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How to read teletext?

teletext tuxtxt

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#1 Dreambox_user

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Posted 19 January 2012 - 15:05

Hello,
I'd like to read all text which is available on a single page on Teletext and save it to a text file.
Can anybody tell me how to do it?

Many thanks for any advice on this matter!

Re: How to read teletext? #2 Erik Slagter

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Posted 19 January 2012 - 15:43

Not with standard enigma. Maybe copy and paste from the webinterface...

I have a program in C that reads the transport streams and converts teletext subtitles to srt subs. You might want to use that as a starting point to decode complete pages. Subtitles are also complete pages, but most of the page is tranparent.

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
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Re: How to read teletext? #3 Dreambox_user

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Posted 19 January 2012 - 15:57

Do you mean that file http://openpli.git.s...e7bad2f85e85f12 ? (tuxtxt.c) ?

Re: How to read teletext? #4 Erik Slagter

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Posted 19 January 2012 - 20:13

No, but probably you can use that as well. It's something I wrote myself.

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
I don't read PM -> if you have something to ask or to report, do it in the forum so others can benefit. I don't take freelance jobs.
Ik lees geen PM -> als je iets te vragen of te melden hebt, doe het op het forum, zodat anderen er ook wat aan hebben.


Re: How to read teletext? #5 littlesat

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Posted 19 January 2012 - 20:23

Isn't it possible to make some logs from teletekst with dvbsnoop?

WaveFrontier 28.2E | 23.5E | 19.2E | 16E | 13E | 10/9E | 7E | 5E | 1W | 4/5W | 15W


Re: How to read teletext? #6 Erik Slagter

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Posted 19 January 2012 - 20:25

Yes it is I assume, BUT please note you will decapsulate at least one level of hamming coded bits... A simple ascii dump won't do!

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
I don't read PM -> if you have something to ask or to report, do it in the forum so others can benefit. I don't take freelance jobs.
Ik lees geen PM -> als je iets te vragen of te melden hebt, doe het op het forum, zodat anderen er ook wat aan hebben.


Re: How to read teletext? #7 Dreambox_user

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Posted 20 January 2012 - 11:34

Erik,
could you share with me your program? :)

Re: How to read teletext? #8 Erik Slagter

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Posted 20 January 2012 - 12:04

http://erikslag.home....nl/dvb2srt.tgz

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
I don't read PM -> if you have something to ask or to report, do it in the forum so others can benefit. I don't take freelance jobs.
Ik lees geen PM -> als je iets te vragen of te melden hebt, doe het op het forum, zodat anderen er ook wat aan hebben.


Re: How to read teletext? #9 Dreambox_user

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Posted 20 January 2012 - 16:26

Thanks :)
Can you give me some advices how to use it in dbox?

Re: How to read teletext? #10 Erik Slagter

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Posted 20 January 2012 - 17:20

No, I don't know...

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
I don't read PM -> if you have something to ask or to report, do it in the forum so others can benefit. I don't take freelance jobs.
Ik lees geen PM -> als je iets te vragen of te melden hebt, doe het op het forum, zodat anderen er ook wat aan hebben.


Re: How to read teletext? #11 Dreambox_user

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Posted 23 January 2012 - 18:48

Can anybody tell me how to compile TuxTxt plugin using sources from here http://openpli.git.s...da7eb3092f73efd ?

Re: How to read teletext? #12 Erik Slagter

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Posted 23 January 2012 - 18:59

Just like the rest of the source. Install the complete build environment en run "make image". How to do that is in the wiki.

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
I don't read PM -> if you have something to ask or to report, do it in the forum so others can benefit. I don't take freelance jobs.
Ik lees geen PM -> als je iets te vragen of te melden hebt, doe het op het forum, zodat anderen er ook wat aan hebben.


Re: How to read teletext? #13 Dreambox_user

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Posted 26 January 2012 - 00:53

Ok, I know how to get text from teletext page. It looks like that:


  `pp0`p0`0 pp ppp pp p `0ppp
`pp0`p0`0 pp ppp pp p `0ppp
  "k7!sj5 jw{5##jw{5+t>!##
"k7!sj5 jw{5##jw{5+t>!##
  j5 ssjupjws1  jws1~'o4 
j5 ssjupjws1  jws1~'o4 
  "! "#!"## ## # ## # "! #
"! "#!"## ## # ## # "! #
 CHANNEL 4 (SKY)
CHANNEL 4 (SKY)



Racing 470 7#################5
Horoscopes 443 5 * * * * * * * 5
C4 Racing Sched'445 5 5
Chat Services 446 5 HEADLINES..470 5
TV Channels 457 5 5
Alerts 4415RESULTS....480 5


Does anybody know is it possible to grab text without sequence of chars like "k7!sj5 jw{5##jw{5+t>!## ?

Re: How to read teletext? #14 Dreambox_user

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Posted 26 January 2012 - 01:12

I have modified teletext plugin in Enigma (tuxtxt.c) and I need to debug this code while running on Dreambox. Would it be possible to give me some steps how to attach to gdb-server on Dreambox? In the perfect situation, I would like to connect from graphical IDE (e.g. Eclipse) and create breakpoints in the certain points of tuxtxt.c. I thank you in advance for your help.

Re: How to read teletext? #15 pieterg

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Posted 26 January 2012 - 10:30

If you have an openembedded image, gdbserver is either in the image, or in the feed.

here's how to use gdbserver:
http://www.delorie.c...dbserver.1.html

Re: How to read teletext? #16 Erik Slagter

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Posted 26 January 2012 - 11:50

Does anybody know is it possible to grab text without sequence of chars like "k7!sj5 jw{5##jw{5+t>!## ?

If you're seeing any ASCII-text that means at least you have the dehamming and parity handling working.

A teletext page is composed of ~26 lines (packets) which are often sent interleaved with other magazine's pages, are you cathering for that?

If you have a complete teletext page (i.e. packets 0 - 26) you should be able to extract the text packets (i.e. 1-23) and leave the rest alone, they are mostly metadata, FLOF text etc.

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
I don't read PM -> if you have something to ask or to report, do it in the forum so others can benefit. I don't take freelance jobs.
Ik lees geen PM -> als je iets te vragen of te melden hebt, doe het op het forum, zodat anderen er ook wat aan hebben.


Re: How to read teletext? #17 Dreambox_user

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Posted 26 January 2012 - 12:22

Which IDE do you guys use for development?

Re: How to read teletext? #18 Erik Slagter

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Posted 26 January 2012 - 12:25

vim

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
I don't read PM -> if you have something to ask or to report, do it in the forum so others can benefit. I don't take freelance jobs.
Ik lees geen PM -> als je iets te vragen of te melden hebt, doe het op het forum, zodat anderen er ook wat aan hebben.


Re: How to read teletext? #19 pieterg

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Posted 26 January 2012 - 12:46

kdevelop
But I don't often use an ide for development, only on devices where I don't have a decent console.
I find that nothing beats debug messages. Forces you to better look at your code and understand what it does ;)

Re: How to read teletext? #20 Erik Slagter

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Posted 26 January 2012 - 12:49

I find that nothing beats debug messages. Forces you to better look at your code and understand what it does ;)

I favour compiler warnings instead (for my own code).

* Wavefrontier T90 with 28E/23E/19E/13E via SCR switches 2 x 2 x 6 user bands
I don't read PM -> if you have something to ask or to report, do it in the forum so others can benefit. I don't take freelance jobs.
Ik lees geen PM -> als je iets te vragen of te melden hebt, doe het op het forum, zodat anderen er ook wat aan hebben.




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