Beirdobot, irc.freenode.net

Monday, September 7th, 2015, 02:06 UTC

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[08:05:08]

stuarta:

stuartm: i didn't think we handled changing transports at all

[08:06:13]

stuartm:

yeah, I vaguely recall that being the case now

[08:06:22]

stuartm:

something we need to fix :/

[08:08:58]

stuarta:

i have some vague plans on how to implement it, but it's not gunna happen in the 0.28 timeframe

[08:11:11]

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[08:11:25]

stuarta:

something along the lines of when we are scanning for EIT data, we also collect the relevant tables that describe the mux

[08:11:45]

stuarta:

so we later "housekeep" it and put in changes

[08:11:55]

** stuarta goes to make cuppa **

[08:19:18]

stuartm:

for 0.28, I'd do some simple stuff like UPDATE dtv_multiplex SET frequency={foo} WHERE mplex_id={id};

[08:20:46]

stuarta:

in the scanner? that would work

[08:22:06]

stuartm:

I need to get in there and see how it should best be handled, we would have to apply that before the channel checks and to avoid the 'duplicate' channels being created

[08:22:28]

stuartm:

it would cover 99% of cases and fix the issue I saw over the weekend

[08:24:47]

stuarta:

yeah, it makes sense to fix the mplex's first, then the channels

[08:26:05]

Roklobsta:

ahem. so when on release of 0.28?

[08:26:19]

** stuarta shrugs **

[08:26:48]

Roklobsta:

well

[08:26:49]

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[08:26:58]

stuarta:

it's not currently ready to release, gigem's been busy breaking diseq ;-)

[08:27:04]

Roklobsta:

it's been pretty good so far

[08:27:11]

Roklobsta:

ok i won't update for a while

[08:27:50]

Roklobsta:

WAF is good

[08:28:03]

stuarta:

you don't use diseq surely?

[08:28:20]

stuarta:

*diseqc

[08:29:50]

Roklobsta:

er no

[08:29:57]

Roklobsta:

just DVB-T

[08:30:13]

** Roklobsta googles diseqc **

[08:30:38]

Roklobsta:

definitely not

[08:30:59]

Roklobsta:

still need to get CEC and Pulse8 working

[08:31:17]

Roklobsta:

so we can chuck the harmony 525

[08:33:36]

Roklobsta:

thought would i be correct in saying CEC development in myth is stunted?

[08:33:53]

stuarta:

i don't know any dev that has one

[08:34:13]

Roklobsta:

pfffffft.... what CEC is used by you guys? RPI? Something else?

[08:34:25]

** stuarta googles CEC **

[08:34:31]

Roklobsta:

hdmi-cec

[08:34:41]

Roklobsta:

you know, one remote -> many things

[08:35:05]

Roklobsta:

that ISN'T some LIRC abomination

[08:35:07]

stuartm:

Roklobsta: I don't use CEC, I don't know who does ...

[08:35:14]

stuarta:

i don't even use a remote

[08:35:20]

Roklobsta:

telepathy?

[08:35:25]

stuarta:

wireless keyboard

[08:35:41]

Roklobsta:

that's so unglamourous

[08:35:42]

stuarta:

now i do have an mce remote on my desk....

[08:35:57]

stuarta:

i've just not ever been bothered to get it to work

[08:36:01]

stuarta:

maybe i should

[08:36:09]

stuarta:

that whole area is a royal pain

[08:36:11]

stuartm:

device support for CEC is still surprisingly limited – my cable STB doesn't support it, my blu-ray player does but minimally

[08:36:30]

Roklobsta:

my TV does so i just wanna run it all from one remote

[08:37:04]

stuartm:

my TV does too, but if the connected devices don't then it's pointless :(

[08:37:09]

Roklobsta:

so apart from keyboards and lirc/harmony nightmares what is good to control myth wyth?

[08:37:56]

stuartm:

all-in-one remote is the solution here, a simple Â£15 three device remote which uses the mce codes for mythtv

[08:37:57]

stuarta:

telepathy ;-)

[08:38:23]

Roklobsta:

stuartm: before i get violent does it control the tv too?

[08:38:27]

stuartm:

still involves lirc, but I've not had to touch my lirc config in years

[08:38:35]

stuartm:

Roklobsta: of course

[08:43:14]

stuartm:

in fact I've got it programmed so that volume/mute always control the TV setting, then you just switch modes to control the different devices (MythTV, STB, TV, Blu-ray) – yes, the astute observer will note that is four devices and I said it was a three device remote, that's because I don't actually use it to control the STB currently but four device versions of the same remote are available, costing Â£18 iirc, I plan to replace this one with

[08:43:16]

stuartm:

that version soontm

[08:44:34]

stuartm:

it's not a perfect solution, but it's flaws are shared with CEC – i.e. Remote lacks dedicated buttons for device specific features

[08:45:52]

stuartm:

http://www.amazon.co.uk/gp/product/B003NSIE54

[08:47:23]

stuartm:

one thing that I don't think it does (only had it a couple of days) is auto-switching input when you switch mode, now if it does that it would be better

[08:48:21]

stuartm:

something like this might do the job – http://www.amazon.co.uk/gp/product/B0030GDLYS

[08:48:48]

stuartm:

with that you start straying into Harmony territory, albeit cheaper

[08:50:13]

stuartm:

hmm, might try that version for the living room

[08:54:14]

Roklobsta:

bbl dinner

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[16:19:30]

gigem:

stuartm: I think it's functional now. We should find out soon.

[16:48:33]

gigem:

stuarta: ^^^

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[19:33:51]

dekarl:

stuarta, stuartm, UPDATE dtv_multiplex SET frequency={foo} WHERE mplex_id={id}; is going to be a tough one, see e.g. #12107

[19:33:51]

** MythLogBot http://code.mythtv.org/trac/ticket/12107 **

[19:36:09]

stuartm:

true, although it doesn't make the situation worse, it just doesn't fix that particular problem either

[19:37:32]

dekarl:

so imho for the scanner the primary key of a transport is "(diseqc leaf node +) frequency" for common DVB devices

[19:38:36]

stuartm:

depending on the current structure of the scanner, it may be feasible to do the strongest signal check while making that change ... but we would definitely need some way to associate channels with the right transport during the scanning process so we don't end up getting local channel A attached to transmitter B

[19:39:06]

dekarl:

maybe #10217 is all it needs? (funny how the channel scanner issue numbers are anagrams? ^^)

[19:39:06]

** MythLogBot http://code.mythtv.org/trac/ticket/10217 **

[19:42:22]

stuartm:

dekarl: you may be right, but that feels hacky (diseqc + frequency), I've a feeling there is a more elegant solution possible if we change the scanning table schema, maybe by not normalising the data to the point where we need a complex identifier to relate a particular channel back to the transport it was carried on

[19:44:11]

stuartm:

I'm not able to see the relevant parts of #10217 ?

[19:44:11]

** MythLogBot http://code.mythtv.org/trac/ticket/10217 **

[19:44:57]

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[19:46:06]

stuartm:

each transmitter should carry a unique identifier, which we don't really make use of ... or is that only in the UK?

[19:46:26]

stuartm:

I can't remember the descriptor offhand without referring to the spec

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[19:59:24]

stuarta:

our channel scanner has quite a few krufty edges

[20:18:05]

enyc:

=)

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[21:02:04]

dekarl:

stuartm, thats the problem... its a tv standard, aka lots of different ways to reach the same destination... one identifier is with cell_id, the other is just onid+tsid or you use the frequency

[21:09:09]

stuartm:

UK used to include a descriptor with both an id and the name of the transmitter, I don't recall seeing that the last time I looked at the broadcast tables

[21:09:23]

stuarta:

i don't remember ever seeing one of those

[21:09:49]

stuarta:

although the NIT iirc, does have the name of the transmitter in it.

[21:09:53]

stuarta:

lemme find some logs

[21:13:37]

stuarta:

NetworkNameDescriptor: London

[21:14:07]

stuarta:

that's in my NIT(s)

[21:14:23]

stuartm:

That might be what I was thinking of, no numeric identifier to go with it?

[21:15:27]

stuarta:

http://fpaste.org/264590/16605221/

[21:15:47]

stuarta:

quite a bit of info in descriptors we don't parse

[21:16:42]

stuarta:

Descriptor (0x7f) looks worthwile enhancing

[21:20:28]

stuartm:

yeah, at a minimum, we could use the name to distinguish between different broadcast regions – at the end of scanning a prompt saying "We found channels from multiple broadcast regions, which region do you want to use?"

[21:22:14]

stuartm:

but looking at the ETSI spec, you don't get more than a string descriptor, the additional region/descriptive info included in 0x7f is non-standard by the look of it

[21:23:08]

stuartm:

doesn't mean we can use it where it's available

[21:23:09]

stuarta:

no it's standard

[21:23:22]

stuarta:

0x7f is extended descriptor

[21:23:34]

stuarta:

the first byte specifies what it's extending

[21:23:59]

stuarta:

look at EN300–468 section 6.3

[21:25:44]

stuarta:

as well as 6.2.16

[21:26:26]

stuarta:

so 0x0a = target_region_name_descriptor (that's the long one)

[21:26:26]

stuartm:

right, I saw that but it's marked as reserved in the 2012 spec unless I'm reading it wrong

[21:26:49]

stuarta:

so i'm reading v1.12.1

[21:27:07]

stuartm:

ah, you're right, I mis-read the byte from the paste

[21:28:39]

stuartm:

so the target_region_descriptor is actually better than the network_name_descriptor, although I think both are useful

[21:29:07]

stuarta:

target_region_descriptor is the one that says GBR

[21:29:17]

stuartm:

would be good to get some samples from around the country to see exactly what the possible values are

[21:29:49]

stuarta:

target_region_name_descriptor is the one that contains "GBRengGEngland London...Greater.London"

[21:30:59]

stuarta:

aka crystal palace

[21:31:25]

stuarta:

interesting that snippet also contains a network_change_notify_descriptor

[21:32:06]

stuarta:

that's the one starting 07

[21:32:07]

stuartm:

darn ... spec was more promising than the reality

[21:35:31]

stuartm:

may be better in the SDT or BAT

[21:35:44]

stuarta:

BAT is only dvb-s(2)

[21:36:29]

stuarta:

bat is also useful tho, give use the regional groups, ie scottish versions of bbc by default, or welsh ones etc

[21:36:42]

stuartm:

aye that's what I'm wondering about

[21:36:46]

stuarta:

i have a few of those kicking about

[21:37:03]

stuarta:

they are all signalled all the time, so pretty easy to pull one down with dvbsnoop

[21:38:38]

stuartm:

yeah, I'll go fishing tomorrow, time for bed

[21:39:25]

stuarta:

indeed. bed time for me too

[21:39:25]

stuarta:

nn

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MythLogBot@irc.freenode.net :: #mythtv

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