<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Cura__the_nice_3D_print_slicer__is_now_in_Debian_Unstable.html">Cura, the nice 3D print slicer, is now in Debian Unstable</a></div>
- <div class="date">17th December 2017</div>
- <div class="body"><p>After several months of working and waiting, I am happy to report
-that the nice and user friendly 3D printer slicer software Cura just
-entered Debian Unstable. It consist of five packages,
-<a href="https://tracker.debian.org/pkg/cura">cura</a>,
-<a href="https://tracker.debian.org/pkg/cura-engine">cura-engine</a>,
-<a href="https://tracker.debian.org/pkg/libarcus">libarcus</a>,
-<a href="https://tracker.debian.org/pkg/fdm-materials">fdm-materials</a>,
-<a href="https://tracker.debian.org/pkg/libsavitar">libsavitar</a> and
-<a href="https://tracker.debian.org/pkg/uranium">uranium</a>. The last
-two, uranium and cura, entered Unstable yesterday. This should make
-it easier for Debian users to print on at least the Ultimaker class of
-3D printers. My nearest 3D printer is an Ultimaker 2+, so it will
-make life easier for at least me. :)</p>
-
-<p>The work to make this happen was done by Gregor Riepl, and I was
-happy to assist him in sponsoring the packages. With the introduction
-of Cura, Debian is up to three 3D printer slicers at your service,
-Cura, Slic3r and Slic3r Prusa. If you own or have access to a 3D
-printer, give it a go. :)</p>
-
-<p>The 3D printer software is maintained by the 3D printer Debian
-team, flocking together on the
-<a href="http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/3dprinter-general">3dprinter-general</a>
-mailing list and the
-<a href="irc://irc.debian.org/#debian-3dprinting">#debian-3dprinting</a>
-IRC channel.</p>
-
-<p>The next step for Cura in Debian is to update the cura package to
-version 3.0.3 and then update the entire set of packages to version
-3.1.0 which showed up the last few days.</p>
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Oppdaterte_kommentarer_til__Evaluation_of__il_legality__for_Popcorn_Time.html">Oppdaterte kommentarer til «Evaluation of (il)legality» for Popcorn Time</a></div>
+ <div class="date">16th January 2019</div>
+ <div class="body"><p>I forrige uke var jeg i Borgarting lagmannsrett som partshjelper og
+ sakkyndig vitne og presenterte mine oppdaterte undersøkelser rundt
+ <a href="https://github.com/petterreinholdtsen/public-domain-free-imdb">telling
+ av filmverk i det fri</a>, relatert til
+ <a href="https://www.nuug.no/">foreningen NUUG</a>s involvering i <a
+ href="https://www.nuug.no/news/tags/dns-domenebeslag/">saken om
+ Økokrims beslag og senere inndragning av DNS-domenet
+ popcorn-time.no</a>. I forkant hadde jeg oppdatert mitt notat med
+ kommentarer til et av aktors bevis, som forsøkte å måle hvor stor
+ andel ulovligheter som var tilgjengelig via Popcorn Time-avspillere.
+ Jeg mistenker flere kan ha glede av å lese dette notatet, som jeg
+ publiserte en tidligere versjon av i fjor, så her er det. Legger
+ også ved avskrift av dokument 09,13, som er det sentrale dokumentet
+ jeg kommenterer.</p>
+
+<p><strong>Oppdaterte kommentarer til «Evaluation of (il)legality» for
+Popcorn Time</strong></p>
+
+<p><strong>Oppsummering</strong></p>
+
+<p>Målemetoden som Økokrim har lagt til grunn når de påstår at 99% av
+ filmene tilgjengelig fra Popcorn Time deles ulovlig har svakheter
+ som gjør resultatet upålitelig.</p>
+
+<p>De eller den som har vurdert hvorvidt filmer kan lovlig deles er
+ ikke i stand til å identifisere filmer som kan deles lovlig eller er
+ falt i det fri og har tilsynelatende antatt at kun veldig gamle
+ filmer kan deles lovlig. Økokrim legger til grunn at det bare finnes
+ èn film, Charlie Chaplin-filmen «The Circus» fra 1928, som kan deles
+ fritt blant de som ble observert tilgjengelig via ulike Popcorn
+ Time-varianter. Med min begrensede og ufullstendige oversikt finner
+ jeg tre flere blant de observerte filmene: «The Brain That Wouldn't
+ Die» fra 1962, «God’s Little Acre» fra 1958 og «She Wore a Yellow
+ Ribbon» fra 1949. Det er godt mulig det finnes flere. Det finnes
+ dermed minst fire ganger så mange filmer som lovlig kan deles på
+ Internett i datasettet Økokrim har lagt til grunn når det påstås at
+ mindre enn 1 % kan deles lovlig.</p>
+
+<p>Dernest, utplukket som gjøres ved søk på tilfeldige ord hentet fra
+ ordlisten til Dale-Chall avviker fra årsfordelingen til de brukte
+ filmkatalogene som helhet, hvilket påvirker fordelingen mellom
+ filmer som kan lovlig deles og filmer som ikke kan lovlig deles. I
+ tillegg gir valg av øvre del (de fem første) av søkeresultatene et
+ avvik fra riktig årsfordeling, hvilket påvirker fordelingen av verk
+ i det fri i søkeresultatet.</p>
+
+<p>Til sist er det viktig å merke seg at det som måles er ikke
+ (u)lovligheten knyttet til <strong>bruken</strong> av Popcorn Time,
+ men (u)lovligheten til innholdet i ulike bittorrent-filmkataloger
+ som vedlikeholdes av ulike miljøer uavhengig av Popcorn Time, og som
+ ulike Popcorn Time-varianter har benyttet seg av.</p>
+
+<p>Omtalte dokumenter: 09,12, <a href="#dok-09-13">09,13</a>, 09,14,
+ 09,18, 09,19, 09,20.</p>
+
+<p><strong>Utfyllende kommentarer</strong></p>
+
+<p>Økokrim har forklart domstolene at minst 99% av alt som er
+ tilgjengelig fra ulike Popcorn Time-varianter deles ulovlig på
+ Internet. Jeg ble nysgjerrig på hvordan de er kommet frem til dette
+ tallet, og dette notatet er en samling kommentarer rundt målingen
+ Økokrim henviser til. Litt av bakgrunnen for at jeg valgte å se på
+ saken er at jeg er interessert i å identifisere og telle hvor mange
+ kunstneriske verk som er falt i det fri eller av andre grunner kan
+ lovlig deles på Internett, og dermed var interessert i hvordan en
+ hadde funnet den ene prosenten som kanskje deles lovlig.</p>
+
+<p>Andelen på 99% kommer fra et ukreditert og udatert notatet som tar
+ mål av seg å dokumentere en metode for å måle hvor (u)lovlig ulike
+ Popcorn Time-varianter er.</p>
+
+<p>Raskt oppsummert, så forteller metodedokumentet at fordi det ikke
+ er mulig å få tak i komplett liste over alle filmtitler tilgjengelig
+ via Popcorn Time, så lages noe som skal være et representativt
+ utvalg ved å velge 50 tilfeldige søkeord større enn tre tegn fra en
+ ordliste kjent som Dale-Chall. For hvert søkeord gjøres et søk og de
+ første fem filmene i søkeresultatet samles inn inntil 100 unike
+ filmtitler er funnet. Hvis 50 søkeord ikke var tilstrekkelig for å
+ nå 100 unike filmtitler ble flere filmer fra hvert søkeresultat lagt
+ til. Hvis dette heller ikke var tilstrekkelig, så ble det hentet ut
+ og søkt på flere tilfeldig valgte søkeord inntil 100 unike
+ filmtitler var identifisert.</p>
+
+<p>Deretter ble for hver av filmtitlene «vurdert hvorvidt det var
+ rimelig å forvente om at verket var vernet av copyright, ved å se på
+ om filmen var tilgjengelig i IMDB, samt se på regissør,
+ utgivelsesår, når det var utgitt for bestemte markedsområder samt
+ hvilke produksjons- og distribusjonsselskap som var registrert» (min
+ oversettelse).</p>
+
+<p>Metoden er gjengitt både i de ukrediterte dokumentene 09,13 og
+ 09,19, samt beskrevet fra side 47 i dokument 09,20, lysark datert
+ 2017-02-01. Sistnevnte er kreditert Geerart Bourlon fra Motion
+ Picture Association EMEA.</p>
+
+<p>Metoden virker å ha flere svakheter som gir resultatene en
+ slagside. Den starter med å slå fast at det ikke er mulig å hente ut
+ en komplett liste over alle filmtitler som er tilgjengelig, og at
+ dette er bakgrunnen for metodevalget. Denne forutsetningen er ikke i
+ tråd med det som står i dokument 09,12, som ikke heller har oppgitt
+ forfatter og dato. Dokument 09,12 forteller hvordan hele
+ kataloginnholdet i en bittorrent-katalog ble lasted ned og talt
+ opp. Dokument 09,12 er muligens samme rapport som det ble referert
+ til i dom fra Oslo Tingrett 2017-11-03
+ (<a href="https://www.domstol.no/no/Enkelt-domstol/Oslo--tingrett/Nyheter/ma-sperre-for-popcorn-time/">sak
+ 17-093347TVI-OTIR/05</a>) under navnet rapport av 1. juni 2017 av
+ Alexander Kind Petersen. De ligner, men jeg har ikke sammenlignet
+ dokumentene ord for ord for å kontrollere om de er identiske.</p>
+
+<p>Det finnes flere kilder som kan brukes til å finne filmer som er
+ allemannseie (public domain) eller har bruksvilkår som gjør det
+ lovlig for alle å dele dem på Internett. Jeg har det siste året
+ forsøkt å samle og krysskoble disse listene ved hjelp av tittel-ID i
+ IMDB for å forsøke å telle antall filmer i det fri. Ved å ta
+ utgangspunkt i slike lister (og publiserte filmer for
+ Internett-arkivets del), har jeg så langt klart å identifisere over
+ 14 000 filmer, hovedsaklig spillefilmer. Noen filmer er gått tapt
+ ved at de eneste kjente eksemplarene er blitt ødelagt. Jeg har ikke
+ forsøkt å finne ut hvilke filmer som er gått tapt, ut over å se
+ hvilke filmer som er tilgjengelig på filmdelings-nettsteder.</p>
+
+<p>IMDB er en forkortelse for The Internet Movie Database, en
+ anerkjent kommersiell nettjeneste som brukes aktivt av både
+ filmbransjen og andre til å holde rede på hvilke spillefilmer (og
+ endel andre filmer) som finnes eller er under produksjon, samt
+ informasjon om disse filmene. Datakvaliteten er høy, med få feil og
+ få filmer som mangler. IMDB viser ikke informasjon om
+ opphavsrettslig status for filmene på infosiden for hver film, men
+ frivillige har lagt ut på IMDB-tjenesten lister med filmer som antas
+ å være verk i det fri. Disse listene er en liten del av kildene for
+ min telling av verk som kan lovlig deles på Internett.</p>
+
+<p>De aller fleste oppføringene over verk i det fri er hentet fra IMDB
+ selv, basert på det faktum at alle filmer laget i USA før 1923 er
+ falt i det fri. Tilsvarende tidsgrense for Storbritannia er
+ 1912-07-01, men dette utgjør bare veldig liten del av spillefilmene
+ i IMDB (19 totalt). En annen stor andel kommer fra
+ Internett-arkivet, der jeg har identifisert filmer som har referanse
+ til IMDB. Internett-arkivet, som holder til i USA, har
+ som <a href="https://archive.org/about/terms.php">policy å kun
+ publisere filmer som det er lovlig å distribuere</a>. Jeg har under
+ arbeidet kommet over flere filmer som har blitt fjernet fra
+ Internett-arkivet, hvilket gjør at jeg konkluderer med at folkene
+ som kontrollerer Internett-arkivet har et aktivt forhold til kun å
+ ha lovlig innhold der, selv om det i stor grad er drevet av
+ frivillige. Internett-arkivet har publisert 4.6 millioner
+ videofilmer som samtlige er tilgjengelig også med
+ Bittorrent-protokollen. En annen stor liste med filmer kommer fra
+ det kommersielle selskapet Retro Film Vault, som selger
+ allemannseide filmer til TV- og filmbransjen, Jeg har også benyttet
+ meg av lister over filmer som hevdes å være allemannseie, det være
+ seg Public Domain Review, Public Domain Torrents og Public Domain
+ Movies (to ulike tjenester med samme navn, på .net og .info), samt
+ lister over filmer med Creative Commons-lisensiering fra Wikipedia,
+ VODO og The Hill Productions. Jeg har gjort endel stikkontroll ved å
+ vurdere filmer som kun omtales på en liste. Der jeg har funnet feil
+ som har gjort meg i tvil om vurderingen til de som har laget listen
+ har jeg forkastet listen fullstendig (gjelder for eksemel en av
+ listene fra IMDB).</p>
+
+<p>Ved å ta utgangspunkt i verk som kan antas å være lovlig delt på
+ Internett (fra blant annet Internett-arkivet, Public Domain
+ Torrents, Public Domain Reivew og Public Domain Movies), og knytte
+ dem til oppføringer i IMDB, så har jeg så langt klart å identifisere
+ over 14 000 filmer (hovedsaklig spillefilmer) det er grunn til å tro
+ kan lovlig distribueres av alle på Internett. Som ekstra kilder er
+ det brukt lister over filmer som antas/påstås å være
+ allemannseie. Disse kildene kommer fra miljøer som jobber for å
+ gjøre tilgjengelig for almennheten alle verk som er falt i det fri
+ eller har bruksvilkår som tillater deling.</p>
+
+<p>I tillegg til de over 14 000 filmene der tittel-ID i IMDB er
+ identifisert, har jeg funnet mer enn 26 000 oppføringer der jeg ennå
+ ikke har hatt kapasitet til å spore opp tittel-ID i IMDB. Jeg har
+ sett at noen av disse er duplikater av de IMDB-oppføringene som er
+ identifisert så langt, men de fleste jeg har hatt tid til å
+ undersøke så langt har vist seg å ikke være duplikater. Retro Film
+ Vault hevder å ha 44 000 filmverk i det fri i sin katalog, så det er
+ mulig at det reelle tallet er betydelig høyere enn de jeg har klart
+ å identifisere så langt. Konklusjonen en kan trekke fra dette er at
+ tallet 14 000 er nedre grense for hvor mange filmer i IMDB som kan
+ lovlig deles på Internett. I
+ følge <a href="https://www.imdb.com/stats">statistikk fra IMDB</a>
+ er det 4.6 millioner titler registrert, hvorav 3 millioner er
+ TV-serieepisoder.</p>
+
+<p>Hvis en fordeler på år alle tittel-IDene i IMDB som hevdes å deles
+ lovlig på Internett, får en følgende histogram:</p>
+
+<p align="center"><img src="http://people.skolelinux.org/pere/blog/images/2019-01-16-dns-beslag-verkidetfri-2018-11-26-histogram-year.png"
+ alt="histogram over frie filmer per år" width="80%"/></p>
+
+<p>En kan i histogrammet se at effekten av manglende registrering
+ eller fornying av registrering er at mange filmer gitt ut i USA før
+ 1978 er allemannseie i dag. I tillegg kan en se at det finnes flere
+ filmer gitt ut de siste årene med bruksvilkår som tillater deling,
+ muligens på grunn av fremveksten
+ av <a href="https://creativecommons.org/">Creative
+ Commons</a>-bevegelsen.</p>
+
+<p>IMDB har lagt ut <a href="https://www.imdb.com/interfaces/">en
+ maskinlesbare liste</a> over alle registreringene i sin database, og
+ ved hjelp av denne har jeg oppsummert antall titler per år i
+ kategoriene «movies» og «short», som er det jeg fokuserer på i min
+ telling. Inn i oversikten er det tegnet hvor stor prosentandel
+ antallet filmer som hevdes å kunne deles lovlig på Internett utgjør
+ av IMDB-totalen. Ut fra oversikten får man en ide om hvor stor andel
+ av totalen som kan mangle i min telling, for eksempel ved å merke
+ seg at få prosenter av filmene utgitt tidlig på 1900-tallet er med i
+ min telling.</p>
+
+<p align="center"><img src="http://people.skolelinux.org/pere/blog/images/2019-01-16-dns-beslag-verkidetfri-2018-11-26-histogram-year-imdb.png"
+ alt="histogram over filmer og frie filmer per år" width="80%" /></p>
+
+<p>For maskinell analyse av katalogene laget jeg et lite program som
+ kobler seg til bittorrent-katalogene som brukes av ulike Popcorn
+ Time-varianter og laster ned komplett liste over filmer i
+ katalogene. Dette bekrefter at det er mulig å hente ut komplett
+ liste med alle filmtitler som er tilgjengelig i katalogene, i strid
+ med påstanden i dokumentene 09,13, 09,19 og 09,20. Jeg har sett på
+ fire bittorrent-kataloger. Den ene ble brukt av klienten
+ tilgjengelig fra www.popcorntime.sh 2017-12-18 og er navngitt «sh» i
+ dette dokumentet. Den andre brukes i følge dokument 09,12 av
+ klienten tilgjengelig fra popcorntime.ag og popcorntime.sh på ukjent
+ tidspunkt og er navngitt «yts» i dette dokumentet. Den tredje ble
+ brukt av websidene tilgjengelig fra popcorntime-online.tv 2017-12-18
+ og er navngitt «apidomain» i dette dokumentet. Den fjerde ble brukt
+ av klienten tilgjengelig fra popcorn-time.to i følge dokument 09,12
+ på ukjent tidspunkt, og er navngitt «ukrfnlge» i dette
+ dokumentet. Hvilke kataloger som brukes av ulike Popcorn
+ Time-klienter endrer seg over tid, da Popcorn Time-klientene i
+ praksis er nettlesere som viser frem ulike nettsider og disse
+ nettsidene bytter datakilder når nettsidens eier ønsker det.</p>
+
+<p>Metoden som Økokrim legger til grunn, skriver i sitt punkt fire at
+ skjønn er en egnet metode for å finne ut om en film kan lovlig deles
+ på Internett eller ikke, og sier at det ble «vurdert hvorvidt det
+ var rimelig å forvente om at verket var vernet av copyright». For
+ det første er det ikke nok å slå fast om en film er «vernet av
+ copyright» for å vite om det er lovlig å dele den på Internett eller
+ ikke, da det finnes flere filmer med opphavsrettslige bruksvilkår
+ som tillater deling på Internett. Eksempler på dette er Creative
+ Commons-lisensierte filmer som Citizenfour fra 2014 og Sintel fra
+ 2010. I tillegg til slike finnes det flere filmer som nå er
+ allemannseie (public domain) på grunn av manglende registrering
+ eller fornying av registrering selv om både regisør,
+ produksjonsselskap og distributør ønsker seg vern. Eksempler på
+ dette er Plan 9 from Outer Space fra 1959 og Night of the Living
+ Dead fra 1968. Alle filmer fra USA som var allemannseie før
+ 1989-03-01 forble i det fri da Bern-konvensjonen, som tok effekt i
+ USA på det tidspunktet, ikke ble gitt tilbakevirkende
+ kraft. <a href="https://www.latimes.com/local/lanow/la-me-ln-happy-birthday-song-lawsuit-decision-20150922-story.html">Historien
+ om sangen «Happy birthday»</a>, der betaling for bruk har vært krevd
+ inn i flere tiår selv om sangen ikke var vernet av åndsverksloven,
+ forteller oss at hvert enkelt verk må vurderes nøye og i detalj før
+ en kan slå fast om verket er allemannseie eller ikke, det holder
+ ikke å tro på selverklærte rettighetshavere. Flere eksempel på verk
+ i det fri som feilklassifiseres som vernet er fra dokument 09,18,
+ som lister opp søkeresultater for pklienten omtalt som
+ popcorntime.sh og i følge notatet kun inneholder en film (The Circus
+ fra 1928) som under tvil kan antas å være allemannseie.</p>
+
+<p>Ved rask gjennomlesning av dokument 09,18, som inneholder
+ skjermbilder fra bruk av en Popcorn Time-variant, fant jeg omtalt
+ både filmen «The Brain That Wouldn't Die» fra 1962 som
+ er <a href="https://archive.org/details/brain_that_wouldnt_die">tilgjengelig
+ fra Internett-arkivet</a> og
+ som <a href="https://en.wikipedia.org/wiki/List_of_films_in_the_public_domain_in_the_United_States">i
+ følge Wikipedia er allemannseie i USA</a> da den ble gitt ut i 1962
+ uten «copyright»-merking, og filmen «God’s Little Acre» fra
+ 1958 <a href="https://en.wikipedia.org/wiki/God%27s_Little_Acre_%28film%29">som
+ er lagt ut på Wikipedia</a>, der det fortelles at sort/hvit-utgaven
+ er allemannseie. Det fremgår ikke fra dokument 09,18 om filmen
+ omtalt der er sort/hvit-utgaven. Av kapasitetsårsaker og på grunn av
+ at filmoversikten i dokument 09,18 ikke er maskinlesbart har jeg
+ ikke forsøkt å sjekke alle filmene som listes opp der om mot liste
+ med filmer som er antatt lovlig kan distribueres på Internet.</p>
+
+<p>Ved maskinell gjennomgang av listen med IMDB-referanser under
+ regnearkfanen «Unique titles» i dokument 09.14, fant jeg i tillegg
+ filmen «She Wore a Yellow Ribbon» fra 1949) som nok også er
+ feilklassifisert. Filmen «She Wore a Yellow Ribbon» er tilgjengelig
+ fra Internett-arkivet og markert som allemannseie der. Det virker
+ dermed å være minst fire ganger så mange filmer som kan lovlig deles
+ på Internett enn det som er lagt til grunn når en påstår at minst
+ 99% av innholdet er ulovlig. Jeg ser ikke bort fra at nærmere
+ undersøkelser kan avdekke flere. Poenget er uansett ikke hvor mange
+ filmer i listen som er lovlig å dele på Internet, men at metodens
+ punkt med vurdering av «rimelig å forvente om at verket var vernet
+ av copyright» gjør metoden upålitelig.</p>
+
+<p>Den omtalte målemetoden velger ut tilfeldige søketermer fra
+ ordlisten Dale-Chall. Den ordlisten inneholder 3000 enkle engelske
+ ord som fjerdeklassinger i USA er forventet å forstå. Det fremgår
+ ikke hvorfor akkurat denne ordlisten er valgt, og det er uklart for
+ meg om den er egnet til å få et representativt utvalg av
+ filmer. Mange av ordene gir tomt søkeresultat. Ved å simulerte
+ tilsvarende søk ser jeg store avvik fra fordelingen i katalogen for
+ enkeltmålinger. Dette antyder at enkeltmålinger av 100 filmer slik
+ målemetoden beskriver er gjort, ikke er velegnet til å finne andel
+ ulovlig innhold i bittorrent-katalogene.</p>
+
+<p>En kan motvirke dette store avviket for enkeltmålinger ved å gjøre
+ mange søk og slå sammen resultatet. Jeg har testet ved å gjennomføre
+ 100 enkeltmålinger (dvs. måling av (100x100=) 10 000 tilfeldig
+ valgte filmer) som gir mindre, men fortsatt betydelig avvik, i
+ forhold til telling av filmer pr år i hele katalogen.</p>
+
+<p>Målemetoden henter ut de fem øverste i
+ søkeresultatet. Søkeresultatene er sortert på antall
+ bittorrent-klienter registrert som delere i katalogene, hvilket kan
+ gi en slagside mot hvilke filmer som er populære blant de som bruker
+ bittorrent-katalogene, uten at det forteller noe om hvilket innhold
+ som er tilgjengelig eller hvilket innhold som deles med Popcorn
+ Time-klienter. Jeg har forsøkt å måle hvor stor en slik slagside
+ eventuelt er ved å sammenligne fordelingen hvis en tar de 5 nederste
+ i søkeresultatet i stedet. Avviket for disse to metodene for flere
+ av katalogene er godt synlig på histogramet. Her er histogram over
+ filmer funnet i den komplette katalogen (grønn strek), og filmer
+ funnet ved søk etter ord i Dale-Chall. Grafer merket «top» henter
+ fra de 5 første i søkeresultatet, mens de merket «bottom» henter fra
+ de 5 siste. En kan her se at resultatene påvirkes betydelig av
+ hvorvidt en ser på de første eller de siste filmene i et
+ søketreff.</p>
+
+<p align="center">
+ <img src="http://people.skolelinux.org/pere/blog/images/2017-12-20-histogram-year-sh-top.png" width="40%" />
+ <img src="http://people.skolelinux.org/pere/blog/images/2017-12-20-histogram-year-sh-bottom.png" width="40%" />
+ <br/>
+ <img src="http://people.skolelinux.org/pere/blog/images/2017-12-20-histogram-year-yts-top.png" width="40%" />
+ <img src="http://people.skolelinux.org/pere/blog/images/2017-12-20-histogram-year-yts-bottom.png" width="40%" />
+ <br/>
+ <img src="http://people.skolelinux.org/pere/blog/images/2017-12-20-histogram-year-ukrfnlge-top.png" width="40%" />
+ <img src="http://people.skolelinux.org/pere/blog/images/2017-12-20-histogram-year-ukrfnlge-bottom.png" width="40%" />
+ <br/>
+ <img src="http://people.skolelinux.org/pere/blog/images/2017-12-20-histogram-year-apidomain-top.png" width="40%" />
+ <img src="http://people.skolelinux.org/pere/blog/images/2017-12-20-histogram-year-apidomain-bottom.png" width="40%" />
+</p>
+
+<p>Det er viktig å merke seg at de omtalte bittorrent-katalogene ikke
+ er laget for bruk med Popcorn Time, men for ulike miljøer av
+ bittorrent-brukere. Eksempelvis tilhører katalogen YTS, som brukes
+ av klientet som ble lastes ned fra popcorntime.sh, et selvstendig
+ fildelings-relatert nettsted YTS.AG med et separat
+ brukermiljø. Målemetoden foreslått av Økokrim måler dermed ikke
+ (u)lovligheten rundt bruken av Popcorn Time, men (u)lovligheten til
+ innholdet i disse katalogene.</p>
+
+<hr/>
+
+<p id="dok-09-13">Metoden fra Økokrims dokument 09,13 i straffesaken
+ om DNS-beslag.</p>
+
+<blockquote>
+
+<p><strong>1. Evaluation of (il)legality</strong></p>
+
+<p><strong>1.1. Methodology</strong>
+
+<p>Due to its technical configuration, Popcorn Time applications don't
+allow to make a full list of all titles made available. In order to
+evaluate the level of illegal operation of PCT, the following
+methodology was applied:</p>
+
+<ol>
+
+ <li>A random selection of 50 keywords, greater than 3 letters, was
+ made from the Dale-Chall list that contains 3000 simple English
+ words1. The selection was made by using a Random Number
+ Generator2.</li>
+
+ <li>For each keyword, starting with the first randomly selected
+ keyword, a search query was conducted in the movie section of the
+ respective Popcorn Time application. For each keyword, the first
+ five results were added to the title list until the number of 100
+ unique titles was reached (duplicates were removed).</li>
+
+ <li>For one fork, .CH, insufficient titles were generated via this
+ approach to reach 100 titles. This was solved by adding any
+ additional query results above five for each of the 50 keywords.
+ Since this still was not enough, another 42 random keywords were
+ selected to finally reach 100 titles.</li>
+
+ <li>It was verified whether or not there is a reasonable expectation
+ that the work is copyrighted by checking if they are available on
+ IMDb, also verifying the director, the year when the title was
+ released, the release date for a certain market, the production
+ company/ies of the title and the distribution company/ies.</li>
+
+</ol>
+
+<p><strong>1.2. Results</strong></p>
+
+<p>Between 6 and 9 June 2016, four forks of Popcorn Time were
+investigated: popcorn-time.to, popcorntime.ag, popcorntime.sh and
+popcorntime.ch. An excel sheet with the results is included in
+Appendix 1. Screenshots were secured in separate Appendixes for each
+respective fork, see Appendix 2-5.</p>
+
+<p>For each fork, out of 100, de-duplicated titles it was possible to
+retrieve data according to the parameters set out above that indicate
+that the title is commercially available. Per fork, there was 1 title
+that presumably falls within the public domain, i.e. the 1928 movie
+"The Circus" by and with Charles Chaplin.</p>
+
+<p>Based on the above it is reasonable to assume that 99% of the movie
+content of each fork is copyright protected and is made available
+illegally.</p>
+
+<p>This exercise was not repeated for TV series, but considering that
+besides production companies and distribution companies also
+broadcasters may have relevant rights, it is reasonable to assume that
+at least a similar level of infringement will be established.</p>
+
+<p>Based on the above it is reasonable to assume that 99% of all the
+content of each fork is copyright protected and are made available
+illegally.</p>
+
+</blockquote>
+
+<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>
</div>
<div class="tags">
- Tags: <a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling</a>, <a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture</a>, <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>, <a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett</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>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Idea_for_finding_all_public_domain_movies_in_the_USA.html">Idea for finding all public domain movies in the USA</a></div>
- <div class="date">13th December 2017</div>
- <div class="body"><p>While looking at
-<a href="http://onlinebooks.library.upenn.edu/cce/">the scanned copies
-for the copyright renewal entries for movies published in the USA</a>,
-an idea occurred to me. The number of renewals are so few per year, it
-should be fairly quick to transcribe them all and add references to
-the corresponding IMDB title ID. This would give the (presumably)
-complete list of movies published 28 years earlier that did _not_
-enter the public domain for the transcribed year. By fetching the
-list of USA movies published 28 years earlier and subtract the movies
-with renewals, we should be left with movies registered in IMDB that
-are now in the public domain. For the year 1955 (which is the one I
-have looked at the most), the total number of pages to transcribe is
-21. For the 28 years from 1950 to 1978, it should be in the range
-500-600 pages. It is just a few days of work, and spread among a
-small group of people it should be doable in a few weeks of spare
-time.</p>
-
-<p>A typical copyright renewal entry look like this (the first one
-listed for 1955):</p>
-
-<p><blockquote>
- ADAM AND EVIL, a photoplay in seven reels by Metro-Goldwyn-Mayer
- Distribution Corp. (c) 17Aug27; L24293. Loew's Incorporated (PWH);
- 10Jun55; R151558.
-</blockquote></p>
-
-<p>The movie title as well as registration and renewal dates are easy
-enough to locate by a program (split on first comma and look for
-DDmmmYY). The rest of the text is not required to find the movie in
-IMDB, but is useful to confirm the correct movie is found. I am not
-quite sure what the L and R numbers mean, but suspect they are
-reference numbers into the archive of the US Copyright Office.</p>
-
-<p>Tracking down the equivalent IMDB title ID is probably going to be
-a manual task, but given the year it is fairly easy to search for the
-movie title using for example
-<a href="http://www.imdb.com/find?q=adam+and+evil+1927&s=all">http://www.imdb.com/find?q=adam+and+evil+1927&s=all</a>.
-Using this search, I find that the equivalent IMDB title ID for the
-first renewal entry from 1955 is
-<a href="http://www.imdb.com/title/tt0017588/">http://www.imdb.com/title/tt0017588/</a>.</p>
-
-<p>I suspect the best way to do this would be to make a specialised
-web service to make it easy for contributors to transcribe and track
-down IMDB title IDs. In the web service, once a entry is transcribed,
-the title and year could be extracted from the text, a search in IMDB
-conducted for the user to pick the equivalent IMDB title ID right
-away. By spreading out the work among volunteers, it would also be
-possible to make at least two persons transcribe the same entries to
-be able to discover any typos introduced. But I will need help to
-make this happen, as I lack the spare time to do all of this on my
-own. If you would like to help, please get in touch. Perhaps you can
-draft a web service for crowd sourcing the task?</p>
-
-<p>Note, Project Gutenberg already have some
-<a href="http://www.gutenberg.org/ebooks/search/?query=copyright+office+renewals">transcribed
-copies of the US Copyright Office renewal protocols</a>, but I have
-not been able to find any film renewals there, so I suspect they only
-have copies of renewal for written works. I have not been able to find
-any transcribed versions of movie renewals so far. Perhaps they exist
-somewhere?</p>
-
-<p>I would love to figure out methods for finding all the public
-domain works in other countries too, but it is a lot harder. At least
-for Norway and Great Britain, such work involve tracking down the
-people involved in making the movie and figuring out when they died.
-It is hard enough to figure out who was part of making a movie, but I
-do not know how to automate such procedure without a registry of every
-person involved in making movies and their death year.</p>
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/CasparCG_Server_for_TV_broadcast_playout_in_Debian.html">CasparCG Server for TV broadcast playout in Debian</a></div>
+ <div class="date">15th January 2019</div>
+ <div class="body"><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>
<p>As usual, if you use Bitcoin and want to show your support of my
activities, please send Bitcoin donations to my address
<div class="tags">
- 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>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>.
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen</a>, <a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Is_the_short_movie__Empty_Socks__from_1927_in_the_public_domain_or_not_.html">Is the short movie «Empty Socks» from 1927 in the public domain or not?</a></div>
- <div class="date"> 5th December 2017</div>
- <div class="body"><p>Three years ago, a presumed lost animation film,
-<a href="https://en.wikipedia.org/wiki/Empty_Socks">Empty Socks from
-1927</a>, was discovered in the Norwegian National Library. At the
-time it was discovered, it was generally assumed to be copyrighted by
-The Walt Disney Company, and I blogged about
-<a href="http://people.skolelinux.org/pere/blog/Opphavsretts_status_for__Empty_Socks__fra_1927_.html">my
-reasoning to conclude</a> that it would would enter the Norwegian
-equivalent of the public domain in 2053, based on my understanding of
-Norwegian Copyright Law. But a few days ago, I came across
-<a href="http://www.toonzone.net/forums/threads/exposed-disneys-repurchase-of-oswald-the-rabbit-a-sham.4792291/">a
-blog post claiming the movie was already in the public domain</a>, at
-least in USA. The reasoning is as follows: The film was released in
-November or Desember 1927 (sources disagree), and presumably
-registered its copyright that year. At that time, right holders of
-movies registered by the copyright office received government
-protection for there work for 28 years. After 28 years, the copyright
-had to be renewed if the wanted the government to protect it further.
-The blog post I found claim such renewal did not happen for this
-movie, and thus it entered the public domain in 1956. Yet someone
-claim the copyright was renewed and the movie is still copyright
-protected. Can anyone help me to figure out which claim is correct?
-I have not been able to find Empty Socks in Catalog of copyright
-entries. Ser.3 pt.12-13 v.9-12 1955-1958 Motion Pictures
-<a href="http://onlinebooks.library.upenn.edu/cce/1955r.html#film">available
-from the University of Pennsylvania</a>, neither in
-<a href="https://babel.hathitrust.org/cgi/pt?id=mdp.39015084451130;page=root;view=image;size=100;seq=83;num=45">page
-45 for the first half of 1955</a>, nor in
-<a href="https://babel.hathitrust.org/cgi/pt?id=mdp.39015084451130;page=root;view=image;size=100;seq=175;num=119">page
-119 for the second half of 1955</a>. It is of course possible that
-the renewal entry was left out of the printed catalog by mistake. Is
-there some way to rule out this possibility? Please help, and update
-the wikipedia page with your findings.
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Learn_to_program_with_Minetest_on_Debian.html">Learn to program with Minetest on Debian</a></div>
+ <div class="date">15th December 2018</div>
+ <div class="body"><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
<div class="tags">
- Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture</a>, <a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett</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>.
+ 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>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Metadata_proposal_for_movies_on_the_Internet_Archive.html">Metadata proposal for movies on the Internet Archive</a></div>
- <div class="date">28th November 2017</div>
- <div class="body"><p>It would be easier to locate the movie you want to watch in
-<a href="https://www.archive.org/">the Internet Archive</a>, if the
-metadata about each movie was more complete and accurate. In the
-archiving community, a well known saying state that good metadata is a
-love letter to the future. The metadata in the Internet Archive could
-use a face lift for the future to love us back. Here is a proposal
-for a small improvement that would make the metadata more useful
-today. I've been unable to find any document describing the various
-standard fields available when uploading videos to the archive, so
-this proposal is based on my best quess and searching through several
-of the existing movies.</p>
-
-<p>I have a few use cases in mind. First of all, I would like to be
-able to count the number of distinct movies in the Internet Archive,
-without duplicates. I would further like to identify the IMDB title
-ID of the movies in the Internet Archive, to be able to look up a IMDB
-title ID and know if I can fetch the video from there and share it
-with my friends.</p>
-
-<p>Second, I would like the Butter data provider for The Internet
-archive
-(<a href="https://github.com/butterproviders/butter-provider-archive">available
-from github</a>), to list as many of the good movies as possible. The
-plugin currently do a search in the archive with the following
-parameters:</p>
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Non_blocking_bittorrent_plugin_for_vlc.html">Non-blocking bittorrent plugin for vlc</a></div>
+ <div class="date">12th December 2018</div>
+ <div class="body"><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>
-collection:moviesandfilms
-AND NOT collection:movie_trailers
-AND -mediatype:collection
-AND format:"Archive BitTorrent"
-AND year
+apt install vlc-plugin-bittorrent
</pre></p>
-<p>Most of the cool movies that fail to show up in Butter do so
-because the 'year' field is missing. The 'year' field is populated by
-the year part from the 'date' field, and should be when the movie was
-released (date or year). Two such examples are
-<a href="https://archive.org/details/SidneyOlcottsBen-hur1905">Ben Hur
-from 1905</a> and
-<a href="https://archive.org/details/Caminandes2GranDillama">Caminandes
-2: Gran Dillama from 2013</a>, where the year metadata field is
-missing.</p>
-
-So, my proposal is simply, for every movie in The Internet Archive
-where an IMDB title ID exist, please fill in these metadata fields
-(note, they can be updated also long after the video was uploaded, but
-as far as I can tell, only by the uploader):
-
-<dl>
-
-<dt>mediatype</dt>
-<dd>Should be 'movie' for movies.</dd>
-
-<dt>collection</dt>
-<dd>Should contain 'moviesandfilms'.</dd>
-
-<dt>title</dt>
-<dd>The title of the movie, without the publication year.</dd>
-
-<dt>date</dt>
-<dd>The data or year the movie was released. This make the movie show
-up in Butter, as well as make it possible to know the age of the
-movie and is useful to figure out copyright status.</dd>
-
-<dt>director</dt>
-<dd>The director of the movie. This make it easier to know if the
-correct movie is found in movie databases.</dd>
-
-<dt>publisher</dt>
-<dd>The production company making the movie. Also useful for
-identifying the correct movie.</dd>
-
-<dt>links</dt>
-
-<dd>Add a link to the IMDB title page, for example like this: <a
-href="http://www.imdb.com/title/tt0028496/">Movie in
-IMDB</a>. This make it easier to find duplicates and allow for
-counting of number of unique movies in the Archive. Other external
-references, like to TMDB, could be added like this too.</dd>
-
-</dl>
-
-<p>I did consider proposing a Custom field for the IMDB title ID (for
-example 'imdb_title_url', 'imdb_code' or simply 'imdb', but suspect it
-will be easier to simply place it in the links free text field.</p>
-
-<p>I created
-<a href="https://github.com/petterreinholdtsen/public-domain-free-imdb">a
-list of IMDB title IDs for several thousand movies in the Internet
-Archive</a>, but I also got a list of several thousand movies without
-such IMDB title ID (and quite a few duplicates). It would be great if
-this data set could be integrated into the Internet Archive metadata
-to be available for everyone in the future, but with the current
-policy of leaving metadata editing to the uploaders, it will take a
-while before this happen. If you have uploaded movies into the
-Internet Archive, you can help. Please consider following my proposal
-above for your movies, to ensure that movie is properly
-counted. :)</p>
-
-<p>The list is mostly generated using wikidata, which based on
-Wikipedia articles make it possible to link between IMDB and movies in
-the Internet Archive. But there are lots of movies without a
-Wikipedia article, and some movies where only a collection page exist
-(like for <a href="https://en.wikipedia.org/wiki/Caminandes">the
-Caminandes example above</a>, where there are three movies but only
-one Wikidata entry).</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
<div class="tags">
- 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>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>.
+ 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>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Legal_to_share_more_than_3000_movies_listed_on_IMDB_.html">Legal to share more than 3000 movies listed on IMDB?</a></div>
- <div class="date">18th November 2017</div>
- <div class="body"><p>A month ago, I blogged about my work to
-<a href="http://people.skolelinux.org/pere/blog/Locating_IMDB_IDs_of_movies_in_the_Internet_Archive_using_Wikidata.html">automatically
-check the copyright status of IMDB entries</a>, and try to count the
-number of movies listed in IMDB that is legal to distribute on the
-Internet. I have continued to look for good data sources, and
-identified a few more. The code used to extract information from
-various data sources is available in
-<a href="https://github.com/petterreinholdtsen/public-domain-free-imdb">a
-git repository</a>, currently available from github.</p>
-
-<p>So far I have identified 3186 unique IMDB title IDs. To gain
-better understanding of the structure of the data set, I created a
-histogram of the year associated with each movie (typically release
-year). It is interesting to notice where the peaks and dips in the
-graph are located. I wonder why they are placed there. I suspect
-World War II caused the dip around 1940, but what caused the peak
-around 2010?</p>
-
-<p align="center"><img src="http://people.skolelinux.org/pere/blog/images/2017-11-18-verk-i-det-fri-filmer.png" /></p>
-
-<p>I've so far identified ten sources for IMDB title IDs for movies in
-the public domain or with a free license. This is the statistics
-reported when running 'make stats' in the git repository:</p>
-
-<pre>
- 249 entries ( 6 unique) with and 288 without IMDB title ID in free-movies-archive-org-butter.json
- 2301 entries ( 540 unique) with and 0 without IMDB title ID in free-movies-archive-org-wikidata.json
- 830 entries ( 29 unique) with and 0 without IMDB title ID in free-movies-icheckmovies-archive-mochard.json
- 2109 entries ( 377 unique) with and 0 without IMDB title ID in free-movies-imdb-pd.json
- 291 entries ( 122 unique) with and 0 without IMDB title ID in free-movies-letterboxd-pd.json
- 144 entries ( 135 unique) with and 0 without IMDB title ID in free-movies-manual.json
- 350 entries ( 1 unique) with and 801 without IMDB title ID in free-movies-publicdomainmovies.json
- 4 entries ( 0 unique) with and 124 without IMDB title ID in free-movies-publicdomainreview.json
- 698 entries ( 119 unique) with and 118 without IMDB title ID in free-movies-publicdomaintorrents.json
- 8 entries ( 8 unique) with and 196 without IMDB title ID in free-movies-vodo.json
- 3186 unique IMDB title IDs in total
-</pre>
-
-<p>The entries without IMDB title ID are candidates to increase the
-data set, but might equally well be duplicates of entries already
-listed with IMDB title ID in one of the other sources, or represent
-movies that lack a IMDB title ID. I've seen examples of all these
-situations when peeking at the entries without IMDB title ID. Based
-on these data sources, the lower bound for movies listed in IMDB that
-are legal to distribute on the Internet is between 3186 and 4713.
-
-<p>It would be great for improving the accuracy of this measurement,
-if the various sources added IMDB title ID to their metadata. I have
-tried to reach the people behind the various sources to ask if they
-are interested in doing this, without any replies so far. Perhaps you
-can help me get in touch with the people behind VODO, Public Domain
-Torrents, Public Domain Movies and Public Domain Review to try to
-convince them to add more metadata to their movie entries?</p>
-
-<p>Another way you could help is by adding pages to Wikipedia about
-movies that are legal to distribute on the Internet. If such page
-exist and include a link to both IMDB and The Internet Archive, the
-script used to generate free-movies-archive-org-wikidata.json should
-pick up the mapping as soon as wikidata is updates.</p>
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Retten_til_kontant_betaling_er_en_rettighet_som_m__brukes_for___beholdes.html">Retten til kontant betaling er en rettighet som må brukes for å beholdes</a></div>
+ <div class="date">11th December 2018</div>
+ <div class="body"><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>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>
+<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 — 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>
</div>
<div class="tags">
- 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>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>.
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Some_notes_on_fault_tolerant_storage_systems.html">Some notes on fault tolerant storage systems</a></div>
- <div class="date"> 1st November 2017</div>
- <div class="body"><p>If you care about how fault tolerant your storage is, you might
-find these articles and papers interesting. They have formed how I
-think of when designing a storage system.</p>
-
-<ul>
-
-<li>USENIX :login; <a
-href="https://www.usenix.org/publications/login/summer2017/ganesan">Redundancy
-Does Not Imply Fault Tolerance. Analysis of Distributed Storage
-Reactions to Single Errors and Corruptions</a> by Aishwarya Ganesan,
-Ramnatthan Alagappan, Andrea C. Arpaci-Dusseau, and Remzi
-H. Arpaci-Dusseau</li>
-
-<li>ZDNet
-<a href="http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/">Why
-RAID 5 stops working in 2009</a> by Robin Harris</li>
-
-<li>ZDNet
-<a href="http://www.zdnet.com/article/why-raid-6-stops-working-in-2019/">Why
-RAID 6 stops working in 2019</a> by Robin Harris</li>
-
-<li>USENIX FAST'07
-<a href="http://research.google.com/archive/disk_failures.pdf">Failure
-Trends in a Large Disk Drive Population</a> by Eduardo Pinheiro,
-Wolf-Dietrich Weber and Luiz André Barroso</li>
-
-<li>USENIX ;login: <a
-href="https://www.usenix.org/system/files/login/articles/hughes12-04.pdf">Data
-Integrity. Finding Truth in a World of Guesses and Lies</a> by Doug
-Hughes</li>
-
-<li>USENIX FAST'08
-<a href="https://www.usenix.org/events/fast08/tech/full_papers/bairavasundaram/bairavasundaram_html/">An
-Analysis of Data Corruption in the Storage Stack</a> by
-L. N. Bairavasundaram, G. R. Goodson, B. Schroeder, A. C.
-Arpaci-Dusseau, and R. H. Arpaci-Dusseau</li>
-
-<li>USENIX FAST'07 <a
-href="https://www.usenix.org/legacy/events/fast07/tech/schroeder/schroeder_html/">Disk
-failures in the real world: what does an MTTF of 1,000,000 hours mean
-to you?</a> by B. Schroeder and G. A. Gibson.</li>
-
-<li>USENIX ;login: <a
-href="https://www.usenix.org/events/fast08/tech/full_papers/jiang/jiang_html/">Are
-Disks the Dominant Contributor for Storage Failures? A Comprehensive
-Study of Storage Subsystem Failure Characteristics</a> by Weihang
-Jiang, Chongfeng Hu, Yuanyuan Zhou, and Arkady Kanevsky</li>
-
-<li>SIGMETRICS 2007
-<a href="http://research.cs.wisc.edu/adsl/Publications/latent-sigmetrics07.pdf">An
-analysis of latent sector errors in disk drives</a> by
-L. N. Bairavasundaram, G. R. Goodson, S. Pasupathy, and J. Schindler</li>
-
-</ul>
-
-<p>Several of these research papers are based on data collected from
-hundred thousands or millions of disk, and their findings are eye
-opening. The short story is simply do not implicitly trust RAID or
-redundant storage systems. Details matter. And unfortunately there
-are few options on Linux addressing all the identified issues. Both
-ZFS and Btrfs are doing a fairly good job, but have legal and
-practical issues on their own. I wonder how cluster file systems like
-Ceph do in this regard. After all, there is an old saying, you know
-you have a distributed system when the crash of a computer you have
-never heard of stops you from getting any work done. The same holds
-true if fault tolerance do not work.</p>
-
-<p>Just remember, in the end, it do not matter how redundant, or how
-fault tolerant your storage is, if you do not continuously monitor its
-status to detect and replace failed disks.</p>
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Why_is_your_site_not_using_Content_Security_Policy___CSP_.html">Why is your site not using Content Security Policy / CSP?</a></div>
+ <div class="date"> 9th December 2018</div>
+ <div class="body"><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
<div class="tags">
- Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/raid">raid</a>, <a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin</a>.
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/standard">standard</a>, <a href="http://people.skolelinux.org/pere/blog/tags/web">web</a>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Web_services_for_writing_academic_LaTeX_papers_as_a_team.html">Web services for writing academic LaTeX papers as a team</a></div>
- <div class="date">31st October 2017</div>
- <div class="body"><p>I was surprised today to learn that a friend in academia did not
-know there are easily available web services available for writing
-LaTeX documents as a team. I thought it was common knowledge, but to
-make sure at least my readers are aware of it, I would like to mention
-these useful services for writing LaTeX documents. Some of them even
-provide a WYSIWYG editor to ease writing even further.</p>
-
-<p>There are two commercial services available,
-<a href="https://sharelatex.com">ShareLaTeX</a> and
-<a href="https://overleaf.com">Overleaf</a>. They are very easy to
-use. Just start a new document, select which publisher to write for
-(ie which LaTeX style to use), and start writing. Note, these two
-have announced their intention to join forces, so soon it will only be
-one joint service. I've used both for different documents, and they
-work just fine. While
-<a href="https://github.com/sharelatex/sharelatex">ShareLaTeX is free
-software</a>, while the latter is not. According to <a
-href="https://www.overleaf.com/help/17-is-overleaf-open-source">a
-announcement from Overleaf</a>, they plan to keep the ShareLaTeX code
-base maintained as free software.</p>
-
-But these two are not the only alternatives.
-<a href="https://app.fiduswriter.org/">Fidus Writer</a> is another free
-software solution with <a href="https://github.com/fiduswriter">the
-source available on github</a>. I have not used it myself. Several
-others can be found on the nice
-<a href="https://alternativeto.net/software/sharelatex/">alterntiveTo
-web service</a>.
-
-<p>If you like Google Docs or Etherpad, but would like to write
-documents in LaTeX, you should check out these services. You can even
-host your own, if you want to. :)</p>
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/New_and_improved_Frikanalen_Kodi_addon_version_0_0_3.html">New and improved Frikanalen Kodi addon version 0.0.3</a></div>
+ <div class="date"> 8th November 2018</div>
+ <div class="body"><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
<div class="tags">
- Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen</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>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Locating_IMDB_IDs_of_movies_in_the_Internet_Archive_using_Wikidata.html">Locating IMDB IDs of movies in the Internet Archive using Wikidata</a></div>
- <div class="date">25th October 2017</div>
- <div class="body"><p>Recently, I needed to automatically check the copyright status of a
-set of <a href="http://www.imdb.com/">The Internet Movie database
-(IMDB)</a> entries, to figure out which one of the movies they refer
-to can be freely distributed on the Internet. This proved to be
-harder than it sounds. IMDB for sure list movies without any
-copyright protection, where the copyright protection has expired or
-where the movie is lisenced using a permissive license like one from
-Creative Commons. These are mixed with copyright protected movies,
-and there seem to be no way to separate these classes of movies using
-the information in IMDB.</p>
-
-<p>First I tried to look up entries manually in IMDB,
-<a href="https://www.wikipedia.org/">Wikipedia</a> and
-<a href="https://www.archive.org/">The Internet Archive</a>, to get a
-feel how to do this. It is hard to know for sure using these sources,
-but it should be possible to be reasonable confident a movie is "out
-of copyright" with a few hours work per movie. As I needed to check
-almost 20,000 entries, this approach was not sustainable. I simply
-can not work around the clock for about 6 years to check this data
-set.</p>
-
-<p>I asked the people behind The Internet Archive if they could
-introduce a new metadata field in their metadata XML for IMDB ID, but
-was told that they leave it completely to the uploaders to update the
-metadata. Some of the metadata entries had IMDB links in the
-description, but I found no way to download all metadata files in bulk
-to locate those ones and put that approach aside.</p>
-
-<p>In the process I noticed several Wikipedia articles about movies
-had links to both IMDB and The Internet Archive, and it occured to me
-that I could use the Wikipedia RDF data set to locate entries with
-both, to at least get a lower bound on the number of movies on The
-Internet Archive with a IMDB ID. This is useful based on the
-assumption that movies distributed by The Internet Archive can be
-legally distributed on the Internet. With some help from the RDF
-community (thank you DanC), I was able to come up with this query to
-pass to <a href="https://query.wikidata.org/">the SPARQL interface on
-Wikidata</a>:
-
-<p><pre>
-SELECT ?work ?imdb ?ia ?when ?label
-WHERE
-{
- ?work wdt:P31/wdt:P279* wd:Q11424.
- ?work wdt:P345 ?imdb.
- ?work wdt:P724 ?ia.
- OPTIONAL {
- ?work wdt:P577 ?when.
- ?work rdfs:label ?label.
- FILTER(LANG(?label) = "en").
- }
-}
-</pre></p>
-
-<p>If I understand the query right, for every film entry anywhere in
-Wikpedia, it will return the IMDB ID and The Internet Archive ID, and
-when the movie was released and its English title, if either or both
-of the latter two are available. At the moment the result set contain
-2338 entries. Of course, it depend on volunteers including both
-correct IMDB and The Internet Archive IDs in the wikipedia articles
-for the movie. It should be noted that the result will include
-duplicates if the movie have entries in several languages. There are
-some bogus entries, either because The Internet Archive ID contain a
-typo or because the movie is not available from The Internet Archive.
-I did not verify the IMDB IDs, as I am unsure how to do that
-automatically.</p>
-
-<p>I wrote a small python script to extract the data set from Wikidata
-and check if the XML metadata for the movie is available from The
-Internet Archive, and after around 1.5 hour it produced a list of 2097
-free movies and their IMDB ID. In total, 171 entries in Wikidata lack
-the refered Internet Archive entry. I assume the 70 "disappearing"
-entries (ie 2338-2097-171) are duplicate entries.</p>
-
-<p>This is not too bad, given that The Internet Archive report to
-contain <a href="https://archive.org/details/feature_films">5331
-feature films</a> at the moment, but it also mean more than 3000
-movies are missing on Wikipedia or are missing the pair of references
-on Wikipedia.</p>
-
-<p>I was curious about the distribution by release year, and made a
-little graph to show how the amount of free movies is spread over the
-years:<p>
-
-<p><img src="http://people.skolelinux.org/pere/blog/images/2017-10-25-verk-i-det-fri-filmer.png"></p>
-
-<p>I expect the relative distribution of the remaining 3000 movies to
-be similar.</p>
-
-<p>If you want to help, and want to ensure Wikipedia can be used to
-cross reference The Internet Archive and The Internet Movie Database,
-please make sure entries like this are listed under the "External
-links" heading on the Wikipedia article for the movie:</p>
-
-<p><pre>
-* {{Internet Archive film|id=FightingLady}}
-* {{IMDb title|id=0036823|title=The Fighting Lady}}
-</pre></p>
-
-<p>Please verify the links on the final page, to make sure you did not
-introduce a typo.</p>
-
-<p>Here is the complete list, if you want to correct the 171
-identified Wikipedia entries with broken links to The Internet
-Archive: <a href="http://www.wikidata.org/entity/Q1140317">Q1140317</a>,
-<a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
-<a href="http://www.wikidata.org/entity/Q458656">Q458656</a>,
-<a href="http://www.wikidata.org/entity/Q470560">Q470560</a>,
-<a href="http://www.wikidata.org/entity/Q743340">Q743340</a>,
-<a href="http://www.wikidata.org/entity/Q822580">Q822580</a>,
-<a href="http://www.wikidata.org/entity/Q480696">Q480696</a>,
-<a href="http://www.wikidata.org/entity/Q128761">Q128761</a>,
-<a href="http://www.wikidata.org/entity/Q1307059">Q1307059</a>,
-<a href="http://www.wikidata.org/entity/Q1335091">Q1335091</a>,
-<a href="http://www.wikidata.org/entity/Q1537166">Q1537166</a>,
-<a href="http://www.wikidata.org/entity/Q1438334">Q1438334</a>,
-<a href="http://www.wikidata.org/entity/Q1479751">Q1479751</a>,
-<a href="http://www.wikidata.org/entity/Q1497200">Q1497200</a>,
-<a href="http://www.wikidata.org/entity/Q1498122">Q1498122</a>,
-<a href="http://www.wikidata.org/entity/Q865973">Q865973</a>,
-<a href="http://www.wikidata.org/entity/Q834269">Q834269</a>,
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+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Time_for_an_official_MIME_type_for_patches_.html">Time for an official MIME type for patches?</a></div>
+ <div class="date"> 1st November 2018</div>
+ <div class="body"><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
<div class="tags">
- 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>, <a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri</a>.
+ 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/standard">standard</a>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/A_one_way_wall_on_the_border_.html">A one-way wall on the border?</a></div>
- <div class="date">14th October 2017</div>
- <div class="body"><p>I find it fascinating how many of the people being locked inside
-the proposed border wall between USA and Mexico support the idea. The
-proposal to keep Mexicans out reminds me of
-<a href="http://www.history.com/news/10-things-you-may-not-know-about-the-berlin-wall">the
-propaganda twist from the East Germany government</a> calling the wall
-the “Antifascist Bulwark” after erecting the Berlin Wall, claiming
-that the wall was erected to keep enemies from creeping into East
-Germany, while it was obvious to the people locked inside it that it
-was erected to keep the people from escaping.</p>
-
-<p>Do the people in USA supporting this wall really believe it is a
-one way wall, only keeping people on the outside from getting in,
-while not keeping people in the inside from getting out?</p>
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html">Measuring the speaker frequency response using the AUDMES free software GUI - nice free software</a></div>
+ <div class="date">22nd October 2018</div>
+ <div class="body"><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
<div class="tags">
- Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software</a>.
</div>
<div class="padding"></div>
<div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Generating_3D_prints_in_Debian_using_Cura_and_Slic3r__prusa_.html">Generating 3D prints in Debian using Cura and Slic3r(-prusa)</a></div>
- <div class="date"> 9th October 2017</div>
- <div class="body"><p>At my nearby maker space,
-<a href="http://sonen.ifi.uio.no/">Sonen</a>, I heard the story that it
-was easier to generate gcode files for theyr 3D printers (Ultimake 2+)
-on Windows and MacOS X than Linux, because the software involved had
-to be manually compiled and set up on Linux while premade packages
-worked out of the box on Windows and MacOS X. I found this annoying,
-as the software involved,
-<a href="https://github.com/Ultimaker/Cura">Cura</a>, is free software
-and should be trivial to get up and running on Linux if someone took
-the time to package it for the relevant distributions. I even found
-<a href="https://bugs.debian.org/706656">a request for adding into
-Debian</a> from 2013, which had seem some activity over the years but
-never resulted in the software showing up in Debian. So a few days
-ago I offered my help to try to improve the situation.</p>
-
-<p>Now I am very happy to see that all the packages required by a
-working Cura in Debian are uploaded into Debian and waiting in the NEW
-queue for the ftpmasters to have a look. You can track the progress
-on
-<a href="https://qa.debian.org/developer.php?email=3dprinter-general%40lists.alioth.debian.org">the
-status page for the 3D printer team</a>.</p>
-
-<p>The uploaded packages are a bit behind upstream, and was uploaded
-now to get slots in <a href="https://ftp-master.debian.org/new.html">the NEW
-queue</a> while we work up updating the packages to the latest
-upstream version.</p>
-
-<p>On a related note, two competitors for Cura, which I found harder
-to use and was unable to configure correctly for Ultimaker 2+ in the
-short time I spent on it, are already in Debian. If you are looking
-for 3D printer "slicers" and want something already available in
-Debian, check out
-<a href="https://tracker.debian.org/pkg/slic3r">slic3r</a> and
-<a href="https://tracker.debian.org/pkg/slic3r-prusa">slic3r-prusa</a>.
-The latter is a fork of the former.</p>
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Web_browser_integration_of_VLC_with_Bittorrent_support.html">Web browser integration of VLC with Bittorrent support</a></div>
+ <div class="date">21st October 2018</div>
+ <div class="body"><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
<div class="tags">
- Tags: <a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
+ 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>.
</div>
<h2>Archive</h2>
<ul>
+<li>2019
+<ul>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2019/01/">January (2)</a></li>
+
+</ul></li>
+
+<li>2018
+<ul>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2018/12/">December (4)</a></li>
+
+</ul></li>
+
<li>2017
<ul>
<li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
-<li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (3)</a></li>
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
</ul></li>
<h2>Tags</h2>
<ul>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (15)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (10)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (155)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (165)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (24)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (25)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (363)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (396)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (14)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (31)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (33)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (20)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi (4)</a></li>
+
<li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (42)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (11)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (293)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (301)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (189)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (192)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (34)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (69)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (73)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (104)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (108)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (6)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (53)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (55)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (58)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (52)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (55)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (8)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (15)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (60)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (73)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
</ul>