X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/897fa107b44a539e23fe582e9a4d1593e5a701f2..a8af0c8c20892a59d5ef8682dde4127e381b874a:/blog/index.rss diff --git a/blog/index.rss b/blog/index.rss index 265f56d0ab..085c7f3828 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -7,95 +7,85 @@ - A bit more on privacy respecting health monitor / fitness tracker - http://people.skolelinux.org/pere/blog/A_bit_more_on_privacy_respecting_health_monitor___fitness_tracker.html - http://people.skolelinux.org/pere/blog/A_bit_more_on_privacy_respecting_health_monitor___fitness_tracker.html - Mon, 13 Aug 2018 09:00:00 +0200 - <p>A few days ago, I wondered if there are any privacy respecting -health monitors and/or fitness trackers available for sale these days. -I would like to buy one, but do not want to share my personal data -with strangers, nor be forced to have a mobile phone to get data out -of the unit. I've received some ideas, and would like to share them -with you. - -One interesting data point was a pointer to a Free Software app for -Android called -<a href="https://github.com/Freeyourgadget/Gadgetbridge/">Gadgetbridge</a>. -It provide cloudless collection and storing of data from a variety of -trackers. Its -<a href="https://github.com/Freeyourgadget/Gadgetbridge/#supported-devices">list -of supported devices</a> is a good indicator for units where the -protocol is fairly open, as it is obviously being handled by Free -Software. Other units are reportedly encrypting the collected -information with their own public key, making sure only the vendor -cloud service is able to extract data from the unit. The people -contacting me about it said they were using -<a href="https://us.amazfit.com/shop/bip?variant=336750">Amazfit -Bip</a> and -<a href="http://www.xiaomimi6phone.com/xiaomi-mi-band-3-features-release-date-rumors/">Xiaomi -Band 3</a>.</p> - -<p>I also got a suggestion to look at some of the units from Garmin. -I was told their GPS watches can be connected via USB and show up as a -USB storage device with -<a href="https://www.gpsbabel.org/htmldoc-development/fmt_garmin_fit.html">Garmin -FIT files</a> containing the collected measurements. While -proprietary, FIT files apparently can be read at least by -<a href="https://www.gpsbabel.org">GPSBabel</a> and the -<a href="https://apps.nextcloud.com/apps/gpxpod">GpxPod</a> Nextcloud -app. It is unclear to me if they can read step count and heart rate -data. The person I talked to was using a Garmin -<a href="https://buy.garmin.com/en-US/US/p/564291">Garmin Forerunner -935</a>, which is a fairly expensive unit. I doubt it is worth it for -a unit where the vendor clearly is trying its best to move from open -to closed systems. I still remember when Garmin dropped NMEA support -in its GPSes.</p> - -<p>A final idea was to build ones own unit, perhaps by basing it on a -wearable hardware platforms like -<a href="https://learn.adafruit.com/flora-geo-watch">the Flora Geo -Watch</a>. Sound like fun, but I had more money than time to spend on -the topic, so I suspect it will have to wait for another time.</p> - -<p>While I was working on tracking down links, I came across an -inspiring TED talk by Dave Debronkart about -<a href="https://archive.org/details/DavedeBronkart_2010X">being a -e-patient</a>, and discovered the web site -<a href="https://participatorymedicine.org/epatients/">Participatory -Medicine</a>. If you too want to track your own health and fitness -without having information about your private life floating around on -computers owned by others, I recommend checking it out.</p> - -<p>As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> + CasparCG Server for TV broadcast playout in Debian + http://people.skolelinux.org/pere/blog/CasparCG_Server_for_TV_broadcast_playout_in_Debian.html + http://people.skolelinux.org/pere/blog/CasparCG_Server_for_TV_broadcast_playout_in_Debian.html + Tue, 15 Jan 2019 00:10:00 +0100 + <p>The layered video playout server created by Sveriges Television, +<a href="https://casparcg.com/">CasparCG Server</a>, entered Debian +today. This completes many months of work to get the source ready to +go into Debian. The first upload to the Debian NEW queue happened a +month ago, but the work upstream to prepare it for Debian started more +than two and a half month ago. So far +<a href="https://tracker.debian.org/pkg/casparcg-server">the +casparcg-server package</a> is only available for amd64, but I hope +this can be improved. The package is in contrib because it depend on +the <a href="https://tracker.debian.org/pkg/fdk-aac">non-free fdk-aac +library</a>. The Debian package lack support for streaming web pages +because Debian is missing CEF, Chromium Embedded Framework. CEF is +wanted by several packages in Debian. But because the Chromium source +is <a href="https://bugs.debian.org/893448">not available as a build +dependency</a>, it is not yet possible to upload CEF to Debian. I +hope this will change in the future.</p> + +<p>The reason I got involved is that +<a href="https://frikanalen.no/">the Norwegian open channel +Frikanalen</a> is starting to use CasparCG for our HD playout, and I +would like to have all the free software tools we use to run the TV +channel available as packages from the Debian project. The last +remaining piece in the puzzle is Open Broadcast Encoder, but it depend +on quite a lot of patched libraries which would have to be included in +Debian first.</p> - Privacy respecting health monitor / fitness tracker? - http://people.skolelinux.org/pere/blog/Privacy_respecting_health_monitor___fitness_tracker_.html - http://people.skolelinux.org/pere/blog/Privacy_respecting_health_monitor___fitness_tracker_.html - Tue, 7 Aug 2018 16:00:00 +0200 - <p>Dear lazyweb,</p> - -<p>I wonder, is there a fitness tracker / health monitor available for -sale today that respect the users privacy? With this I mean a -watch/bracelet capable of measuring pulse rate and other -fitness/health related values (and by all means, also the correct time -and location if possible), which is <strong>only</strong> provided for -me to extract/read from the unit with computer without a radio beacon -and Internet connection. In other words, it do not depend on a cell -phone app, and do make the measurements available via other peoples -computer (aka "the cloud"). The collected data should be available -using only free software. I'm not interested in depending on some -non-free software that will leave me high and dry some time in the -future. I've been unable to find any such unit. I would like to buy -it. The ones I have seen for sale here in Norway are proud to report -that they share my health data with strangers (aka "cloud enabled"). -Is there an alternative? I'm not interested in giving money to people -requiring me to accept "privacy terms" to allow myself to measure my -own health.</p> + Learn to program with Minetest on Debian + http://people.skolelinux.org/pere/blog/Learn_to_program_with_Minetest_on_Debian.html + http://people.skolelinux.org/pere/blog/Learn_to_program_with_Minetest_on_Debian.html + Sat, 15 Dec 2018 15:30:00 +0100 + <p>A fun way to learn how to program +<a href="https://www.python.org/">Python</a> is to follow the +instructions in the book +"<a href="https://nostarch.com/programwithminecraft">Learn to program +with Minecraft</a>", which introduces programming in Python to people +who like to play with Minecraft. The book uses a Python library to +talk to a TCP/IP socket with an API accepting build instructions and +providing information about the current players in a Minecraft world. +The TCP/IP API was first created for the Minecraft implementation for +Raspberry Pi, and has since been ported to some server versions of +Minecraft. The book contain recipes for those using Windows, MacOSX +and Raspian. But a little known fact is that you can follow the same +recipes using the free software construction game +<a href="https://minetest.net/">Minetest</a>.</p> + +<p>There is <a href="https://github.com/sprintingkiwi/pycraft_mod">a +Minetest module implementing the same API</a>, making it possible to +use the Python programs coded to talk to Minecraft with Minetest too. +I +<a href="https://ftp-master.debian.org/new/minetest-mod-pycraft_0.20%2Bgit20180331.0376a0a%2Bdfsg-1.html">uploaded +this module</a> to Debian two weeks ago, and as soon as it clears the +FTP masters NEW queue, learning to program Python with Minetest on +Debian will be a simple 'apt install' away. The Debian package is +maintained as part of the Debian Games team, and +<a href="https://salsa.debian.org/games-team/unfinished/minetest-mod-pycraft">the +packaging rules</a> are currently located under 'unfinished' on +Salsa.</p> + +<p>You will most likely need to install several of the Minetest +modules in Debian for the examples included with the library to work +well, as there are several blocks used by the example scripts that are +provided via modules in Minetest. Without the required blocks, a +simple stone block is used instead. My initial testing with a analog +clock did not get gold arms as instructed in the python library, but +instead used stone arms.</p> + +<p>I tried to find a way to add the API to the desktop version of +Minecraft, but were unable to find any working recipes. The +<a href="https://www.epiphanydigest.com/tag/minecraft-python-api/">recipes</a> +I <a href="https://github.com/kbsriram/mcpiapi">found</a> are only +working with a standalone Minecraft server setup. Are there any +options to use with the normal desktop version?</p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -104,68 +94,32 @@ activities, please send Bitcoin donations to my address - Sharing images with friends and family using RSS and EXIF/XMP metadata - http://people.skolelinux.org/pere/blog/Sharing_images_with_friends_and_family_using_RSS_and_EXIF_XMP_metadata.html - http://people.skolelinux.org/pere/blog/Sharing_images_with_friends_and_family_using_RSS_and_EXIF_XMP_metadata.html - Tue, 31 Jul 2018 23:30:00 +0200 - <p>For a while now, I have looked for a sensible way to share images -with my family using a self hosted solution, as it is unacceptable to -place images from my personal life under the control of strangers -working for data hoarders like Google or Dropbox. The last few days I -have drafted an approach that might work out, and I would like to -share it with you. I would like to publish images on a server under -my control, and point some Internet connected display units using some -free and open standard to the images I published. As my primary -language is not limited to ASCII, I need to store metadata using -UTF-8. Many years ago, I hoped to find a digital photo frame capable -of reading a RSS feed with image references (aka using the -&lt;enclosure&gt; RSS tag), but was unable to find a current supplier -of such frames. In the end I gave up that approach.</p> - -<p>Some months ago, I discovered that -<a href="https://www.jwz.org/xscreensaver/">XScreensaver</a> is able to -read images from a RSS feed, and used it to set up a screen saver on -my home info screen, showing images from the Daily images feed from -NASA. This proved to work well. More recently I discovered that -<a href="https://kodi.tv">Kodi</a> (both using -<a href="https://www.openelec.tv/">OpenELEC</a> and -<a href="https://libreelec.tv">LibreELEC</a>) provide the -<a href="https://github.com/grinsted/script.screensaver.feedreader">Feedreader</a> -screen saver capable of reading a RSS feed with images and news. For -fun, I used it this summer to test Kodi on my parents TV by hooking up -a Raspberry PI unit with LibreELEC, and wanted to provide them with a -screen saver showing selected pictures from my selection.</p> - -<p>Armed with motivation and a test photo frame, I set out to generate -a RSS feed for the Kodi instance. I adjusted my <a -href="https://freedombox.org/">Freedombox</a> instance, created -/var/www/html/privatepictures/, wrote a small Perl script to extract -title and description metadata from the photo files and generate the -RSS file. I ended up using Perl instead of python, as the -libimage-exiftool-perl Debian package seemed to handle the EXIF/XMP -tags I ended up using, while python3-exif did not. The relevant EXIF -tags only support ASCII, so I had to find better alternatives. XMP -seem to have the support I need.</p> - -<p>I am a bit unsure which EXIF/XMP tags to use, as I would like to -use tags that can be easily added/updated using normal free software -photo managing software. I ended up using the tags set using this -exiftool command, as these tags can also be set using digiKam:</p> - -<blockquote><pre> -exiftool -headline='The RSS image title' \ - -description='The RSS image description.' \ - -subject+=for-family photo.jpeg -</pre></blockquote> - -<p>I initially tried the "-title" and "keyword" tags, but they were -invisible in digiKam, so I changed to "-headline" and "-subject". I -use the keyword/subject 'for-family' to flag that the photo should be -shared with my family. Images with this keyword set are located and -copied into my Freedombox for the RSS generating script to find.</p> - -<p>Are there better ways to do this? Get in touch if you have better -suggestions.</p> + Non-blocking bittorrent plugin for vlc + http://people.skolelinux.org/pere/blog/Non_blocking_bittorrent_plugin_for_vlc.html + http://people.skolelinux.org/pere/blog/Non_blocking_bittorrent_plugin_for_vlc.html + Wed, 12 Dec 2018 07:20:00 +0100 + <p>A few hours ago, a new and improved version (2.4) of +<a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">the VLC +bittorrent plugin</a> was uploaded to Debian. This new version +include a complete rewrite of the bittorrent related code, which seem +to make the plugin non-blocking. This mean you can actually exit VLC +even when the plugin seem to be unable to get the bittorrent streaming +started. The new version also include support for filtering playlist +by file extension using command line options, if you want to avoid +processing audio, video or images. The package is currently in Debian +unstable, but should be available in Debian testing in two days. To +test it, simply install it like this:</p> + +<p><pre> +apt install vlc-plugin-bittorrent +</pre></p> + +<p>After it is installed, you can try to use it to play a file +downloaded live via bittorrent like this: + +<p><pre> +vlc https://archive.org/download/Glass_201703/Glass_201703_archive.torrent +</pre></p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -174,245 +128,88 @@ activities, please send Bitcoin donations to my address - Simple streaming the Linux desktop to Kodi using GStreamer and RTP - http://people.skolelinux.org/pere/blog/Simple_streaming_the_Linux_desktop_to_Kodi_using_GStreamer_and_RTP.html - http://people.skolelinux.org/pere/blog/Simple_streaming_the_Linux_desktop_to_Kodi_using_GStreamer_and_RTP.html - Thu, 12 Jul 2018 17:55:00 +0200 - <p>Last night, I wrote -<a href="http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html">a -recipe to stream a Linux desktop using VLC to a instance of Kodi</a>. -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.</p> - -<p>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 -<a href="https://kodi.wiki/view/JSON-RPC_API/v8">the JSON-RPC API in -Kodi</a> 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. Also note, I have no idea if audio work, as -I only care about the picture part.</p> - -<blockquote><pre> -#!/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" -</pre></blockquote> - -<p>I hope you find the approach useful. I know I do.</p> - -<p>As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> + Retten til kontant betaling er en rettighet som må brukes for å beholdes + http://people.skolelinux.org/pere/blog/Retten_til_kontant_betaling_er_en_rettighet_som_m__brukes_for___beholdes.html + http://people.skolelinux.org/pere/blog/Retten_til_kontant_betaling_er_en_rettighet_som_m__brukes_for___beholdes.html + Tue, 11 Dec 2018 10:00:00 +0100 + <p><a href="https://www.fn.no/Om-FN/Avtaler/Menneskerettigheter/FNs-verdenserklaering-om-menneskerettigheter">FNs +menneskerettighetserklæring</a> artikkel 13 første punkt lyder som +følger:</p> + +<p><blockquote> +Enhver har rett til å bevege seg fritt og til fritt å velge +oppholdssted innenfor en stats grenser. +</blockquote></p> + +<p>Det er altså en menneskerett å kunne bevege seg fritt i landet. +For å bevege seg fritt i landet, så må en kunne bevege seg uten å bli +sporet. Det vil i dagens samfunn innebære å bevege seg uten å legge +igjen digitale spor og uten å være radiomerket. Hvis en vet at ens +bevegelser, hvor en befinner seg når, og hvem som befinner seg i +nærheten, blir samlet inn og gjort tilgjengelig for fremmede, det være +seg myndighetene eller private organisasjoner, så kan en ikke lenger +bevege seg fritt. Dette gjør at det er en forutsetning for å ha glede +av retten til å bevege seg fritt i landet at en motstår fristelsen til +å legge igjen digitale spor når en betaler for seg. Rettigheter som +ikke blir brukt, blir fjernet. Den eneste måten i dag å unngå å legge +igjen digitale spor når en betaler for seg, er å betale med kontanter, +samt takke nei til å legge igjen navn og adresse (slik f.eks. Elkjøp +ber om &mdash; jeg sier de kan legge inn «anonym anonym» når +datasystemet deres trenger et navn). Personlig anbefaler jeg å +konsekvent bruke kontant betaling når man beveger seg rundt, for å +bidra til forsvaret av menneskerettighetene i Norge. Kanskje noe også +for deg? Merk at det ikke er tilstrekkelig for å unngå sporing å +betale med kontanter, men det er et lite steg i riktig retning.</p> + +<p>Det er flere andre argumenter i tillegg til +menneskerettighetsargumentet for å bruke kontanter. I går hadde +Dagbladet en utmerket kommentar av sin journalist John Olav Egeland om +hvilket +<a href="https://www.dagbladet.no/kultur/kontantlost-diktatur/70543434">kontantløst +diktatur</a> som venter oss hvis mange nok slutter å insistere på å +betale med kontanter. Jeg anbefaler deg å lese den.</p> + +<p>Som vanlig, hvis du bruker Bitcoin og ønsker å vise din støtte til +det jeg driver med, setter jeg pris på om du sender Bitcoin-donasjoner +til min adresse +<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>. +Merk, betaling med bitcoin er ikke anonymt. :)</p> - Streaming the Linux desktop to Kodi using VLC and RTSP - http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html - http://people.skolelinux.org/pere/blog/Streaming_the_Linux_desktop_to_Kodi_using_VLC_and_RTSP.html - Thu, 12 Jul 2018 02:00:00 +0200 - <p>PS: See -<ahref="http://people.skolelinux.org/pere/blog/Simple_streaming_the_Linux_desktop_to_Kodi_using_GStreamer_and_RTP.html">the -followup post</a> for a even better approach.</p> - -<p>A while back, I was asked by a friend how to stream the desktop to -my projector connected to Kodi. I sadly had to admit that I had no -idea, as it was a task I never had tried. Since then, I have been -looking for a way to do so, preferable without much extra software to -install on either side. Today I found a way that seem to kind of -work. Not great, but it is a start.</p> - -<p>I had a look at several approaches, for example -<a href="https://github.com/mfoetsch/dlna_live_streaming">using uPnP -DLNA as described in 2011</a>, but it required a uPnP server, fuse and -local storage enough to store the stream locally. This is not going -to work well for me, lacking enough free space, and it would -impossible for my friend to get working.</p> - -<p>Next, it occurred to me that perhaps I could use VLC to create a -video stream that Kodi could play. Preferably using -broadcast/multicast, to avoid having to change any setup on the Kodi -side when starting such stream. Unfortunately, the only recipe I -could find using multicast used the rtp protocol, and this protocol -seem to not be supported by Kodi.</p> - -<p>On the other hand, the rtsp protocol is working! Unfortunately I -have to specify the IP address of the streaming machine in both the -sending command and the file on the Kodi server. But it is showing my -desktop, and thus allow us to have a shared look on the big screen at -the programs I work on.</p> - -<p>I did not spend much time investigating codeces. I combined the -rtp and rtsp recipes from -<a href="https://wiki.videolan.org/Documentation:Streaming_HowTo/Command_Line_Examples/">the -VLC Streaming HowTo/Command Line Examples</a>, and was able to get -this working on the desktop/streaming end.</p> - -<blockquote><pre> -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}' -</pre></blockquote> - -<p>I ssh-ed into my Kodi box and created a file like this with the -same IP address:</p> - -<blockquote><pre> -echo rtsp://192.168.11.4:8080/test.sdp \ - > /storage/videos/screenstream.m3u -</pre></blockquote> - -<p>Note the 192.168.11.4 IP address is my desktops IP address. As far -as I can tell the IP must be hardcoded for this to work. In other -words, if someone elses machine is going to do the steaming, you have -to update screenstream.m3u on the Kodi machine and adjust the vlc -recipe. To get started, locate the file in Kodi and select the m3u -file while the VLC stream is running. The desktop then show up in my -big screen. :)</p> - -<p>When using the same technique to stream a video file with audio, -the audio quality is really bad. No idea if the problem is package -loss or bad parameters for the transcode. I do not know VLC nor Kodi -enough to tell.</p> - -<p><strong>Update 2018-07-12</strong>: Johannes Schauer send me a few -succestions and reminded me about an important step. The "screen:" -input source is only available once the vlc-plugin-access-extra -package is installed on Debian. Without it, you will see this error -message: "VLC is unable to open the MRL 'screen://'. Check the log -for details." He further found that it is possible to drop some parts -of the VLC command line to reduce the amount of hardcoded information. -It is also useful to consider using cvlc to avoid having the VLC -window in the desktop view. In sum, this give us this command line on -the source end - -<blockquote><pre> -cvlc screen:// --sout \ - '#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:rtp{sdp=rtsp://:8080/}' -</pre></blockquote> - -<p>and this on the Kodi end<p> - -<blockquote><pre> -echo rtsp://192.168.11.4:8080/ \ - > /storage/videos/screenstream.m3u -</pre></blockquote> - -<p>Still bad image quality, though. But I did discover that streaming -a DVD using dvdsimple:///dev/dvd as the source had excellent video and -audio quality, so I guess the issue is in the input or transcoding -parts, not the rtsp part. I've tried to change the vb and ab -parameters to use more bandwidth, but it did not make a -difference.</p> - -<p>I further received a suggestion from Einar Haraldseid to try using -gstreamer instead of VLC, and this proved to work great! He also -provided me with the trick to get Kodi to use a multicast stream as -its source. By using this monstrous oneliner, I can stream my desktop -with good video quality in reasonable framerate to the 239.255.0.1 -multicast address on port 1234: - -<blockquote><pre> -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. -</pre></blockquote> - -<p>and this on the Kodi end<p> - -<blockquote><pre> -echo udp://@239.255.0.1:1234 \ - > /storage/videos/screenstream.m3u -</pre></blockquote> - -<p>Note the trick to pick a valid pulseaudio source. It might not -pick the one you need. This approach will of course lead to trouble -if more than one source uses the same multicast port and address. -Note the ttl-mc=1 setting, which limit the multicast packages to the -local network. If the value is increased, your screen will be -broadcasted further, one network "hop" for each increase (read up on -multicast to learn more. :)!</p> - -<p>Having cracked how to get Kodi to receive multicast streams, I -could use this VLC command to stream to the same multicast address. -The image quality is way better than the rtsp approach, but gstreamer -seem to be doing a better job.</p> - -<blockquote><pre> -cvlc screen:// --sout '#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:rtp{mux=ts,dst=239.255.0.1,port=1234,sdp=sap}' -</pre></blockquote> + Why is your site not using Content Security Policy / CSP? + http://people.skolelinux.org/pere/blog/Why_is_your_site_not_using_Content_Security_Policy___CSP_.html + http://people.skolelinux.org/pere/blog/Why_is_your_site_not_using_Content_Security_Policy___CSP_.html + Sun, 9 Dec 2018 15:00:00 +0100 + <p>Yesterday, I had the pleasure of watching on Frikanalen the OWASP +talk by Scott Helme titled +"<a href="https://frikanalen.no/video/626080/">What We’ve Learned From +Billions of Security Reports</a>". I had not heard of the +<a href="https://en.wikipedia.org/wiki/Content_Security_Policy">Content +Security Policy standard</a> nor its ability to "call home" when a +browser detect a policy breach (I do not follow web page design +development much these days), and found the talk very illuminating.</p> + +<p>The mechanism allow a web site owner to use HTTP headers to tell +visitors web browser which sources (internal and external) are allowed to +be used on the web site. Thus it become possible to enforce a "only +local content" policy despite web designers urge to fetch programs +from random sites on the Internet, like the one +<a href="https://securityaffairs.co/wordpress/68966/hacking/browsealoud-plugin-hack.html">enabling +the attack</a> reported by Scott Helme earlier this year.</p> + +<p>Using CSP seem like an obvious thing for a site admin to implement +to take some control over the information leak that occur when +external sources are used to render web pages, it is a mystery more +sites are not using CSP? It is being +<a href="https://www.w3.org/TR/CSP/">standardized under W3C</a> these +days, and is supposed by most web browsers</p> + +<p>I managed to find <a href="https://github.com/mozilla/django-csp">a +Django middleware for implementing CSP</a> and was happy to discover +it was already in Debian. I plan to use it to add CSP support to the +Frikanalen web site soon.</p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -421,114 +218,39 @@ activities, please send Bitcoin donations to my address - What is the most supported MIME type in Debian in 2018? - http://people.skolelinux.org/pere/blog/What_is_the_most_supported_MIME_type_in_Debian_in_2018_.html - http://people.skolelinux.org/pere/blog/What_is_the_most_supported_MIME_type_in_Debian_in_2018_.html - Mon, 9 Jul 2018 08:05:00 +0200 - <p>Five years ago, -<a href="http://people.skolelinux.org/pere/blog/What_is_the_most_supported_MIME_type_in_Debian_.html">I -measured what the most supported MIME type in Debian was</a>, by -analysing the desktop files in all packages in the archive. Since -then, the DEP-11 AppStream system has been put into production, making -the task a lot easier. This made me want to repeat the measurement, -to see how much things changed. Here are the new numbers, for -unstable only this time: - -<p><strong>Debian Unstable:</strong></p> - -<pre> - count MIME type - ----- ----------------------- - 56 image/jpeg - 55 image/png - 49 image/tiff - 48 image/gif - 39 image/bmp - 38 text/plain - 37 audio/mpeg - 34 application/ogg - 33 audio/x-flac - 32 audio/x-mp3 - 30 audio/x-wav - 30 audio/x-vorbis+ogg - 29 image/x-portable-pixmap - 27 inode/directory - 27 image/x-portable-bitmap - 27 audio/x-mpeg - 26 application/x-ogg - 25 audio/x-mpegurl - 25 audio/ogg - 24 text/html -</pre> - -<p>The list was created like this using a sid chroot: "cat -/var/lib/apt/lists/*sid*_dep11_Components-amd64.yml.gz| zcat | awk '/^ -- \S+\/\S+$/ {print $2 }' | sort | uniq -c | sort -nr | head -20"</p> - -<p>It is interesting to see how image formats have passed text/plain -as the most announced supported MIME type. These days, thanks to the -AppStream system, if you run into a file format you do not know, and -want to figure out which packages support the format, you can find the -MIME type of the file using "file --mime &lt;filename&gt;", and then -look up all packages announcing support for this format in their -AppStream metadata (XML or .desktop file) using "appstreamcli -what-provides mimetype &lt;mime-type&gt;. For example if you, like -me, want to know which packages support inode/directory, you can get a -list like this:</p> - -<p><blockquote><pre> -% appstreamcli what-provides mimetype inode/directory | grep Package: | sort -Package: anjuta -Package: audacious -Package: baobab -Package: cervisia -Package: chirp -Package: dolphin -Package: doublecmd-common -Package: easytag -Package: enlightenment -Package: ephoto -Package: filelight -Package: gwenview -Package: k4dirstat -Package: kaffeine -Package: kdesvn -Package: kid3 -Package: kid3-qt -Package: nautilus -Package: nemo -Package: pcmanfm -Package: pcmanfm-qt -Package: qweborf -Package: ranger -Package: sirikali -Package: spacefm -Package: spacefm -Package: vifm -% -</pre></blockquote></p> - -<p>Using the same method, I can quickly discover that the Sketchup file -format is not yet supported by any package in Debian:</p> - -<p><blockquote><pre> -% appstreamcli what-provides mimetype application/vnd.sketchup.skp -Could not find component providing 'mimetype::application/vnd.sketchup.skp'. -% -</pre></blockquote></p> - -<p>Yesterday I used it to figure out which packages support the STL 3D -format:</p> - -<p><blockquote><pre> -% appstreamcli what-provides mimetype application/sla|grep Package -Package: cura -Package: meshlab -Package: printrun -% -</pre></blockquote></p> - -<p>PS: A new version of Cura was uploaded to Debian yesterday.</p> + New and improved Frikanalen Kodi addon version 0.0.3 + http://people.skolelinux.org/pere/blog/New_and_improved_Frikanalen_Kodi_addon_version_0_0_3.html + http://people.skolelinux.org/pere/blog/New_and_improved_Frikanalen_Kodi_addon_version_0_0_3.html + Thu, 8 Nov 2018 10:30:00 +0100 + <p>If you read my blog regularly, you probably know I am involved in +running and developing the <a href="https://frikanalen.no/">Norwegian +TV channel Frikanalen</a>. It is an open channel, allowing everyone +in Norway to publish videos on a TV channel with national coverage. +You can think of it as Youtube for national television. +In addition to distribution on RiksTV and Uninett, Frikanalen is also +available as a Kodi addon. The last few days I have updated the code +to add more features. A +<a href="https://kodi.tv/addon/plugins-video-add-ons/frikanalen-nett-tv">new +and improved version 0.0.3 Frikanalen addon</a> was just made +available via the Kodi repositories. This new version include a +option to browse videos by category, as well as free text search +in the video archive. It will now also show the video duration in the +video lists, which were missing earlier. A new and experimental +link to the HD video stream currently being worked on is provided, for +those that want to see what the <a href="https://casparcg.com/">CasparCG</a> +output look like. The alternative is the SD video stream, generated +using MLT. CasparCG is controlled by our +<a href="https://github.com/Frikanalen/mltplayout/">mltplayout +server</a> which instead of talking to mlt is giving PLAY instructions +to the CasparCG server when it is time to start a new program.</p> + +<p>By now, you are probably wondering what kind of content is being +played on the channel. These days, it is filled with technical +presentations like those from <a href="https://www.nuug.no/">NUUG</a>, +<a href="https://www.debconf.org/">Debconf</a>, Makercon, and TED, +but there are also some periods with +<a href="https://www.empo.no/">EMPT TV</a> and +<a href="https://www.p7.no/">P7</a>. <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -537,76 +259,35 @@ activities, please send Bitcoin donations to my address - Debian APT upgrade without enough free space on the disk... - http://people.skolelinux.org/pere/blog/Debian_APT_upgrade_without_enough_free_space_on_the_disk___.html - http://people.skolelinux.org/pere/blog/Debian_APT_upgrade_without_enough_free_space_on_the_disk___.html - Sun, 8 Jul 2018 12:10:00 +0200 - <p>Quite regularly, I let my Debian Sid/Unstable chroot stay untouch -for a while, and when I need to update it there is not enough free -space on the disk for apt to do a normal 'apt upgrade'. I normally -would resolve the issue by doing 'apt install &lt;somepackages&gt;' to -upgrade only some of the packages in one batch, until the amount of -packages to download fall below the amount of free space available. -Today, I had about 500 packages to upgrade, and after a while I got -tired of trying to install chunks of packages manually. I concluded -that I did not have the spare hours required to complete the task, and -decided to see if I could automate it. I came up with this small -script which I call 'apt-in-chunks':</p> - -<p><blockquote><pre> -#!/bin/sh -# -# Upgrade packages when the disk is too full to upgrade every -# upgradable package in one lump. Fetching packages to upgrade using -# apt, and then installing using dpkg, to avoid changing the package -# flag for manual/automatic. - -set -e - -ignore() { - if [ "$1" ]; then - grep -v "$1" - else - cat - fi -} - -for p in $(apt list --upgradable | ignore "$@" |cut -d/ -f1 | grep -v '^Listing...'); do - echo "Upgrading $p" - apt clean - apt install --download-only -y $p - for f in /var/cache/apt/archives/*.deb; do - if [ -e "$f" ]; then - dpkg -i /var/cache/apt/archives/*.deb - break - fi - done -done -</pre></blockquote></p> - -<p>The script will extract the list of packages to upgrade, try to -download the packages needed to upgrade one package, install the -downloaded packages using dpkg. The idea is to upgrade packages -without changing the APT mark for the package (ie the one recording of -the package was manually requested or pulled in as a dependency). To -use it, simply run it as root from the command line. If it fail, try -'apt install -f' to clean up the mess and run the script again. This -might happen if the new packages conflict with one of the old -packages. dpkg is unable to remove, while apt can do this.</p> - -<p>It take one option, a package to ignore in the list of packages to -upgrade. The option to ignore a package is there to be able to skip -the packages that are simply too large to unpack. Today this was -'ghc', but I have run into other large packages causing similar -problems earlier (like TeX).</p> - -<p>Update 2018-07-08: Thanks to Paul Wise, I am aware of two -alternative ways to handle this. The "unattended-upgrades ---minimal-upgrade-steps" option will try to calculate upgrade sets for -each package to upgrade, and then upgrade them in order, smallest set -first. It might be a better option than my above mentioned script. -Also, "aptutude upgrade" can upgrade single packages, thus avoiding -the need for using "dpkg -i" in the script above.</p> + Time for an official MIME type for patches? + http://people.skolelinux.org/pere/blog/Time_for_an_official_MIME_type_for_patches_.html + http://people.skolelinux.org/pere/blog/Time_for_an_official_MIME_type_for_patches_.html + Thu, 1 Nov 2018 08:15:00 +0100 + <p>As part of my involvement in +<a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core">the Nikita +archive API project</a>, I've been importing a fairly large lump of +emails into a test instance of the archive to see how well this would +go. I picked a subset of <a href="https://notmuchmail.org/">my +notmuch email database</a>, all public emails sent to me via +@lists.debian.org, giving me a set of around 216 000 emails to import. +In the process, I had a look at the various attachments included in +these emails, to figure out what to do with attachments, and noticed +that one of the most common attachment formats do not have +<a href="https://www.iana.org/assignments/media-types/media-types.xhtml">an +official MIME type</a> registered with IANA/IETF. The output from +diff, ie the input for patch, is on the top 10 list of formats +included in these emails. At the moment people seem to use either +text/x-patch or text/x-diff, but neither is officially registered. It +would be better if one official MIME type were registered and used +everywhere.</p> + +<p>To try to get one official MIME type for these files, I've brought +up the topic on +<a href="https://www.ietf.org/mailman/listinfo/media-types">the +media-types mailing list</a>. If you are interested in discussion +which MIME type to use as the official for patch files, or involved in +making software using a MIME type for patches, perhaps you would like +to join the discussion?</p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -615,25 +296,72 @@ activities, please send Bitcoin donations to my address - The worlds only stone power plant? - http://people.skolelinux.org/pere/blog/The_worlds_only_stone_power_plant_.html - http://people.skolelinux.org/pere/blog/The_worlds_only_stone_power_plant_.html - Sat, 30 Jun 2018 10:35:00 +0200 - <p>So far, at least hydro-electric power, coal power, wind power, -solar power, and wood power are well known. Until a few days ago, I -had never heard of stone power. Then I learn about a quarry in a -mountain in -<a href="https://en.wikipedia.org/wiki/Bremanger">Bremanger</a> i -Norway, where -<a href="https://www.bontrup.com/en/activities/raw-materials/bremanger-quarry/">the -Bremanger Quarry</a> company is extracting stone and dumping the stone -into a shaft leading to its shipping harbour. This downward movement -in this shaft is used to produce electricity. In short, it is using -falling rocks instead of falling water to produce electricity, and -according to its own statements it is producing more power than it is -using, and selling the surplus electricity to the Norwegian power -grid. I find the concept truly amazing. Is this the worlds only -stone power plant?</p> + Measuring the speaker frequency response using the AUDMES free software GUI - nice free software + http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html + http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html + Mon, 22 Oct 2018 08:40:00 +0200 + <p><img src="http://people.skolelinux.org/pere/blog/images/2018-10-22-audmes-measure-speakers.png" align="right" width="40%"/></p> + +<p>My current home stereo is a patchwork of various pieces I got on +flee markeds over the years. It is amazing what kind of equipment +show up there. I've been wondering for a while if it was possible to +measure how well this equipment is working together, and decided to +see how far I could get using free software. After trawling the web I +came across an article from DIY Audio and Video on +<a href="https://www.diyaudioandvideo.com/Tutorial/SpeakerResponseTesting/">Speaker +Testing and Analysis</a> describing how to test speakers, and it listing +several software options, among them +<a href="https://sourceforge.net/projects/audmes/">AUDio MEasurement +System (AUDMES)</a>. It is the only free software system I could find +focusing on measuring speakers and audio frequency response. In the +process I also found an interesting article from NOVO on +<a href="http://novo.press/understanding-speaker-specifications-and-frequency-response/">Understanding +Speaker Specifications and Frequency Response</a> and an article from +ecoustics on +<a href="https://www.ecoustics.com/articles/understanding-speaker-frequency-response/">Understanding +Speaker Frequency Response</a>, with a lot of information on what to +look for and how to interpret the graphs. Armed with this knowledge, +I set out to measure the state of my speakers.</p> + +<p>The first hurdle was that AUDMES hadn't seen a commit for 10 years +and did not build with current compilers and libraries. I got in +touch with its author, who no longer was spending time on the program +but gave me write access to the subversion repository on Sourceforge. +The end result is that now the code build on Linux and is capable of +saving and loading the collected frequency response data in CSV +format. The application is quite nice and flexible, and I was able to +select the input and output audio interfaces independently. This made +it possible to use a USB mixer as the input source, while sending +output via my laptop headphone connection. I lacked the hardware and +cabling to figure out a different way to get independent cabling to +speakers and microphone.</p> + +<p>Using this setup I could see how a large range of high frequencies +apparently were not making it out of my speakers. The picture show +the frequency response measurement of one of the speakers. Note the +frequency lines seem to be slightly misaligned, compared to the CSV +output from the program. I can not hear several of these are high +frequencies, according to measurement from +<a href="http://freehearingtestsoftware.com">Free Hearing Test +Software</a>, an freeware system to measure your hearing (still +looking for a free software alternative), so I do not know if they are +coming out out the speakers. I thus do not quite know how to figure +out if the missing frequencies is a problem with the microphone, the +amplifier or the speakers, but I managed to rule out the audio card in my +PC by measuring my Bose noise canceling headset using its own +microphone. This setup was able to see the high frequency tones, so +the problem with my stereo had to be in the amplifier or speakers.</p> + +<p>Anyway, to try to role out one factor I ended up picking up a new +set of speakers at a flee marked, and these work a lot better than the +old speakers, so I guess the microphone and amplifier is OK. If you +need to measure your own speakers, check out AUDMES. If more people +get involved, perhaps the project could become good enough to +<a href="https://bugs.debian.org/910876">include in Debian</a>? And if +you know of some other free software to measure speakers and amplifier +performance, please let me know. I am aware of the freeware option +<a href="https://www.roomeqwizard.com/">REW</a>, but I want something +that can be developed also when the vendor looses interest.</p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -642,59 +370,60 @@ activities, please send Bitcoin donations to my address - Add-on to control the projector from within Kodi - http://people.skolelinux.org/pere/blog/Add_on_to_control_the_projector_from_within_Kodi.html - http://people.skolelinux.org/pere/blog/Add_on_to_control_the_projector_from_within_Kodi.html - Tue, 26 Jun 2018 23:55:00 +0200 - <p>My movie playing setup involve <a href="https://kodi.tv/">Kodi</a>, -<a href="https://openelec.tv">OpenELEC</a> (probably soon to be -replaced with <a href="https://libreelec.tv/">LibreELEC</a>) and an -Infocus IN76 video projector. My projector can be controlled via both -a infrared remote controller, and a RS-232 serial line. The vendor of -my projector, <a href="https://www.infocus.com/">InFocus</a>, had been -sensible enough to document the serial protocol in its user manual, so -it is easily available, and I used it some years ago to write -<a href="https://github.com/petterreinholdtsen/infocus-projector-control">a -small script to control the projector</a>. For a while now, I longed -for a setup where the projector was controlled by Kodi, for example in -such a way that when the screen saver went on, the projector was -turned off, and when the screen saver exited, the projector was turned -on again.</p> - -<p>A few days ago, with very good help from parts of my family, I -managed to find a Kodi Add-on for controlling a Epson projector, and -got in touch with its author to see if we could join forces and make a -Add-on with support for several projectors. To my pleasure, he was -positive to the idea, and we set out to add InFocus support to his -add-on, and make the add-on suitable for the official Kodi add-on -repository.</p> - -<p>The Add-on is now working (for me, at least), with a few minor -adjustments. The most important change I do relative to the master -branch in the github repository is embedding the -<a href="https://github.com/pyserial/pyserial">pyserial module</a> in -the add-on. The long term solution is to make a "script" type -pyserial module for Kodi, that can be pulled in as a dependency in -Kodi. But until that in place, I embed it.</p> - -<p>The add-on can be configured to turn on the projector when Kodi -starts, off when Kodi stops as well as turn the projector off when the -screensaver start and on when the screesaver stops. It can also be -told to set the projector source when turning on the projector. - -<p>If this sound interesting to you, check out -<a href="https://github.com/fredrik-eriksson/kodi_projcontrol">the -project github repository</a>. Perhaps you can send patches to -support your projector too? As soon as we find time to wrap up the -latest changes, it should be available for easy installation using any -Kodi instance.</p> - -<p>For future improvements, I would like to add projector model -detection and the ability to adjust the brightness level of the -projector from within Kodi. We also need to figure out how to handle -the cooling period of the projector. My projector refuses to turn on -for 60 seconds after it was turned off. This is not handled well by -the add-on at the moment.</p> + Web browser integration of VLC with Bittorrent support + http://people.skolelinux.org/pere/blog/Web_browser_integration_of_VLC_with_Bittorrent_support.html + http://people.skolelinux.org/pere/blog/Web_browser_integration_of_VLC_with_Bittorrent_support.html + Sun, 21 Oct 2018 09:50:00 +0200 + <p>Bittorrent is as far as I know, currently the most efficient way to +distribute content on the Internet. It is used all by all sorts of +content providers, from national TV stations like +<a href="https://www.nrk.no/">NRK</a>, Linux distributors like +<a href="https://www.debian.org/">Debian</a> and +<a href="https://www.ubuntu.com/">Ubuntu</a>, and of course the +<a href="https://archive.org/">Internet archive</A>. + +<p>Almost a month ago +<a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">a new +package adding Bittorrent support to VLC</a> became available in +Debian testing and unstable. To test it, simply install it like +this:</p> + +<p><pre> +apt install vlc-plugin-bittorrent +</pre></p> + +<p>Since the plugin was made available for the first time in Debian, +several improvements have been made to it. In version 2.2-4, now +available in both testing and unstable, a desktop file is provided to +teach browsers to start VLC when the user click on torrent files or +magnet links. The last part is thanks to me finally understanding +what the strange x-scheme-handler style MIME types in desktop files +are used for. By adding x-scheme-handler/magnet to the MimeType entry +in the desktop file, at least the browsers Firefox and Chromium will +suggest to start VLC when selecting a magnet URI on a web page. The +end result is that now, with the plugin installed in Buster and Sid, +one can visit any +<a href="https://archive.org/details/CopyingIsNotTheft1080p">Internet +Archive page with movies</a> using a web browser and click on the +torrent link to start streaming the movie.</p> + +<p>Note, there is still some misfeatures in the plugin. One is the +fact that it will hang and +<a href="https://github.com/johang/vlc-bittorrent/issues/13">block VLC +from exiting until the torrent streaming starts</a>. Another is the +fact that it +<a href="https://github.com/johang/vlc-bittorrent/issues/9">will pick +and play a random file in a multi file torrent</a>. This is not +always the video file you want. Combined with the first it can be a +bit hard to get the video streaming going. But when it work, it seem +to do a good job.</p> + +<p>For the Debian packaging, I would love to find a good way to test +if the plugin work with VLC using autopkgtest. I tried, but do not +know enough of the inner workings of VLC to get it working. For now +the autopkgtest script is only checking if the .so file was +successfully loaded by VLC. If you have any suggestions, please +submit a patch to the Debian bug tracking system.</p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -703,68 +432,77 @@ activities, please send Bitcoin donations to my address - youtube-dl for nedlasting fra NRK med undertekster - nice free software - http://people.skolelinux.org/pere/blog/youtube_dl_for_nedlasting_fra_NRK_med_undertekster___nice_free_software.html - http://people.skolelinux.org/pere/blog/youtube_dl_for_nedlasting_fra_NRK_med_undertekster___nice_free_software.html - Sat, 28 Apr 2018 10:30:00 +0200 - <p>I <a href="https://no.wikipedia.org/wiki/VHS">VHS-kassettenes</a> -tid var det rett frem å ta vare på et TV-program en ønsket å kunne se -senere, uten å være avhengig av at programmet ble sendt på nytt. -Kanskje ønsket en å se programmet på hytten der det ikke var -TV-signal, eller av andre grunner ha det tilgjengelig for fremtidig -fornøyelse. Dette er blitt vanskeligere med introduksjon av -digital-TV og webstreaming, der opptak til harddisk er utenfor de -flestes kontroll hvis de bruker ufri programvare og bokser kontrollert -av andre. Men for NRK her i Norge, finnes det heldigvis flere fri -programvare-alternativer, som jeg har -<a href="http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK.html">skrevet</a> -<a href="http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK_med_den__nye__l_sningen.html">om</a> -<a href="http://people.skolelinux.org/pere/blog/Nedlasting_fra_NRK__som_Matroska_med_undertekster.html">før</a>. -Så lenge kilden for nedlastingen er lovlig lagt ut på nett (hvilket -jeg antar NRK gjør), så er slik lagring til privat bruk også lovlig i -Norge.</p> - -<p>Sist jeg så på saken, i 2016, nevnte jeg at -<a href="https://rg3.github.com/youtube-dl/">youtube-dl</a> ikke kunne -bake undertekster fra NRK inn i videofilene, og at jeg derfor -foretrakk andre alternativer. Nylig oppdaget jeg at dette har endret -seg. Fordelen med youtube-dl er at den er tilgjengelig direkte fra -Linux-distribusjoner som <a href="https://www.debian.org/">Debian</a> -og <a href="https://www.ubuntu.com/">Ubuntu</a>, slik at en slipper å -finne ut selv hvordan en skal få dem til å virke.</p> - -<p>For å laste ned et NRK-innslag med undertekster, og få den norske -underteksten pakket inn i videofilen, så kan følgende kommando -brukes:</p> + Release 0.2 of free software archive system Nikita announced + http://people.skolelinux.org/pere/blog/Release_0_2_of_free_software_archive_system_Nikita_announced.html + http://people.skolelinux.org/pere/blog/Release_0_2_of_free_software_archive_system_Nikita_announced.html + Thu, 18 Oct 2018 14:40:00 +0200 + <p>This morning, the new release of the +<a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core/">Nikita +Noark 5 core project</a> was +<a href="https://lists.nuug.no/pipermail/nikita-noark/2018-October/000406.html">announced +on the project mailing list</a>. The free software solution is an +implementation of the Norwegian archive standard Noark 5 used by +government offices in Norway. These were the changes in version 0.2 +since version 0.1.1 (from NEWS.md): + +<ul> + <li>Fix typos in REL names</li> + <li>Tidy up error message reporting</li> + <li>Fix issue where we used Integer.valueOf(), not Integer.getInteger()</li> + <li>Change some String handling to StringBuffer</li> + <li>Fix error reporting</li> + <li>Code tidy-up</li> + <li>Fix issue using static non-synchronized SimpleDateFormat to avoid + race conditions</li> + <li>Fix problem where deserialisers were treating integers as strings</li> + <li>Update methods to make them null-safe</li> + <li>Fix many issues reported by coverity</li> + <li>Improve equals(), compareTo() and hash() in domain model</li> + <li>Improvements to the domain model for metadata classes</li> + <li>Fix CORS issues when downloading document</li> + <li>Implementation of case-handling with registryEntry and document upload</li> + <li>Better support in Javascript for OPTIONS</li> + <li>Adding concept description of mail integration</li> + <li>Improve setting of default values for GET on ny-journalpost</li> + <li>Better handling of required values during deserialisation </li> + <li>Changed tilknyttetDato (M620) from date to dateTime</li> + <li>Corrected some opprettetDato (M600) (de)serialisation errors.</li> + <li>Improve parse error reporting.</li> + <li>Started on OData search and filtering.</li> + <li>Added Contributor Covenant Code of Conduct to project.</li> + <li>Moved repository and project from Github to Gitlab.</li> + <li>Restructured repository, moved code into src/ and web/.</li> + <li>Updated code to use Spring Boot version 2.</li> + <li>Added support for OAuth2 authentication.</li> + <li>Fixed several bugs discovered by Coverity.</li> + <li>Corrected handling of date/datetime fields.</li> + <li>Improved error reporting when rejecting during deserializatoin.</li> + <li>Adjusted default values provided for ny-arkivdel, ny-mappe, + ny-saksmappe, ny-journalpost and ny-dokumentbeskrivelse.</li> + <li>Several fixes for korrespondansepart*.</li> + <li>Updated web GUI: + <ul> + <li>Now handle both file upload and download.</li> + <li>Uses new OAuth2 authentication for login.</li> + <li>Forms now fetches default values from API using GET.</li> + <li>Added RFC 822 (email), TIFF and JPEG to list of possible file formats.</li> + </ul></li> +</ul> + +<p>The changes and improvements are extensive. Running diffstat on +the changes between git tab 0.1.1 and 0.2 show 1098 files changed, +108666 insertions(+), 54066 deletions(-).</p> + +<p>If free and open standardized archiving API sound interesting to +you, please contact us on IRC +(<a href="irc://irc.freenode.net/%23nikita">#nikita on +irc.freenode.net</a>) or email +(<a href="https://lists.nuug.no/mailman/listinfo/nikita-noark">nikita-noark +mailing list</a>).</p> -<p><pre> -youtube-dl --write-sub --sub-format ttml \ - --convert-subtitles srt --embed-subs \ - https://tv.nrk.no/serie/ramm-ferdig-gaa/MUHU11000316/27-04-2018 -</pre></p> - -<p>URL-eksemplet er dagens toppsak på tv.nrk.no. Resultatet er en -MP4-fil med filmen og undertekster som kan spilles av med VLC. Merk -at VLC ikke viser frem undertekster før du aktiverer dem. For å gjøre -det, høyreklikk med musa i fremviservinduet, velg menyvalget for -undertekst og så norsk språk. Jeg testet også '--write-auto-sub', -men det kommandolinjeargumentet ser ikke ut til å fungere, så jeg -endte opp med settet med argumentlisten over, som jeg fant i en -feilrapport i youtube-dl-prosjektets samling over feilrapporter.</p> - -<p>Denne støtten i youtube-dl gjør det svært enkelt å lagre -NRK-innslag, det være seg nyheter, filmer, serier eller dokumentater, -for å ha dem tilgjengelig for fremtidig referanse og bruk, uavhengig -av hvor lenge innslagene ligger tilgjengelig hos NRK. Så får det ikke -hjelpe at NRKs jurister mener at det er -<a href="http://people.skolelinux.org/pere/blog/Best___ikke_fortelle_noen_at_streaming_er_nedlasting___.html">vesensforskjellig -å legge tilgjengelig for nedlasting og for streaming</a>, når det rent -teknisk er samme sak.</p> - -<p>Programmet youtube-dl støtter også en rekke andre nettsteder, se -prosjektoversikten for -<a href="http://rg3.github.io/youtube-dl/supportedsites.html">en -komplett liste</a>.</p> +<p>As usual, if you use Bitcoin and want to show your support of my +activities, please send Bitcoin donations to my address +<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>