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PostPosted: Tue Apr 19, 2005 3:54 pm 
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Joined: Tue Dec 28, 2004 2:25 pm
Posts: 17
I select the Video4Linux option and set up TV Guide information etc but when In Channel Editor and I am adding Channels it does not display any screen for entering Frequency / Bandwidth / Program ID / Video ID / Audio ID for a DVB-T card - i.e. each channel has a different value for these settings.

What am I doing wrong (using R5A12)?

My DVB-T card is based on the Philip SAA7134 chip. Looking at the startup text it is detected and added to video0 and vbi0 devices. It does say "No Multimedia Card Detected".

TIA


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PostPosted: Thu Apr 21, 2005 2:03 am 
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Joined: Wed Mar 03, 2004 7:43 pm
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Location: Sydney, Australia
pmk wrote:
I select the Video4Linux option
First mistake. V4L is only for cards that grab analogue data. (the composite video input on your card, which corresponds to the video0 device) For a DVB card, you need to select DVB.

Second problem is that, unless you add some modules into the boot sequence, R5A12 will not have loaded drivers for your card. What drivers depend on the model of the card. See these:

http://mysettopbox.tv/phpBB2/viewtopic. ... 2262#22262
http://mysettopbox.tv/phpBB2/viewtopic. ... b9676f9dd5
http://mysettopbox.tv/phpBB2/viewtopic. ... b9676f9dd5

for more info about what modules, or do a google search.

Third, the PIDs are hidden in MythTV 0.17 and later - there is no GUI editor for them because you don't need to enter them manually. 0.17 added a scan function. Just enter the frequency (and maybe bandwidth, depending on the card), and it finds all networks in that frequency's multiplex.

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| "Things you own end up owning you" - Tyler, Fight Club


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PostPosted: Thu Apr 21, 2005 9:11 am 
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Thanks for the information. Unfortunately I am no Linux expert so it goes a bit over my head.

I have tried searching for info regarding SAA7134 and the modules file but they are still referencing V4L instead of DVB-T. This chip must be used in many different cards not just DVB-T's.

If the next version of KnoppMyth has Kernel2.6 will this make it so all the drivers etc should automatically load? i.e. is it best to wait for a new version of KnoppMyth?

TIA


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PostPosted: Tue Apr 26, 2005 7:04 am 
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Location: Sydney, Australia
OK, so what card is it? Who is the manufacturer? What is the model?

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| Nigel Pearson, nigel.pearson.au@gmail.com
| "Things you own end up owning you" - Tyler, Fight Club


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PostPosted: Tue Apr 26, 2005 9:15 am 
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I have tried the new release and as I expected it still does not list a Multimedia Card.

The card is a LifeView FlyDVB-T based on the Philips SAA7134HL chip.
http://www.lifeview.com.tw/html/product ... lydvbt.htm

I can still see it saying "SAA7134 already loaded" during the startup but as you say this is not what I need. If I select "Card Type=DVB" and go through each card number (0-3) it says "Could Not Open" for each number.

I would appreciate any help as I am going round in circles. It does not help with all the acronyms etc I am not even sure where I should start even after reading your suggested URLs.

As a guess I need to edit the file /etc/modules, and add 2 lines:
dst
dvb-bt8xx

But when do I do this, what do these do and I assume I need a dvb-XXXXX specific to my card.

But the other threads seem to indicate I may need to run modprobe or even start recompiling MythTV.

I guess at least the new version of KnoppMyth has the 2.6 kernel I can ignore this step?

TIA


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PostPosted: Tue Apr 26, 2005 10:32 am 
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Location: Nashville, TN
the new version of knoppmyth has the 2.6 kernel, and mythtv is already compiled with dvb support in it so you can forget those two steps.

what putting the lines in /etc/modules does is make those modules get loaded on boot. it's basically the exact same thing as doing the modprobe blah exept that it will happen every boot automatically and you don't have to run the modprobe command everythime you reboot.

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PostPosted: Tue Apr 26, 2005 11:46 am 
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Okay so it sounds like if I do something with modprobe and I may get closer to finding out what I need to do. Any ideas what I should be modprobing (parameters)?

Really fundamental question -> is it possible to scroll up and down the boot text messages?

TIA


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PostPosted: Tue Apr 26, 2005 11:54 am 
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Joined: Tue Dec 07, 2004 12:04 pm
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Well, you can, after a fresh reboot, always `tail -1000 /var/log/messages|more` and 'dmesg > ~/boot_dmesg.txt;more boot_dmesg.txt'

-brendan


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PostPosted: Tue Apr 26, 2005 12:13 pm 
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I think I am getting somewhere I have three chips on the card

SAA7134HL is this SVIDEO port only?
TDA10046HT is this the DVB-T?
TDA8274 no idea?

So this means I may need drivers for the TDA10046 chip to get DVB working?

TIA


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PostPosted: Wed Apr 27, 2005 7:29 am 
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Location: Sydney, Australia
Silicon tuner. Hmmm. That is _very_ new technology. You may be out of luck for a while.

A quick google revealed no DVB drivers for this card. There are a few references to bttv driver modifications (i.e. using it with Video4Linux for capturing analog video) but it was unclear if that allowed analog TV reception. See:

http://www.linuxtv.org/pipermail/linux- ... 00702.html

You are correct about the the chip breakup. The problem is that the tuner, which in this card is a single chip, is something unique. Up until now, tuner cards have a big metal can full of RF electronics, driven by i2C bus circuitry, to do the tuning.

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| "Things you own end up owning you" - Tyler, Fight Club


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PostPosted: Wed Apr 27, 2005 11:48 am 
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Joined: Tue Dec 28, 2004 2:25 pm
Posts: 17
Thanks. It looks like both TDA chips are required for DVB-T. Unfortnately it does not have an analogue tuner on the card - just digital.

I have done a quick google and the last update was someone had a contact with Philips but nothing came of it. You have to sign NDAs etc to get the programming information for this chip.

I did a lot of research for this card and I thought I was successful in chosing a good one but as I was assuming it was SAA7134 that did all the work I am out of luck I think now.

It is a good card and it has great BDA drivers for Windows but my dream was for a Linux based system.

HTH


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