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<div class="moz-cite-prefix">On 01/10/2015 07:00 AM, Raymond
Boettcher wrote:<br>
</div>
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<div id="yui_3_16_0_1_1420877628798_5652"
class="y_msg_container">Hoi Chris,<br clear="none">
<br clear="none">
Thursday, January 1, 2015, 1:11:36 AM, you wrote:<br
clear="none">
<br clear="none">
> Thanks to all who replied. I think I've nailed it.
I have a<br clear="none">
> switch between my mythtv box and my HD Homerun that
is negotiating a<br clear="none">
> 100MB connection instead of a gigabit connection.
That switch has<br clear="none">
> the HDHR, 5 surveillance cams, an xbox and several
other machines<br clear="none">
> running through it. Looks like I have a physical
cable problem<br clear="none">
> somewhere. When I disconnect everything except the
HDHR, my<br clear="none">
> recordings and LiveTV clear up because there's not
much network activity.<br clear="none">
<br clear="none">
<br clear="none">
> On Wed, Dec 31, 2014 at 3:50 PM, Jay Foster <<a
moz-do-not-send="true" shape="rect"
ymailto="mailto:jayf0ster@roadrunner.com"
href="mailto:jayf0ster@roadrunner.com">jayf0ster@roadrunner.com</a>>
wrote:<br clear="none">
<br clear="none">
> On 12/31/2014 1:43 PM, E James wrote:<br clear="none">
> <br clear="none">
> On 31/12/2014 02:20, Chris Gentle wrote:<br
clear="none">
> <br clear="none">
> Within the last couple of weeks, my Live TV has
started breaking<br clear="none">
> up and distorting really bad. I'm not sure exactly
when it started<br clear="none">
> but it has become unwatchable. I do over-the-air
only and have<br clear="none">
> really good signal strength (90+) coming into my HD
Homerun. I<br clear="none">
> bypassed the HD Homerun and hooked a TV straight to
the antenna to<br clear="none">
> verify that the signal is good. No artifacts in the
picture at all. <br clear="none">
> Also switched out the HD Homerun with a spare one but
that didn't make any difference either.<br clear="none">
> There have been no hardware changes in my myth
system in months.<br clear="none">
> <br clear="none">
> I did a completely fresh installation of Mythbuntu
14.04.1 today<br clear="none">
> just to see if that would make a difference but it
did not. The<br clear="none">
> problem persists even after a reinstall. I recorded
a show, copied<br clear="none">
> the recording to another machine and played back with
mplayer. The<br clear="none">
> recording itself is bad. The artifacts show up in
the recorded file<br clear="none">
> so I think I've narrowed the problem to the recording
phase rather than playback.<br clear="none">
> <br clear="none">
> I'm not sure what to look at next. Any
suggestions? Any new known problems with Live TV?<br
clear="none">
> <br clear="none">
> Version Info:<br clear="none">
> <br clear="none">
> MythTV v0.27.4-27-g40506c3<br clear="none">
> Mythbuntu 14.04.1<br clear="none">
> nVidia GeForce 210<br clear="none">
> nVidia driver 331.113-0ubuntu0.0.4<br clear="none">
> <br clear="none">
> Thanks.<br clear="none">
> <br clear="none">
> -- <br clear="none">
> Chris<br clear="none">
> <br clear="none">
> <br clear="none">
> _______________________________________________<br
clear="none">
<br clear="none">
<br clear="none">
<br clear="none">
<br clear="none">
> First, try always to post at the bottom of the list!
:)<br clear="none">
<br clear="none">
> Next, if you have a free pci-e slot in your machine,
I suggest getting<br clear="none">
> a simple network-card and lay in a dedicated line
between the homerun<br clear="none">
> and the backend. That way you prevent these kind of
disturbance!<br clear="none">
<br clear="none">
> Tot mails,<br clear="none">
> Hika mailto:<a
moz-do-not-send="true"
id="yui_3_16_0_1_1420877628798_6258" shape="rect"
ymailto="mailto:hikavdh@gmail.com"
href="mailto:hikavdh@gmail.com">hikavdh@gmail.com</a><br
clear="none">
<br clear="none">
<div id="yui_3_16_0_1_1420877628798_5844" dir="ltr"><br>
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<div id="yui_3_16_0_1_1420877628798_5845" dir="ltr">Hey
Chris,<br>
</div>
<div id="yui_3_16_0_1_1420877628798_7628" dir="ltr"><br>
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<div id="yui_3_16_0_1_1420877628798_5846" dir="ltr">His
solution of course is the best and most guaranteed way
to ensure that doesn't happen again. Also, depending on
the Network Controller, you may have to use a cross-over
cable to directly attach the HDHomerun to the second
network card (or have another network switch handy) in
your mythbackend and run on a seperate subnet and DHCP
Server for that network card so the HDHomerun can obtain
an address and use the second link (You will have to
reconfigure MythTV for the new IP Address of the
HDHomeRun). You could bridge the 2 network cards
together using brctl but that gets a little more complex
but maybe easier than configuring a separate subnet and
DHCP Server just to link up the HDHomeRun and still
offers the benefits of a dedicated connection between
the HDHomeRun and the Mythbackend while allowing you to
use your existing network, DHCP Server and all... Many
people aren't running their own dedicated DHCP Server
and often use the DHCP Server on their hardware router.
They enter MythTV-setup and select the Network Tuner and
MythTV detects and does the rest.<br>
</div>
<div id="yui_3_16_0_1_1420877628798_5847" dir="ltr"><br>
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<div id="yui_3_16_0_1_1420877628798_5848" dir="ltr">I had
the same problem and it was due to a bottleneck in my
network as well. My HDHomerun links at 100mb, but in my
instance I swapped the 100mb switch for a gigabit
switch. Made sure the backend server is connected to
that switch and it is linked at gigabit! (dmesg will say
or the light on the network controller or switch will be
Amber instead of Green or visa versa) Some on-board
controllers support gigabit, some don't. I have a
dedicated Intel PCI-E Gigabit Controller and it does the
trick without issues. Also, make sure the HDHomerun is
connected directly to that switch and not 1-2 switches
down the line causing some other bottleneck. That is
the alternative solution. In theory that gigabit
connection should handle the full bandwidth of 10 x
100mb links to that switch all talking to the
mythbackend at the same time. Unlike hubs, switches
will convert the signaling from 100mb to gigabit while
it's passing through the switch. That doesn't mean you
will get more bandwidth from the 100mb link as it does
just the opposite going from the gigabit to the 100mb
link. But it will ensure that you have as much bandwith
as possible between the switch and your server for the
camera links, HDHomeRun, etc. <br>
</div>
<div id="yui_3_16_0_1_1420877628798_6755" dir="ltr"><br>
</div>
<div id="yui_3_16_0_1_1420877628798_6768" dir="ltr">Make
sure your hard drive is not the bottleneck... If the
drive light is lit solid, this is likely the issue. If
you are recording those camera's onto the same hard
drive as your DVR Recordings, the drive may not keep
up. This will create a lot of seek time and
fragmentation between the recording(s) being saved and
the 5 camera's recording to separate files on the same
disk. It is VERY wise to give MythTV it's own drive,
separate of the OS, or any Camera Feed recording you may
be tossing at that machine. The drive will likely get
very hot and fail much quicker if you run the setup all
on 1 drive. Especially if you are pulling a full 30fps
from each camera. If they are security camera's, dial
them down to 2-3 Frames per second. This will greatly
conserve network bandwidth, disk space and possible
drive failure.<br>
</div>
<div id="yui_3_16_0_1_1420877628798_7157" dir="ltr"><br>
</div>
<div id="yui_3_16_0_1_1420877628798_7176" dir="ltr">Even
if they are being recorded on another machine... Dial
down the frame rate anyway mainly because of the network
bandwidth being used. Or connect that Camera Recorder
machine and cameras to a separate network switch. You
can still connect the switches together, but it will
keep camera bandwidth and recording limited to 1 switch
while the other switch handles DVR Recording
(MythBackend), Frontend Access and HDHomeRun access...
Make sure both switches are gigabit and that they link
to each other at gigabit speed. Technically 1 big
switch (16 port, etc) can handle it, but this makes your
layout easier to understand... Generally two 8 port
gigabit switches is cheaper than a 16 port gigabit
switch, however the 16 port switch does give dedicated
bandwidth to each port without bottle necking the link
between the two 8 port switches.<br>
</div>
<div id="yui_3_16_0_1_1420877628798_6838" dir="ltr"><br>
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<div id="yui_3_16_0_1_1420877628798_6839" dir="ltr">CPU
bottleneck could also be an issue if the program used to
record the camera feeds is transcoding the feed live
before saving it to disk. Many IP Camera's send out
MJPEG Frames and it's often wise for the program to
convert that to a "more space saving" format. If you
are using ZoneMinder, it tends to create millions of
JPEG files on the disk which also creates a lot of
activity for your hard disk... I highly recommend using
a separate machine for handling the Camera Feeds,
especially if they are HD IP Camera's. It can be done
on 1 machine cause I've done it, but careful planning
over computer specs, program settings (MythTV and the IP
Camera Recorder), network bandwidth, etc must be taking
into account...<br>
</div>
<div id="yui_3_16_0_1_1420877628798_6741" dir="ltr"><br>
</div>
<div id="yui_3_16_0_1_1420877628798_6803" dir="ltr">This
option is a little more economical if you don't have
spare ethernet controllers laying around and/or your not
versed on how to configure a "small network" while using
MythBuntu Linux as the "Host" (IE: DHCP Server and
perhaps Gateway if needed) of that "small network."
MythBuntu is pretty stripped down, and will require
installation of some packages to make everything happy.
And if you use Windows as your mythbackend host, that
makes matters twice as complicated.<br>
</div>
<div id="yui_3_16_0_1_1420877628798_6142" dir="ltr"><br>
</div>
<div id="yui_3_16_0_1_1420877628798_6143" dir="ltr">Anyhow,
keep that in mind. This community is extremely versed
on hardware configuration, linux/windows administration,
programming, etc. It's REALLY easy to say things like
"setup another network card" but it's easily missed that
the person may not know how to or what is involved in
doing so. And as you can see from above, that may not
be the problem. But he is right, it is the most likely
problem. You may know all of this already but I wanted
to point out what is involved anyway because some people
don't know and it's easy in a Tech Forum to speak "Tech"
without first finding out the skill levels of the person
that the question is being answered for. MythBuntu is
generally the version people install that want to "get
their feet wet" with MythTV, but don't really want to
jump into the deep end and figure out if they can swim
or not (Compiling code, Customizing MythTV, etc). Linux
is hard to learn, trust me, been there, done that...
Started with RedHat and ended with Slackware. I hope
this helps...</div>
<div id="yui_3_16_0_1_1420877628798_6586" dir="ltr"><br>
</div>
<div id="yui_3_16_0_1_1420877628798_6644" dir="ltr">-RayRay-</div>
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<br>
<br>
I love the solution of a second NIC card with HDHomeRun Prime on a
dedicated Mythbuntu server with a static using a router for DHCP on
the network but can't find any info on what the
/etc/network/interfaces should look like with the additional card.<br>
<br>
Currently it should look like this:<br>
<br>
<pre>auto lo eth0
iface lo inet loopback
iface eth0 inet static
address xxx.xxx.xxx.xxx(enter your ip here)
netmask xxx.xxx.xxx.xxx
gateway xxx.xxx.xxx.xxx(enter gateway ip here,usually the address of the router)
What would it look like with a second card with the HDHomeRun pluged into it?
Not trying to steal the thread but I think the answer will help a lot of people
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