into my Kodi box and created a file like this with the
 625 same IP address:</p>
 626
 627 <blockquote><pre>
 628 echo rtsp://192.168.11.4:8080/test.sdp \
 629   > /storage/videos/screenstream.m3u
 630 </pre></blockquote>
 631
 632 <p>Note the 192.168.11.4 IP address is my desktops IP address.  As far
 633 as I can tell the IP must be hardcoded for this to work.  In other
 634 words, if someone elses machine is going to do the steaming, you have
 635 to update screenstream.m3u on the Kodi machine and adjust the vlc
 636 recipe.  To get started, locate the file in Kodi and select the m3u
 637 file while the VLC stream is running.  The desktop then show up in my
 638 big screen. :)</p>
 639
 640 <p>When using the same technique to stream a video file with audio,
 641 the audio quality is really bad.  No idea if the problem is package
 642 loss or bad parameters for the transcode.  I do not know VLC nor Kodi
 643 enough to tell.</p>
 644
 645 <p><strong>Update 2018-07-12</strong>: Johannes Schauer send me a few
 646 succestions and reminded me about an important step.  The "screen:"
 647 input source is only available once the vlc-plugin-access-extra
 648 package is installed on Debian.  Without it, you will see this error
 649 message: "VLC is unable to open the MRL 'screen://'.  Check the log
 650 for details."  He further found that it is possible to drop some parts
 651 of the VLC command line to reduce the amount of hardcoded information.
 652 It is also useful to consider using cvlc to avoid having the VLC
 653 window in the desktop view.  In sum, this give us this command line on
 654 the source end
 655
 656 <blockquote><pre>
 657 cvlc screen:// --sout \
 658   '#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:rtp{sdp=rtsp://:8080/}'
 659 </pre></blockquote>
 660
 661 <p>and this on the Kodi end<p>
 662
 663 <blockquote><pre>
 664 echo rtsp://192.168.11.4:8080/ \
 665   > /storage/videos/screenstream.m3u
 666 </pre></blockquote>
 667
 668 <p>Still bad image quality, though.  But I did discover that streaming
 669 a DVD using dvdsimple:///dev/dvd as the source had excellent video and
 670 audio quality, so I guess the issue is in the input or transcoding
 671 parts, not the rtsp part.  I've tried to change the vb and ab
 672 parameters to use more bandwidth, but it did not make a
 673 difference.</p>
 674
 675 <p>I further received a suggestion from Einar Haraldseid to try using
 676 gstreamer instead of VLC, and this proved to work great!  He also
 677 provided me with the trick to get Kodi to use a multicast stream as
 678 its source.  By using this monstrous oneliner, I can stream my desktop
 679 with good video quality in reasonable framerate to the 239.255.0.1
 680 multicast address on port 1234:
 681
 682 <blockquote><pre>
 683 gst-launch-1.0 ximagesrc use-damage=0 ! video/x-raw,framerate=30/1 ! \
 684   videoconvert ! queue2 ! \
 685   x264enc bitrate=8000 speed-preset=superfast tune=zerolatency qp-min=30 \
 686   key-int-max=15 bframes=2 ! video/x-h264,profile=high ! queue2 ! \
 687   mpegtsmux alignment=7 name=mux ! rndbuffersize max=1316 min=1316 ! \
 688   udpsink host=239.255.0.1 port=1234 ttl-mc=1 auto-multicast=1 sync=0 \
 689   pulsesrc device=$(pactl list | grep -A2 'Source #' | \
 690     grep 'Name: .*\.monitor$' |  cut -d" " -f2|head -1) ! \
 691   audioconvert ! queue2 ! avenc_aac ! queue2 ! mux.
 692 </pre></blockquote>
 693
 694 <p>and this on the Kodi end<p>
 695
 696 <blockquote><pre>
 697 echo udp://@239.255.0.1:1234 \
 698   > /storage/videos/screenstream.m3u
 699 </pre></blockquote>
 700
 701 <p>Note the trick to pick a valid pulseaudio source.  It might not
 702 pick the one you need.  This approach will of course lead to trouble
 703 if more than one source uses the same multicast port and address.
 704 Note the ttl-mc=1 setting, which limit the multicast packages to the
 705 local network.  If the value is increased, your screen will be
 706 broadcasted further, one network "hop" for each increase (read up on
 707 multicast to learn more. :)!</p>
 708
 709 <p>Having cracked how to get Kodi to receive multicast streams, I
 710 could use this VLC command to stream to the same multicast address.
 711 The image quality is way better than the rtsp approach, but gstreamer
 712 seem to be doing a better job.</p>
 713
 714 <blockquote><pre>
 715 cvlc screen:// --sout '#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:rtp{mux=ts,dst=239.255.0.1,port=1234,sdp=sap}'
 716 </pre></blockquote>
 717
 718 <p>As usual, if you use Bitcoin and want to show your support of my
 719 activities, please send Bitcoin donations to my address
 720 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 721 </div>
 722       <div class="tags">
 723
 724
 725         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
 726
 727
 728       </div>
 729     </div>
 730     <div class="padding"></div>
 731
 732     <div class="entry">
 733       <div class="title"><a href="http://people.skolelinux.org/pere/blog/What_is_the_most_supported_MIME_type_in_Debian_in_2018_.html">What is the most supported MIME type in Debian in 2018?</a></div>
 734       <div class="date"> 9th July 2018</div>
 735       <div class="body"><p>Five years ago,
 736 <a href="http://people.skolelinux.org/pere/blog/What_is_the_most_supported_MIME_type_in_Debian_.html">I
 737 measured what the most supported MIME type in Debian was</a>, by
 738 analysing the desktop files in all packages in the archive.  Since
 739 then, the DEP-11 AppStream system has been put into production, making
 740 the task a lot easier.  This made me want to repeat the measurement,
 741 to see how much things changed.  Here are the new numbers, for
 742 unstable only this time:
 743
 744 <p><strong>Debian Unstable:</strong></p>
 745
 746 <pre>
 747   count MIME type
 748   ----- -----------------------
 749      56 image/jpeg
 750      55 image/png
 751      49 image/tiff
 752      48 image/gif
 753      39 image/bmp
 754      38 text/plain
 755      37 audio/mpeg
 756      34 application/ogg
 757      33 audio/x-flac
 758      32 audio/x-mp3
 759      30 audio/x-wav
 760      30 audio/x-vorbis+ogg
 761      29 image/x-portable-pixmap
 762      27 inode/directory
 763      27 image/x-portable-bitmap
 764      27 audio/x-mpeg
 765      26 application/x-ogg
 766      25 audio/x-mpegurl
 767      25 audio/ogg
 768      24 text/html
 769 </pre>
 770
 771 <p>The list was created like this using a sid chroot: "cat
 772 /var/lib/apt/lists/*sid*_dep11_Components-amd64.yml.gz| zcat | awk '/^
 773 - \S+\/\S+$/ {print $2 }' | sort | uniq -c | sort -nr | head -20"</p>
 774
 775 <p>It is interesting to see how image formats have passed text/plain
 776 as the most announced supported MIME type.  These days, thanks to the
 777 AppStream system, if you run into a file format you do not know, and
 778 want to figure out which packages support the format, you can find the
 779 MIME type of the file using "file --mime &lt;filename&gt;", and then
 780 look up all packages announcing support for this format in their
 781 AppStream metadata (XML or .desktop file) using "appstreamcli
 782 what-provides mimetype &lt;mime-type&gt;.  For example if you, like
 783 me, want to know which packages support inode/directory, you can get a
 784 list like this:</p>
 785
 786 <p><blockquote><pre>
 787 % appstreamcli what-provides mimetype inode/directory | grep Package: | sort
 788 Package: anjuta
 789 Package: audacious
 790 Package: baobab
 791 Package: cervisia
 792 Package: chirp
 793 Package: dolphin
 794 Package: doublecmd-common
 795 Package: easytag
 796 Package: enlightenment
 797 Package: ephoto
 798 Package: filelight
 799 Package: gwenview
 800 Package: k4dirstat
 801 Package: kaffeine
 802 Package: kdesvn
 803 Package: kid3
 804 Package: kid3-qt
 805 Package: nautilus
 806 Package: nemo
 807 Package: pcmanfm
 808 Package: pcmanfm-qt
 809 Package: qweborf
 810 Package: ranger
 811 Package: sirikali
 812 Package: spacefm
 813 Package: spacefm
 814 Package: vifm
 815 %
 816 </pre></blockquote></p>
 817
 818 <p>Using the same method, I can quickly discover that the Sketchup file
 819 format is not yet supported by any package in Debian:</p>
 820
 821 <p><blockquote><pre>
 822 % appstreamcli what-provides mimetype  application/vnd.sketchup.skp
 823 Could not find component providing 'mimetype::application/vnd.sketchup.skp'.
 824 %
 825 </pre></blockquote></p>
 826
 827 <p>Yesterday I used it to figure out which packages support the STL 3D
 828 format:</p>
 829
 830 <p><blockquote><pre>
 831 % appstreamcli what-provides mimetype  application/sla|grep Package
 832 Package: cura
 833 Package: meshlab
 834 Package: printrun
 835 %
 836 </pre></blockquote></p>
 837
 838 <p>PS: A new version of Cura was uploaded to Debian yesterday.</p>
 839
 840 <p>As usual, if you use Bitcoin and want to show your support of my
 841 activities, please send Bitcoin donations to my address
 842 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 843 </div>
 844       <div class="tags">
 845
 846
 847         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram</a>.
 848
 849
 850       </div>
 851     </div>
 852     <div class="padding"></div>
 853
 854     <p style="text-align: right;"><a href="index.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS feed" width="36" height="14" /></a></p>
 855     <div id="sidebar">
 856
 857
 858
 859 <h2>Archive</h2>
 860 <ul>
 861
 862 <li>2018
 863 <ul>
 864
 865 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 866
 867 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 868
 869 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 870
 871 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 872
 873 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 874
 875 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 876
 877 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 878
 879 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 880
 881 </ul></li>
 882
 883 <li>2017
 884 <ul>
 885
 886 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 887
 888 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 889
 890 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 891
 892 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 893
 894 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 895
 896 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 897
 898 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 899
 900 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 901
 902 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 903
 904 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 905
 906 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 907
 908 </ul></li>
 909
 910 <li>2016
 911 <ul>
 912
 913 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 914
 915 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 916
 917 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 918
 919 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 920
 921 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 922
 923 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 924
 925 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 926
 927 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 928
 929 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 930
 931 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 932
 933 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 934
 935 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 936
 937 </ul></li>
 938
 939 <li>2015
 940 <ul>
 941
 942 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 943
 944 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 945
 946 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 947
 948 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 949
 950 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 951
 952 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 953
 954 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 955
 956 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 957
 958 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 959
 960 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 961
 962 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 963
 964 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 965
 966 </ul></li>
 967
 968 <li>2014
 969 <ul>
 970
 971 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 972
 973 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 974
 975 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 976
 977 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 978
 979 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 980
 981 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 982
 983 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 984
 985 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 986
 987 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 988
 989 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 990
 991 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 992
 993 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 994
 995 </ul></li>
 996
 997 <li>2013
 998 <ul>
 999
1000 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
1001
1002 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
1003
1004 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
1005
1006 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
1007
1008 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
1009
1010 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
1011
1012 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
1013
1014 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
1015
1016 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
1017
1018 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
1019
1020 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
1021
1022 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
1023
1024 </ul></li>
1025
1026 <li>2012
1027 <ul>
1028
1029 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
1030
1031 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
1032
1033 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
1034
1035 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
1036
1037 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
1038
1039 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
1040
1041 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
1042
1043 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
1044
1045 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
1046
1047 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
1048
1049 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
1050
1051 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
1052
1053 </ul></li>
1054
1055 <li>2011
1056 <ul>
1057
1058 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
1059
1060 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
1061
1062 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
1063
1064 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
1065
1066 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
1067
1068 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
1069
1070 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
1071
1072 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
1073
1074 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
1075
1076 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
1077
1078 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
1079
1080 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
1081
1082 </ul></li>
1083
1084 <li>2010
1085 <ul>
1086
1087 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
1088
1089 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
1090
1091 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
1092
1093 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
1094
1095 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
1096
1097 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
1098
1099 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
1100
1101 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
1102
1103 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
1104
1105 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
1106
1107 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
1108
1109 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
1110
1111 </ul></li>
1112
1113 <li>2009
1114 <ul>
1115
1116 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
1117
1118 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
1119
1120 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
1121
1122 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
1123
1124 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
1125
1126 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
1127
1128 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
1129
1130 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
1131
1132 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
1133
1134 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
1135
1136 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
1137
1138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
1139
1140 </ul></li>
1141
1142 <li>2008
1143 <ul>
1144
1145 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
1146
1147 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
1148
1149 </ul></li>
1150
1151 </ul>
1152
1153
1154
1155 <h2>Tags</h2>
1156 <ul>
1157
1158  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
1159
1160  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
1161
1162  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
1163
1164  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
1165
1166  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (10)</a></li>
1167
1168  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
1169
1170  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
1171
1172  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
1173
1174  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (162)</a></li>
1175
1176  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
1177
1178  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
1179
1180  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
1181
1182  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
1183
1184  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (25)</a></li>
1185
1186  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
1187
1188  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (385)</a></li>
1189
1190  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
1191
1192  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (13)</a></li>
1193
1194  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (32)</a></li>
1195
1196  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
1197
1198  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
1199
1200  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
1201
1202  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
1203
1204  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
1205
1206  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
1207
1208  <li><a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi (3)</a></li>
1209
1210  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
1211
1212  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
1213
1214  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
1215
1216  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
1217
1218  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1219
1220  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
1221
1222  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (41)</a></li>
1223
1224  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (10)</a></li>
1225
1226  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (299)</a></li>
1227
1228  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (190)</a></li>
1229
1230  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
1231
1232  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1233
1234  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (72)</a></li>
1235
1236  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (107)</a></li>
1237
1238  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
1239
1240  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
1241
1242  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1243
1244  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
1245
1246  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
1247
1248  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1249
1250  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (6)</a></li>
1251
1252  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1253
1254  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (54)</a></li>
1255
1256  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1257
1258  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
1259
1260  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
1261
1262  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
1263
1264  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
1265
1266  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (55)</a></li>
1267
1268  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
1269
1270  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
1271
1272  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
1273
1274  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (12)</a></li>
1275
1276  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (68)</a></li>
1277
1278  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1279
1280  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (41)</a></li>
1281
1282 </ul>
1283
1284
1285     </div>
1286     <p style="text-align: right">
1287  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
1288 </p>
1289
1290   </body>
1291 </html>