[linux-dvb] New tuning file for Astra 28.2E

[Christoph Pfister]

Hi,

Hi!
Please find attached a more complete tuning file for Astra 28.2E.

Is that really needed? NIT linking exists which allows the scan apps to find
the other transponders (ideally from a single initial tuning entry).
Of course some providers manage to mess stuff up so that you need more (or
all) entries to get the full channel list. So to change anything I need some
results from testing ...

Regards,
Marvin Hankley

Christoph

[Zoilo Gomez]

Post by Christoph Pfister
Hi,

Hi!
Please find attached a more complete tuning file for Astra 28.2E.

Is that really needed? NIT linking exists which allows the scan apps to find
the other transponders (ideally from a single initial tuning entry).
Of course some providers manage to mess stuff up so that you need more (or
all) entries to get the full channel list.

Exactly; NITs seem to be incomplete all the time ... as of yet I still
have to see my first complete scan that is based on an ideal single
initial tuning entry on any satellite!

Am I correct in thinking that things seem to change often as well?

Another notorious mess is the new Astra 23E5 ... will post a frequency
list for that one as soon as I have time to investigate it.

Z.

[P. van Gaans]

Post by Zoilo Gomez

Post by Christoph Pfister
Hi,

Hi!
Please find attached a more complete tuning file for Astra 28.2E.

Is that really needed? NIT linking exists which allows the scan apps to find
the other transponders (ideally from a single initial tuning entry).
Of course some providers manage to mess stuff up so that you need more (or
all) entries to get the full channel list.

Exactly; NITs seem to be incomplete all the time ... as of yet I still
have to see my first complete scan that is based on an ideal single
initial tuning entry on any satellite!
Am I correct in thinking that things seem to change often as well?
Another notorious mess is the new Astra 23E5 ... will post a frequency
list for that one as soon as I have time to investigate it.
Z.
_______________________________________________
linux-dvb mailing list
http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb

When I did a scan on the Hot Bird satellite with Kaffeine, I only found
10 channels. There was no NIT available at all. After searching for the
transponder with the NIT info for a while I gave up, loaded the
transponder file from
http://joshyfun.peque.org/transponders/kaffeine.html and completed the
scan..

[Christoph Pfister]

Post by Zoilo Gomez

Post by Christoph Pfister
Hi,

Hi!
Please find attached a more complete tuning file for Astra 28.2E.

Is that really needed? NIT linking exists which allows the scan apps to
find the other transponders (ideally from a single initial tuning entry).
Of course some providers manage to mess stuff up so that you need more
(or all) entries to get the full channel list.

Exactly; NITs seem to be incomplete all the time ... as of yet I still
have to see my first complete scan that is based on an ideal single
initial tuning entry on any satellite!

Astra 19.2e is quite reliable (right, two initial entries but not changed for
quite some time).

Post by Zoilo Gomez
Am I correct in thinking that things seem to change often as well?

They seem to be messed up more and more recently :(

Post by Zoilo Gomez
Another notorious mess is the new Astra 23E5 ... will post a frequency
list for that one as soon as I have time to investigate it.
Z.

Christoph

[Tony Grant]

Post by Christoph Pfister
Astra 19.2e is quite reliable (right, two initial entries but not changed for
quite some time).

I moved to the south and pointed at 19.2 - no problems

I can not see 28.2... I will work on it some more this week.

Tony

--

[Christoph Pfister]

Hi,

Hi!

Post by Christoph Pfister
Is that really needed? NIT linking exists which allows the scan apps to
find the other transponders (ideally from a single initial tuning entry).
Of course some providers manage to mess stuff up so that you need more
(or all) entries to get the full channel list. So to change anything I
need some results from testing ...

From my initial testing, the original file was not enabling scan to
find all the present transponders.

Ok ...

So, I made the complete list. I
know scan is capable of detecting other transponders from a smaller
number but do we lose anything from having a more complete list than
is strictly necessary?

The problem arises when some of them become invalid because you get timeouts
then. It's also a bit more difficult to maintain them (but that's the case
anyway ;) - hmm, will see and think a bit about this ... the main issue
remains: where to get an authoritative source of information?

Cheers,
Marv

Christoph

[Marvin Hankley]

Hi!

Post by Christoph Pfister

So, I made the complete list. I
know scan is capable of detecting other transponders from a smaller
number but do we lose anything from having a more complete list than
is strictly necessary?

The problem arises when some of them become invalid because you get timeouts
then. It's also a bit more difficult to maintain them (but that's the case
anyway ;) - hmm, will see and think a bit about this ... the main issue
remains: where to get an authoritative source of information?

Right, that is a problem, so I guess there must be some balance
between receiving timeouts on one hand and not receiving the full list
of channels on the other hand. Personally, I'd be slightly inclined
towards enabling users to get the full list of channels. I'd think
re-scanning is not something people are going to do too often, so
perhaps if it might potentially take a little longer, that could be a
price worth paying, in order to get the full list of channels?

Another potential good use for a complete list is when searching for
feeds. These transponders tend to be only used occasionally and I
doubt they will appear in NITs. So, I suspect that the only way of
detecting these channels will be to manually scan the transponder
list.

Given all that, these are just text files in some obscure corner of
the filesystem. My full list containing all the transponders from the
four satellites at 28.2E was only 4 Kb, so perhaps it might be
feasible to ship _two_ channel lists, where available? A minimal
starter file and, where available, a more complete list?

I'm not aware of any authoritative source of information. What I used
to produce my list was a combination of two internet sites,
http://www.lyngsat.com/ and http://en.kingofsat.net/ (another good one
is http://www.satcodx.com/ ), and then verifying those against the
satellite itself.

Cheers,
Marv

[Christoph Pfister]

Hi,

Post by Marvin Hankley
Hi!

Post by Christoph Pfister

So, I made the complete list. I
know scan is capable of detecting other transponders from a smaller
number but do we lose anything from having a more complete list than
is strictly necessary?

The problem arises when some of them become invalid because you get
timeouts then. It's also a bit more difficult to maintain them (but
that's the case anyway ;) - hmm, will see and think a bit about this ...
the main issue remains: where to get an authoritative source of
information?

Right, that is a problem, so I guess there must be some balance
between receiving timeouts on one hand and not receiving the full list
of channels on the other hand. Personally, I'd be slightly inclined
towards enabling users to get the full list of channels. I'd think
re-scanning is not something people are going to do too often, so
perhaps if it might potentially take a little longer, that could be a
price worth paying, in order to get the full list of channels?
Another potential good use for a complete list is when searching for
feeds. These transponders tend to be only used occasionally and I
doubt they will appear in NITs. So, I suspect that the only way of
detecting these channels will be to manually scan the transponder
list.
Given all that, these are just text files in some obscure corner of
the filesystem. My full list containing all the transponders from the
four satellites at 28.2E was only 4 Kb, so perhaps it might be
feasible to ship _two_ channel lists, where available? A minimal
starter file and, where available, a more complete list?
I'm not aware of any authoritative source of information. What I used
to produce my list was a combination of two internet sites,
http://www.lyngsat.com/ and http://en.kingofsat.net/ (another good one
is http://www.satcodx.com/ ), and then verifying those against the
satellite itself.
Cheers,
Marv

Right, so I'll apply your file (as there is no better option I can think of).
Hmm, maybe a small tool that helps people to check whether their scan file is
still ok or to actually produce a valid&correct scan file (from another scan
file or whatever) would be feasible - let's see ... (this should simplify
users to deal with that stuff so that more involvement is possible in cases
where no authoritative source of information exists).

Thanks,

Christoph