[mythtv-users] Playback performance [all platforms]

[David Abrahams]

Greg Estabrooks <greg at phaze.org> writes:

>> AFAICT, there's no processor-specific optimization in playback at all.
>> So if performance is bad on PPC/Darwin, it's probably bad (compared to
>> what's possible) on x86/Linux as well.
>
>  The differences is that scalling/display through XV is hardware 
> accelerated whereas on the PPC it's using  Quicktimes ScaleMatrix which
> is done in software. According to a Apple Tech I spoke with the other day 
> that with the right combo of OSX versions and hardware it will be done
> in hardware but I didn't get any specifics on what the right combos
> are.
>
>> Ouch, really?  Not good news for the MacOS folks.  I wonder what about
>> the MacOS frontend is sucking so badly?  I am running a
>
>  I'd bet money that a large portion of it is the scaling of the video.
> If someone with a MAC wants to do research I'm sure a proper solution
> could be found, if only so that other MAC frontend users will have
> the info when making hardware purchases
>
>> > So I' can't vouch for possible x86 optimization, but I'm pretty sure
>> > the code could be tweaked to run faster on Darwin/PPC.
>> 
>> Can you explain why you are pretty sure of that?
>
>  There is definately better ways to take advantage of the hardware which
> isn't being done on the MAC.
>
>  If someone wants to send me one I'd volunteer to work on it :)

I'd be happy to; I have one that's presently gathering dust.  What's
your address (offline, if you prefer)?  The more muscle we can put
behind Mac development, the better, as far as I'm concerned.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com