[mythtv-users] How hard is it to build an HD MythTV?
Steven Adeff
adeffs.mythtv at gmail.com
Tue Apr 1 15:08:45 UTC 2008
On Sat, Mar 29, 2008 at 1:46 PM, Tom Dexter <digitalaudiorock at gmail.com> wrote:
> On Fri, Mar 28, 2008 at 4:44 PM, Brad DerManouelian
> <myth at dermanouelian.com> wrote:
> >
> > Commflagging is fast. You don't need a beefy CPU to do this in any sort
> > of reasonable amount of time.
> >
>
> A question about this...
>
> So far I haven't been bothering with commercial skipping at all. I
> record almost entirely HD OTA (USA).
>
> My backend is a p4 2.8 Ghz. Right now I'm running mythcommflag from a
> command prompt on a one hour 1080i show using all methods. It's
> progressing at about 27 fps (so it'll take a bit longer than watching
> the show in real time) and using most of the CPU. Does that sound
> like what I should expect? Given the cpu needed just for decoding I
> assumed that performance made sense.
that sounds about right, my backend is a Athlon64 3200+, I run two
mythcommflag sessions at a time and they do about 20fps each. When I
had the machine as my combined FE/BE, it used about 80% CPU average
while recording and during playback, so 27fps on your P4 sounds right.
> Does the method affect the speed much? I've read that logo detection
> can work pretty well with OTA HD. I'm assuming the bulk of the work
> with HD is simply mpeg decoding and that the method may not have much
> impact.
yes, it will, specifically I don't know, and to be honest I think your
right, I don't think it will affect it that much either.
--
Steve
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