X-Git-Url: https://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/93f8b2c79949b69f126fab268095590bc294c673..f26984572db96698b8ecfaec025910b9ce6df826:/blog/tags/frikanalen/index.html diff --git a/blog/tags/frikanalen/index.html b/blog/tags/frikanalen/index.html index 0743842a66..1584bcb145 100644 --- a/blog/tags/frikanalen/index.html +++ b/blog/tags/frikanalen/index.html @@ -20,6 +20,455 @@

Entries tagged "frikanalen".

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+ Techno TV broadcasting live across Norway and the Internet (#debconf16, #nuug) on @frikanalen +
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+ 1st August 2016 +
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Did you know there is a TV channel broadcasting talks from DebConf +16 across an entire country? Or that there is a TV channel +broadcasting talks by or about +Linus Torvalds, +Tor, +OpenID, +Common Lisp, +Civic Tech, +EFF founder John Barlow, +how to make 3D +printer electronics and many more fascinating topics? It works +using only free software (all of it +available from Github), and +is administrated using a web browser and a web API.

+ +

The TV channel is the Norwegian open channel +Frikanalen, and I am involved +via the NUUG member association in +running and developing the software for the channel. The channel is +organised as a member organisation where its members can upload and +broadcast what they want (think of it as Youtube for national +broadcasting television). Individuals can broadcast too. The time +slots are handled on a first come, first serve basis. Because the +channel have almost no viewers and very few active members, we can +experiment with TV technology without too much flack when we make +mistakes. And thanks to the few active members, most of the slots on +the schedule are free. I see this as an opportunity to spread +knowledge about technology and free software, and have a script I run +regularly to fill up all the open slots the next few days with +technology related video. The end result is a channel I like to +describe as Techno TV - filled with interesting talks and +presentations.

+ +

It is available on channel 50 on the Norwegian national digital TV +network (RiksTV). It is also available as a multicast stream on +Uninett. And finally, it is available as +a WebM unicast stream from +Frikanalen and NUUG. Check it out. :)

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+ + + Tags: english, frikanalen, nuug, video. + + +
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+ Tor - from its creators mouth 11 years ago +
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+ 28th May 2016 +
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A little more than 11 years ago, one of the creators of Tor, and +the current President of the Tor +project, Roger Dingledine, gave a talk for the members of the +Norwegian Unix User group (NUUG). A +video of the talk was recorded, and today, thanks to the great help +from David Noble, I finally was able to publish the video of the talk +on Frikanalen, the Norwegian open channel TV station where NUUG +currently publishes its talks. You can +watch the live stream using a web +browser with WebM support, or check out the recording on the video +on demand page for the talk +"Tor: Anonymous +communication for the US Department of Defence...and you.".

+ +

Here is the video included for those of you using browsers with +HTML video and Ogg Theora support:

+ +

+ +

I guess the gist of the talk can be summarised quite simply: If you +want to help the military in USA (and everyone else), use Tor. :)

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+ + + Tags: english, frikanalen, nuug, video. + + +
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+ MakerCon Nordic videos now available on Frikanalen +
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+ 2nd July 2015 +
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Last oktober I was involved on behalf of +NUUG with recording the talks at +MakerCon Nordic, a conference for +the Maker movement. Since then it has been the plan to publish the +recordings on Frikanalen, which +finally happened the last few days. A few talks are missing because +the speakers asked the organizers to not publish them, but most of the +talks are available. The talks are being broadcasted on RiksTV +channel 50 and using multicast on Uninett, as well as being available +from the Frikanalen web site. The unedited recordings are +available on +Youtube too.

+ +

This is the list of talks available at the moment. Visit the +Frikanalen video +pages to view them.

+ + + +

Part of the reason this took so long was that the scripts NUUG had +to prepare a recording for publication were five years old and no +longer worked with the current video processing tools (command line +argument changes). In addition, we needed better audio normalization, +which sent me on a detour to +package +bs1770gain for Debian. Now this is in place and it became a lot +easier to publish NUUG videos on Frikanalen.

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+ + + Tags: english, frikanalen, multimedia, video. + + +
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+ Measuring and adjusting the loudness of a TV channel using bs1770gain +
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+ 11th June 2015 +
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Television loudness is the source of frustration for viewers +everywhere. Some channels are very load, others are less loud, and +ads tend to shout very high to get the attention of the viewers, and +the viewers do not like this. This fact is well known to the TV +channels. See for example the BBC white paper +"Terminology +for loudness and level dBTP, LU, and all that" from 2011 for a +summary of the problem domain. To better address the need for even +loadness, the TV channels got together several years ago to agree on a +new way to measure loudness in digital files as one step in +standardizing loudness. From this came the ITU-R standard BS.1770, +"Algorithms to +measure audio programme loudness and true-peak audio level".

+ +

The ITU-R BS.1770 specification describe an algorithm to measure +loadness in LUFS (Loudness Units, referenced to Full Scale). But +having a way to measure is not enough. To get the same loudness +across TV channels, one also need to decide which value to standardize +on. For European TV channels, this was done in the EBU Recommondaton +R128, "Loudness +normalisation and permitted maximum level of audio signals", which +specifies a recommended level of -23 LUFS. In Norway, I have been +told that NRK, TV2, MTG and SBS have decided among themselves to +follow the R128 recommondation for playout from 2016-03-01.

+ +

There are free software available to measure and adjust the loudness +level using the LUFS. In Debian, I am aware of a library named +libebur128 +able to measure the loudness and since yesterday morning a new binary +named bs1770gain +capable of both measuring and adjusting was uploaded and is waiting +for NEW processing. I plan to maintain the latter in Debian under the +Debian +multimedia umbrella.

+ +

The free software based TV channel I am involved in, +Frikanalen, plan to follow the +R128 recommondation ourself as soon as we can adjust the software to +do so, and the bs1770gain tool seem like a good fit for that part of +the puzzle to measure loudness on new video uploaded to Frikanalen. +Personally, I plan to use bs1770gain to adjust the loudness of videos +I upload to Frikanalen on behalf of the +NUUG member organisation. The program seem to be able to measure +the LUFS value of any media file handled by ffmpeg, but I've only +successfully adjusted the LUFS value of WAV files. I suspect it +should be able to adjust it for all the formats handled by ffmpeg.

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+ + + Tags: english, frikanalen, multimedia, video. + + +
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+ Frikanalen, Norwegian TV channel for technical topics +
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+ 9th March 2015 +
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The Norwegian Unix User Group, +where I am a member, and where people interested in free software, +open standards and UNIX like operating systems like Linux and the BSDs +come together, record our monthly technical presentations on video. +The purpose is to document the talks and spread them to a wider +audience. For this, the the Norwegian nationwide open channel +Frikanalen is a useful venue. +Since a few days ago, when I figured out the +REST API to program the +channel time schedule, +the channel has been filled with NUUG talks, related recordings and +some Creative Commons licensed TED talks (from archive.org). I fill +all "leftover bits" on the channel with content from NUUG, which at +the moment is almost 17 of 24 hours every day.

+ +

The list of NUUG videos +uploaded so far +include things like a +one hour talk by John +Perry Barlow when he visited Oslo, a presentation of +Haiku, the BeOS +re-implementation, the +history of FiksGataMi, +the Norwegian version of FixMyStreet, the good old +Warriors of the net +video and many others.

+ +

We have a large backlog of NUUG talks not yet uploaded to +Frikanalen, and plan to upload every useful bit to the channel to +spread the word there. I also hope to find useful recordings from the +Chaos Computer Club and Debian conferences and spread them on the +channel as well. But this require locating the videos and their meta +information (title, description, license, etc), and preparing the +recordings for broadcast, and I have not yet had the spare time to +focus on this. Perhaps you want to help. Please join us on IRC, +#nuug on irc.freenode.net +if you want to help make this happen.

+ +

But as I said, already the channel is already almost exclusively +filled with technical topics, and if you want to learn something new +today, check out the Ogg Theora +web stream or use one of the other ways to get access to the +channel. Unfortunately the Ogg Theora recoding for distribution still +do not properly sync the video and sound. It is generated by recoding +a internal MPEG transport stream with MPEG4 coded video (ie H.264) to +Ogg Theora / Vorbis, and we have not been able to find a way that +produces acceptable quality. Help needed, please get in touch if you +know how to fix it using free software.

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+ + + Tags: english, frikanalen, h264, nuug, video. + + +
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+ The Norwegian open channel Frikanalen - 24x7 on the Internet +
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+ 25th February 2015 +
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The Norwegian nationwide open channel +Frikanalen is still going +strong. It allow everyone to send the video they want on national +television. It is a TV station administrated completely using a web +browser, running only Free +Software, providing a REST +api for administrators and members, and with distribution on the +national DVB-T distribution network RiksTV. But only between 12:00 +and 17:30 Norwegian time. This has finally changed, after many years +with limited distribution. A few weeks ago, we set up a Ogg Theora +stream via icecast to allow everyone with Internet access to check out +the channel the rest of the day. This is presented on +the Frikanalen web site now. And +since a few days ago, the channel is also available +via multicast on +UNINETT, available for those using IPTV TVs and set-top boxes in +the Norwegian National Research and Education network.

+ +

If you want to see what is on the channel, point your media player +to one of these sources. The first should work with most players and +browsers, while as far as I know, the multicast UDP stream only work +with VLC.

+ + + +

The Ogg Theora / icecast stream is not working well, as the video +and audio is slightly out of sync. We have not been able to figure +out how to fix it. It is generated by recoding a internal MPEG +transport stream with MPEG4 coded video (ie H.264) to Ogg Theora / +Vorbis, and the result is less then stellar. If you have ideas how to +fix it, please let us know on frikanalen (at) nuug.no. We currently +use this with ffmpeg2theora 0.29:

+ +
+./ffmpeg2theora.linux <OBE_gemini_URL.ts> -F 25 -x 720 -y 405 \
+ --deinterlace --inputfps 25 -c 1 -H 48000 --keyint 8 --buf-delay 100 \
+ --nosync -V 700 -o - | oggfwd video.nuug.no 8000 <pw> /frikanalen.ogv
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+ +

If you get the multicast UDP stream working, please let me know, as +I am curious how far the multicast stream reach. It do not make it to +my home network, nor any other commercially available network in +Norway that I am aware of.

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+ + + Tags: english, frikanalen, h264, nuug, video. + + +
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+ Nagios module to check if the Frikanalen video stream is working +
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+ 8th February 2015 +
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When running a TV station with both broadcast and web stream +distribution, it is useful to know that the stream is working. As I +am involved in the Norwegian open channel +Frikanalen as part of my +activity in the NUUG member +organisation, I wrote a script to use mplayer to connect to a +video stream, pick two images 35 seconds apart and compare them. If +the images are missing or identical, something is probably wrong with +the stream and an alarm should be triggered. The script is written as +a Nagios plugin, allowing us to use Nagios to run the check regularly +and sound the alarm when something is wrong. It is able to detect +both a hanging and a broken video stream.

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I just uploaded the code for the script into the +Frikanalen +git repository on github. If you run a TV station with web +streaming, perhaps you can find it useful too.

+ +

Last year, the Frikanalen public TV station transformed into using +only Linux based free software to administrate, schedule and +distribute the TV content. The +source code for the entire TV +station is available from the Github project page. Everyone can +use it to send their content on national TV, and we provide both a web +GUI and a web API to +add +and schedule +content. And thanks to last weeks developer gathering and +following activity, we now have the schedule +available as +XMLTV too. Still a lot of work left to do, especially with the +process to add videos and with the scheduling, so your contribution is +most welcome. Perhaps you want to set up your own TV station?

+ +

Update 2015-02-25: Got a tip from Uninett about their +qstream +monitoring system, which gather connection time, jitter, packet +loss and burst bandwidth usage. It look useful to check if UDP +streams are working as they should.

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+ + + Tags: english, frikanalen, nuug, video. + + +
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Til frikanalens støttespillere - fra styret i Frikanalen @@ -968,6 +1417,87 @@ NUUG lykkes med å få ut sine opptak med like stor suksess.

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