<br><br><div class="gmail_quote">On Fri, Sep 25, 2009 at 2:58 PM, Richard Shaw <span dir="ltr"><<a href="mailto:hobbes1069@gmail.com">hobbes1069@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="h5">On Fri, Sep 25, 2009 at 12:03 PM, James Orr <<a href="mailto:james.orr7@gmail.com">james.orr7@gmail.com</a>> wrote:<br>
> I have a master backend with 2 PVR-250s connected to it, and a slave backend<br>
> which records from an HD HomeRun.<br>
><br>
> Now that fall is here with the new TV shows, things are getting busy and<br>
> I've had a couple situations where I am recording 4 programs at once.<br>
><br>
> If I'm recording two HD programs only, everything is fine.<br>
><br>
> If I'm recording two HD programs plus one SD program, everything is fine.<br>
><br>
> If I'm recording two HD programs and two SD programs, the HD programs become<br>
> extremely glitchy with lots of artifacts and large green blocks and<br>
> stuttering, only barely watchable and occaisionally completely unwatchable.<br>
> This seems to start a few minutes after the programs started recording, the<br>
> first few minutes are fine.<br>
><br>
> For example on Monday, it recorded Heroes, House, How I Met Your Mother and<br>
> one other hour long show I forget which. A few minutes into both House and<br>
> Heroes the recordings became glitchy and this lasted half an hour, until How<br>
> I Met Your Mother ended.<br>
><br>
> I suspected it might be something to do with commercial flagging so I went<br>
> in to mythtv-setup and set it so that it will only flag recordings recorded<br>
> on the same backend, AND restricted the job queue to run only between<br>
> midnight and 7:00 PM (avoiding prime-time hours when I'm most likely to be<br>
> recording that many things), but this didn't help at all.<br>
><br>
> What I don't really understand is why having the master backend record<br>
> something affects how the slave backend is doing it's recording if there's<br>
> no jobs running at the same time (i.e. the slave backend comm flagging<br>
> something on the master or vice versa).<br>
><br>
> Also, I have my storage folders setup so that both backends only record to<br>
> local drives.<br>
><br>
> Fortunately most of the shows recorded on the PVRs are on the cable networks<br>
> and thus have many repeats so for now I can tell it not to record any<br>
> showing at the same time as two HD recordings but this isn't a good long<br>
> term solution and doesn't help much with the WAF either :).<br>
<br>
</div></div>This is purely a guess, but does your master backend also the mysql<br>
server? If so, is your database on the same physical drive as your<br>
recordings? The only reason I can think of this happening is that<br>
there is some lag in updating the index info in your database when<br>
<div class="im">recording 4 programs at once.<br>
<br>
</div>Does transcoding with index rebuilding help? e.g. "mythranscode<br>
--buildindex ..."[1]<br>
<br></blockquote><div><br>The master backend is also the mysql server, but the database is on a different physical drive from any recordings.<br><br>I've never tried that mythtranscode option before, actually I've never run mythtranscode from the command line before ... what exactly would I type for a given file? Just mythtranscode --buildindex somefile.mpg<br>
</div></div><br>