[TriLUG] A Myth TV question, I think

OlsonE at aosa.army.mil OlsonE at aosa.army.mil
Fri Nov 7 11:52:15 EST 2008


....how is the change from Analog to Digital Television going to affect
MythTV in Feb?

-----Original Message-----
From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On
Behalf Of David A. Cafaro
Sent: Friday, November 07, 2008 10:26 AM
To: Triangle Linux Users Group General Discussion
Subject: Re: [TriLUG] A Myth TV question, I think

I've done some recording in HD on my MythTV box.  Found it works fine  
for all unencrypted QAM channels except ABC (which has sound issues,  
no idea why it's just them).  At most I've recorded two streams at  
once (I have a SiliconDust homerun network tuner with two tuners built  
in).  This is connected to the same GigE switch that my mythbox with a  
GigE network port is connected, though the homerun is only 100bT.  The  
recordings were done to a pair of 400GB SATA drives in Soft Raid 1  
configuration.

For storage I have just upgraded to a 1.4TB Raid 5 NAS box with 4  
500GB SATA drives.  I have not yet tried HD recordings to this, just  
analog.  I get a stable 5.3MB/s write speed over the network to the  
NAS box, which should be adequate for HD recording (at least for one  
stream, two may be pushing it tight).  Read from the NAS box is 21MB/s  
so recording a show and viewing a show should not be an issue.  I'd  
get better performance if my MythTV box GigE port supported Jumbo  
frames (which both the NAS and the Switch support), but I've recently  
learned that's not possible for the built in ethernet port.  The NAS  
box is mounted via NFS, and I've tried some tuning on the client mount  
point to improve performance.  The lack of jumbo frames is really  
hurting me there though.

HD content eats up a lot of disk space fast as it's already compressed  
and can easily top 9GB for a one hour show.  I still need to figure  
out the best recording quality setting for my analog content.  Right  
now a 30 minute show is being recorded to a 1.2GB file.  Though the  
quality is great, there has got to be a better combination of settings  
to reduce that file size.  No options to reduce HD content though,  
it's already compressed.

Cheers,
David


On Nov 7, 2008, at 8:46 AM, <OlsonE at aosa.army.mil>  
<OlsonE at aosa.army.mil> wrote:

> On that note, is anyone using MythTV to record HD content? How many
> streams are you able to record simultaneously? How much disk space do
> you have for the system?
>
> As of late, I've been having tons of issues with my TW cable box.
>
>
> -----Original Message-----
> From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On
> Behalf Of Greg Brown
> Sent: Thursday, November 06, 2008 6:49 PM
> To: Triangle Linux Users Group General Discussion
> Subject: Re: [TriLUG] A Myth TV question, I think
>
> They'd all be non-HD.  I think this is the solution I'm looking for.
> Now..
> to build..  and spend!!
>
> Greg
>
> On Thu, Nov 6, 2008 at 6:35 PM, Neil L. Little
> <nllittle at embarqmail.com>wrote:
>
>> You could also transcode them to a codec that produces smaller files
> (VLC).
>>
>> 73,
>> Neil, WA4AZL
>> JARS Forever!!
>> www.jars.net
>>
>> Brian Phelps wrote:
>>> HD or non HD?  See
> http://www.mythtv.org/wiki/index.php/Hauppauge_HD-PVR
>>> Read the fine print, H.264 720p is huge and tough to play back, even
>>> for a decent machine.  Try downloading the test clip.
>>>
>>> Non HD, there are cable capture-cards by hauppage.  I set one up
> once.
>>> It was pretty easy.  I only used it for a week or so.  The places
> you
>>> get the tables from for programming can be a pain, maybe someone
> else
>>> could elaborate who has more experience with this.
>>>
>>> No cable card, you gotta set up your MythTV to change the channel on
>>> the remote cable box via IR right?  I've never done that.  Sounds
> like
>>> a pain, but I don't know.
>>>
>>> The captured files are just movie files.  You could always copy them
>>> over using rsync etc.
>>>
>>> On Thu, Nov 6, 2008 at 12:10 PM, Greg Brown <gwbrown1 at gmail.com>
> wrote:
>>>
>>>> Peeps:
>>>>
>>>> I have cable at home and I'd like very much to record a lot of
> shows and
>>>> take those shows with me while on vacation, even for my
> (thankfully)
>>>> frequent weekend getaways.  What's the best way to do this?  Have
> two
>> Myth
>>>> TV servers, one at each location and record to a big old honkin' 2
> TB
>> disk
>>>> pack?  I'd prefer not to take an entire computer with me if at all
>> possible.
>>>>
>>>> How easy is this to set up and get running?  I suspect the home
> server
>> would
>>>> connect to the cable system that we have with Time Warner.  At the
> beach
>>>> we're soon not going to have a cable provider.  I should be able to
>> output
>>>> via RCA or HDMI, right?
>>>>
>>>> Greg
>>>> --
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>>>
>>>
>>>
>>>
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