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MythTV og YouSee (DVB-C)



For nylig var der en der spurgte om DVB-C tuner kort til brug
med MythTV og YouSee.

Jeg blev inspireret til at købe sådan et kort selv, og har nu bakset
mig frem til at få de oplysninger der skulle til for at tune kanalerne
ind i YouSee.

Problemet for mig var at YouSee ikke oplyser hvilke frekvenser de
sender kanalerne på - på deres hjemmeside står der godt nok at man
skal bruge 143000 kHz, men det er kun nogle ganske få kanaler der
ligger der; tilsyneladende kun nok til at de kan bootstrap'e deres
egen SAGEM digital-tuner box.

Og jeg kunne ikke få MythTV til at scanne selv over alle frekvenser
(jeg har muligvis gjort noget galt).

Da det ikke var helt så enkelt som jeg troede, er her er lille
script til at scanne for alle de frekvenser, YouSee sender digitalt
TV ud på. Frekvenserne kan man så bruge bagefter, til at få 
MythTV til at finde kanalerne. Det kræver at man installerer
"scan" værktøjet fra dvb-apps pakken (Ubuntu).


#!/bin/sh

# YouSee har en liste over "netvaerksnumre".
# http://yousee.dk/privat/kundeservice/digi/faq.php?id=12459
# Her omtales at man bruger
# - Frekvens: 143000 kHz
# - Symbolrate: 68750
# - Modulation: 64
# Det giver en preliminaer kanal-definition, men der skal lige
# laves lidt enheds-konvertering (dvs: flere 0'er) for nogle
# af parametrene.

echo "C 143000000 6875000 NONE QAM64" >preliminary.conf
# Det her tager et kvarters tid.
scan -n -t 1 preliminary.conf | tee scanlog

# Traek de brugbare frekvenser af af listen
cut -d: -f2 scanlog | sort | uniq | \
while read F
do
  echo "C $F 6875000 NONE QAM64"
done >dk-yousee-cph.conf

# Som kontrol kan man scanne med kun disse frekvenser,
# det skal tage meget kortere tid.
scan dk-yousee-cph.conf > channels.conf

exit 0


Outputtet er "dk-yousee-cph.conf" filen med en liste frekvensnumre
og de andre parametre, man skal bruge i MythTV's channel setup
side. Her er den for København (YouSee's netværks-nummer 00101):

C 143000000 6875000 NONE QAM64
C 156000000 6875000 NONE QAM64
C 370000000 6875000 NONE QAM64
C 442000000 6875000 NONE QAM64
C 490000000 6875000 NONE QAM64
C 498000000 6875000 NONE QAM64
C 506000000 6875000 NONE QAM64
C 514000000 6875000 NONE QAM64
C 522000000 6875000 NONE QAM64
C 530000000 6875000 NONE QAM64
C 538000000 6875000 NONE QAM64
C 546000000 6875000 NONE QAM64
C 554000000 6875000 NONE QAM64
C 578000000 6875000 NONE QAM64
C 594000000 6875000 NONE QAM64
C 602000000 6875000 NONE QAM64
C 610000000 6875000 NONE QAM64
C 618000000 6875000 NONE QAM64
C 626000000 6875000 NONE QAM64
C 730000000 6875000 NONE QAM64
C 786000000 6875000 NONE QAM64


Mvh,
Henrik



 
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