[mythtv-users] best method to performance tune?

Micah Morton micah at oregontech.net
Thu Feb 6 21:03:47 UTC 2003


Isn't most of that information in /proc?  I know CPU Speed, Ram and free
space are all in proc.. along with pci specs, possibly mpeg decoder
stuff.. but not sure...

--Micah Morton
--Linux Network Test Engineer
--Intel Corp

> this info could be used to auto-tune myth-tv settings
>
> i mean mythtv could look at
> cpu speed
> amount of ram
> hardware mjpeg acceleration
> free disk space on the system
> etc.
> and auto tune itself
> if it had access to this info
>
> all the user would have to do is fine tune
>
> On February 6, 2003 10:35 am, Jeff_Mitchell at accessbusinessgroup.com
> wrote:
>> Brian-
>>
>> Well, you can probably get in the ballpark by looking at what other
>> people are using for hardware and compression settings.  I had some
>> posts yesterday talking about my setup (a search on the myth-dev
>> archive for the strings 'Mitchell' and 'PIII' should get you on the
>> right thread.  Even if my hardware is vastly different than yours, you
>> should be able to ballpark what your box can handle.
>>
>> For the tweaking after you're in the ballpark, I'd start by deciding
>> which compression method you want to use.  I believe MPEG4 takes more
>> grunt, but gives you a larger file size, while rtjpeg is vice-versa
>> (with
>> middle-of-the-road quality settings -- I'm sure you could switch this
>> around by screwing around with settings.)  Then look at resolution,
>> and finally the compression settings.
>>
>> Before starting this, you should brobably psyche yourself up for a
>> (possibly) lengthy, iterative process.  Because "quality" is such a
>> subjective, nebulous term, you're not going to find a straight answer
>> for video settings.  Just use Myth like you plan to use it, and play
>> around with settings until you find something that works for you.  I
>> played around with the seetings for a few days, and haven't touched
>> them since.  Perhaps I'll get the bug, but probably not any time soon.
>>  Obviously after a hardware upgrade, I expect to go through the same
>> rigamarole.
>>
>> During your journey, if you have any questions about how you might be
>> able to tweak something specific (like problems during panning, etc.),
>> you could probably get some good insight from this list.
>>
>> -Jeff
>>
>> P.S.  I should note that I had played around with settings for the
>> same card on a pretty much comparable machine under Windows XP before,
>> and I did that for probably 3-4 days, so I had a bit of a head start
>> when configuring the compression settings for Myth.
>>
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>
>
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