[mythtv-users] best method to performance tune?

Risto Treksler risto at elkhornbanff.ca
Thu Feb 6 21:30:28 UTC 2003


right
that info is easy to get 

what is needed is a database of sorts that would let myth tv say
most ppl with 512MB of ram with 1500 bogomips of processing power ;)
a g200 card and 1 bt based tuner
went with ??? settings.

so myth tv could automatically give itself some "optimal" settings

this way you can make an rpm 


On February 6, 2003 02:03 pm, Micah Morton wrote:
> 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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