<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 22, 2024 at 9:31 AM Stephen Worthington <<a href="mailto:stephen_agent@jsw.gen.nz">stephen_agent@jsw.gen.nz</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Wed, 22 May 2024 13:55:30 +0100, you wrote:<br>
<br>
>On 20/05/2024 16:35, Paul Gardiner wrote:<br>
>> On 20/05/2024 15:47, Klaas de Waal wrote:<br>
>>> Hi Paul,<br>
>>><br>
>>> SatIP has been supported in Mythtv already for a long time via IPTV <br>
>>> with M3U playlists, as you mentioned, but since V32 it is also <br>
>>> natively supported. This means you can do the channel scanning etc as <br>
>>> if it is a /dev/dvb/*/* tuner and also EIT does work, if present in <br>
>>> the signal. Note that EIT does not work with IPTV.<br>
>>> See the Wiki page <a href="https://www.mythtv.org/wiki/Channel_Scanning" rel="noreferrer" target="_blank">https://www.mythtv.org/wiki/Channel_Scanning</a> <br>
>>> <<a href="https://www.mythtv.org/wiki/Channel_Scanning" rel="noreferrer" target="_blank">https://www.mythtv.org/wiki/Channel_Scanning</a>> and specially paragraph <br>
>>> <a href="https://www.mythtv.org/wiki/Channel_Scanning#Scanning_with_Sat.3EIP_tuners" rel="noreferrer" target="_blank">https://www.mythtv.org/wiki/Channel_Scanning#Scanning_with_Sat.3EIP_tuners</a> <<a href="https://www.mythtv.org/wiki/Channel_Scanning#Scanning_with_Sat.3EIP_tuners" rel="noreferrer" target="_blank">https://www.mythtv.org/wiki/Channel_Scanning#Scanning_with_Sat.3EIP_tuners</a>><br>
>>><br>
>>> Hope this helps,<br>
>>> Klaas.<br>
>> <br>
>> Thanks Klaas. That information has saved me a load of unnecessary work - <br>
>> creating an M3U file I don't need. And the native support makes the use <br>
>> of minisatip a vastly more attractive solution to my problems.<br>
><br>
>Ultimately proved to be a failure. Setting up minisatip proved easy <br>
>enough, and the MythTV integration is simple to use, but the stream <br>
>corruption was still apparent. It seems my server is no better at <br>
>servicing the tuners under the VM Host than under a VM. While using <br>
>minisatip, I was seeing some drop out both from the USB-based DVB-T2 <br>
>tuner and from the PCI-based DVB-S2 one. Going back to PCI pass-through, <br>
>I also now see it on both. I guess I noticed it only from one before <br>
>because of it's intermittent nature. I'm wondering now if my server just <br>
>isn't fast enough to handle servicing of the tuners in a KVM context: <br>
>although this server is faster than either of the ones I previously <br>
>used, it's still 10 year old hardware - a Z77 based motherboard and an <br>
>i7-3770S.<br>
><br>
>So, the tuners are back in one of my old servers now and reception looks <br>
>to be back to being flawless. An experiment I've only just thought of is <br>
>to try using the old server as a minisatip server with new one running <br>
>mythbackend. I wouldn't want to stick with that set up but, if it works, <br>
>perhaps I can find something small and innocuous to house my tuners and <br>
>run minisatip (although that's one more thing to administer - not the <br>
>direction I was wishing to go). That set up working would also be more <br>
>evidence that a Homerun would work, although using a Homerun means <br>
>losing my DVB-S2 feed.<br>
><br>
>Paul.<br>
<br>
When I first started using minsatip, I was running it and MythTV on a<br>
2012 Asus M5A97 EVO motherboard with an AMD FX-4100 processor and it<br>
worked fine. It is only about 13 months ago I upgraded to a modern<br>
system. Minisatip itself has very low resource usage - it was<br>
designed to be able to be used in embedded systems.<br>
<br>
One thing to try would be having the tuners on the new server and the<br>
MythTV VM running on a different box. If there are no problems with<br>
that, then it is likely a problem with the scheduling of the VM.<br>
Mythbackend only has small buffers for receiving tuner data and<br>
storing it before it gets to disk. When there are problems with<br>
reception, the data is often being lost there, rather than between the<br>
tuners and mythbackend. If the VM scheduling is such that there is<br>
too much delay in getting the data written to disk, that would explain<br>
what you are seeing.<br>
<br>
When you are getting this data loss, does it happen if you are only<br>
recording from one tuner? Or does it require multiple tuners in use<br>
before it happens? If the latter, how many hard drives are you using<br>
on the new system to record to, compared with the old system? Maybe<br>
the disk heads are thrashing?<br>
<br>
Other people have reported using mythbackend successfully inside a VM<br>
using VirtualBox and VMware, so it could be a problem with the VM<br>
software you are using, or its setup.<br>
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MythTV Forums: <a href="https://forum.mythtv.org" rel="noreferrer" target="_blank">https://forum.mythtv.org</a></blockquote><div><br></div><div>I've been using mythtv backend as a KVM vm for probably 10+ years, although I have HDhomerun network tuners. I have had no issues running it that way. </div></div></div>