[mythtv-users] Playback Profiles? WTF?!

[Glen Hawksworth]

I have tried every possible combination of the ffmpeg settings and I get
stuttering with all of them; best result is one stutter every 3-4
seconds.
I did some searching about DMA and I believe my box is using UDMA. It is
running off a CF card (/dev/sda) at ATA133.
I am baffled as to how HD is watchable with a 2GHz in MythTV 0.21
I am going to spend some of easter trying the 256MB nVidia to see if it
makes a difference and then try reloading the frontend from scratch.

On Thu, 2008-03-20 at 14:09 +1100, glenhawk at optusnet.com.au wrote:
> Hmmm... you have a 2GHz machine that runs HD video... and you are not using XvMC.
> Using ffmpeg you are putting the load on the CPU rather than the VGA card, is that right?
> If that is the case then that should be fine for my machine that is only running a 64MB nVidia.
> I have disabled the OSD fade but my problems have been that I get stutter simply when the OSD in on screen.
> I am interested in your DMA issue. Where would I find out what mine is set to?
> I shall have to experiment further with ffmpeg I think, I only persevered with XvMC becasue it was the first setting I found that allowed stutter free HDTV.
> Thanks again for your help,
> Glen
> 
> 
> > Raphael <rpooser at gmail.com> wrote:
> > 
> Glen Hawksworth wrote:
> > Thanks Raphael,
> > Unfortunately my post turned into a RANT fest. Probably my fault
> > choosing the subject name.
> > I am just going to have to sit down and struggle with the settings till
> > I get something like the performance from 0.20
> > cheers,
> > Glen
> > 
> 
> No worries. I would say that with a 3 GHz machine you should get pretty 
> good results - I have 2GHz myself. I'm using fairly simple settings, and 
> I don't use XVMC since I don't like the gray OSD.
> 
> I have it set to use ffmpeg in all cases for any resolution. I also have 
> only two resolution rules defined, one for everything less than or equal 
> to 1280x720, and one for everything greater or equal to 1920x1080.
> The second case only adds deinterlacing. Maybe you should try using "one 
> field" deinterlacing, as I think it's supposed to be one of the more 
> easy on the computing power ones. Linear blend is also not too 
> computationally intensive I think. I used to use kernel, but actually 
> like the way linear looks on my display better.
> 
> You can also try disabling OSD fade, and use the least expensive OSD 
> blender. I use softblend - not sure which is less intensive or if that 
> one is itself.
> 
> Also, for no apparent reason, I came home one day to find DMA had turned 
> itself off on my drives. I was getting stuttering while watching HD 
> until I found that problem. I still don't know how it happened.
> 
> Cheers,
> Raphael
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