Mailing List Archive: MythTV: Mythtvnz

USB DVB-S

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nick.rout at gmail

Jun 2, 2009, 2:00 PM

Post #1 of 7 (998 views)
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USB DVB-S

Have a friend who wants to run a myth backend on a small machine with
no PCI slot. (He lives in a housetruck).

Are there any USB DVB-S cards available for linux/mythtv?

Nick.

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tortise at paradise

Jun 3, 2009, 3:08 AM

Post #2 of 7 (932 views)
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Re: USB DVB-S [In reply to]

Nick
Would this do?
http://www.trademe.co.nz/Browse/Listing.aspx?id=221199060
Note it says Your Computer must have a USB 2.0 port.
Kind regards

----- Original Message -----
From: "Nick Rout" <nick.rout [at] gmail>
To: "MythTV in NZ" <mythtvnz [at] lists>
Sent: Wednesday, June 03, 2009 9:00 AM
Subject: [mythtvnz] USB DVB-S

Have a friend who wants to run a myth backend on a small machine with
no PCI slot. (He lives in a housetruck).

Are there any USB DVB-S cards available for linux/mythtv?

Nick.

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criggie at criggie

Jun 3, 2009, 3:17 AM

Post #3 of 7 (935 views)
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Re: USB DVB-S [In reply to]

Maybe - it all comes down to effective linux drivers.
I got one of those cheap genius ones, and while it worked under XP, it
needed significant CPU to drive. A P4M was just not enough, and forget
making it go in Linux.

Also Nick's friend will need to have his backend powered up and dish
aimed whenever something's on which is to be recorded.

Nick - if he has a base then that might be a better place to locate a
mythbox with capacious hard drive space. Or maybe mythtv is the wrong
tool for the job here.

Tortise wrote:
> Would this do?
> http://www.trademe.co.nz/Browse/Listing.aspx?id=221199060
> Note it says Your Computer must have a USB 2.0 port.

> ----- Original Message -----
> From: "Nick Rout" <nick.rout [at] gmail>
> To: "MythTV in NZ" <mythtvnz [at] lists>
> Sent: Wednesday, June 03, 2009 9:00 AM
> Subject: [mythtvnz] USB DVB-S
>
>
> Have a friend who wants to run a myth backend on a small machine with
> no PCI slot. (He lives in a housetruck).
> Are there any USB DVB-S cards available for linux/mythtv?

--
Criggie

http://criggie.dyndns.org/

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nick.rout at gmail

Jun 3, 2009, 1:13 PM

Post #4 of 7 (928 views)
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Re: USB DVB-S [In reply to]

On Wed, Jun 3, 2009 at 10:17 PM, criggie <criggie [at] criggie> wrote:
> Maybe - it all comes down to effective linux drivers.
> I got one of those cheap genius ones, and while it worked under XP, it
> needed significant CPU to drive. 鼦 P4M was just not enough, and forget
> making it go in Linux.
>
> Also Nick's friend will need to have his backend powered up and dish
> aimed whenever something's on which is to be recorded

I don't think he moves about a lot, its just that space is limited.

I do know you can get quite sophisticated sat dishes for caravans that
pop up and point themselves at the satellite automagically.

He was thinking of something like a eee box, which I believe has no pci slot.

Not sure about drivers for the one on trademe. Not even a brand name
mentioned IIRC.

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tortise at paradise

Jun 3, 2009, 1:27 PM

Post #5 of 7 (927 views)
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Re: USB DVB-S [In reply to]

Nick
There is also the Kaon 12V STB option, not really elegant and you'd have to treat it like a sky STB with composite video which might
create different problems, but maybe there is a way to take a USB composite feed that's easier than a USB DVB-S feed?
I guess you know about DiSEqC1.0/1.2 protocol and satellite dishes?

----- Original Message -----
From: "Nick Rout" <nick.rout [at] gmail>
To: "MythTV in NZ" <mythtvnz [at] lists>
Sent: Thursday, June 04, 2009 8:13 AM
Subject: Re: [mythtvnz] USB DVB-S

On Wed, Jun 3, 2009 at 10:17 PM, criggie <criggie [at] criggie> wrote:
> Maybe - it all comes down to effective linux drivers.
> I got one of those cheap genius ones, and while it worked under XP, it
> needed significant CPU to drive. A P4M was just not enough, and forget
> making it go in Linux.
>
> Also Nick's friend will need to have his backend powered up and dish
> aimed whenever something's on which is to be recorded

I don't think he moves about a lot, its just that space is limited.

I do know you can get quite sophisticated sat dishes for caravans that
pop up and point themselves at the satellite automagically.

He was thinking of something like a eee box, which I believe has no pci slot.

Not sure about drivers for the one on trademe. Not even a brand name
mentioned IIRC.

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nick.rout at gmail

Jun 3, 2009, 2:20 PM

Post #6 of 7 (925 views)
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Re: USB DVB-S [In reply to]

On Thu, Jun 4, 2009 at 8:27 AM, Tortise <tortise [at] paradise> wrote:
> Nick
> There is also the Kaon 12V STB option, not really elegant and you'd have to treat it like a sky STB with composite video which might
> create different problems, but maybe there is a way to take a USB composite feed that's easier than a USB DVB-S feed?

Personally I wouldn't recommend to anyone to take the analogue signal
and encode it back to digital when the digital signal is unencrypted
and freely available.

> I guess you know about DiSEqC1.0/1.2 protocol and satellite dishes?
>

I don't know anything specific, if you are hinting at some known
problem, let us know :)

Back to DVB-S USB I guess this
http://linuxtv.org/wiki/index.php/DVB-S_USB_Devices should be the
ultimate resource, however it is full of dead links and outdated info.

Parsing the pvrusb driver source would give some info perhaps, but in
the absence of advertisers on trademe giving accurate info its hard to
tie it back to a nameless product.

For $75 I am almost tempted to buy one and see, and flick it back on
trademe afterwards.

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tortise at paradise

Jun 4, 2009, 12:57 PM

Post #7 of 7 (920 views)
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Re: USB DVB-S [In reply to]

Nick
> Personally I wouldn't recommend to anyone to take the analogue signal and encode it back to digital when the digital signal is
> unencrypted and freely available.

Couldn't agree more, just there did not seem a lot of better options and it would work if your friend was desperate enough!

> > I guess you know about DiSEqC1.0/1.2 protocol and satellite dishes?
>

>I don't know anything specific, if you are hinting at some known problem, let us know :)

No hints intended above the usual concerns of how much will it take to work, rather it seemed you were not too sure about how the
magical sat dishes found where to look....

I do not know for sure but understand this is part of the trickery behind auto dish positioning: http://en.wikipedia.org/wiki/DiSEqC
and the box I suggested had some of that in it, not sure about versions of it etc...

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