<br><div class="gmail_extra"><br><br><div class="gmail_quote">On Sat, Nov 3, 2012 at 8:18 PM, Nick Rout <span dir="ltr"><<a href="mailto:nick.rout@gmail.com" target="_blank">nick.rout@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div class="h5">On Sat, Nov 3, 2012 at 8:08 PM, Lee Maisel <span dir="ltr"><<a href="mailto:maisel@lobo.net" target="_blank">maisel@lobo.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Nick Rout wrote:<div><div><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
<br>
<br>
On Sat, Nov 3, 2012 at 7:28 PM, Lee Maisel <<a href="mailto:maisel@lobo.net" target="_blank">maisel@lobo.net</a> <mailto:<a href="mailto:maisel@lobo.net" target="_blank">maisel@lobo.net</a>>> wrote:<br>
<br>
I'm trying to get some performance gains. Currently, there are<br>
some artifacts/sound pauses (annoying) Not surprising when<br>
multiple recordings are going, and they are typically 8GB in size.<br>
I read in the optimization wiki a mention of reducing the<br>
recording sizes, but there was no instruction as how to do so!<br>
<br>
I assume that by doing this, I would:<br>
<br>
reduce disk usage<br>
decrease network traffic<br>
reduce CPU processing<br>
<br>
Setup is as follows:<br>
<br>
Mythbuntu Mythtv 0.25 Fe/Be<br>
4GB ram<br>
3TB separate disk for recordings (USB unfortunately, but that's<br>
another story, bios won't see correct drive size if installed as SATA)<br>
3 HD Homerun tuners (giving me 6 inputs)<br>
Nvidia HDMI output for video and audio<br>
<br>
I have looked and looked at the settings, and cannot for the life<br>
of me find out where in the heck to change the recording<br>
resolution/bitrate etc.<br>
<br>
<br>
You can't. You have a digital tuner (albeit joined to your backend via a network) and it records what the TV company sends.<br>
<br>
<br>
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I Suspected as much. Well that's a bummer. Any ideas on what to do about the annoying audio issue? It's not all the time, but when it happens, it's so irritating, nobody wants to continue the program. It like blanks out (audio) every few seconds for a blip.<br>
I'm really really hoping it's a reception issue, which i'll remedy soon with dual antennas.<div><div><br></div></div></blockquote></div></div><div><br>Could be a number of things, most likely one of the following is breaking the stream:<br>
<br>*reception errors (check all cabling, signal levels, there are hdhr utilities for measuring stuff like this)<br><br>*network bandwidth if you have a dodgy connection between the HDHRs and your backend, but it would take a few simultaneous streams to max out a 100M network. (put HDHR on a separate network and separate video card, chack all networking hardware including cables)<br>
</div></div></div></blockquote><div><br>I mean separate NETWORK card.<br> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_extra"><div class="gmail_quote">
<div>
<br>*disk IO when recording multiple streams, perhaps coupled with disk IO required for the database writes associated with recording a number of streams. (make sure mysql is on a separate disk to your recordings storage groups, get mysql performance optimised (there is a mythtv wiki page) make sure all disks are OK, defrag, blah blah)<br>
<br>I have probably missed some things. <br> </div><div class="im"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>
Lee<br>
<br>
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