[mythtv-users] Mac OS X video profile settings in 0.21?
Todd Ignasiak
todd.ignasiak at gmail.com
Fri Mar 14 19:50:55 UTC 2008
On Fri, Mar 14, 2008 at 1:15 AM, Monkey Pet <monkeypet at gmail.com> wrote:
> I think the difference between your setup and mine is that I am trying
> to playback 1080i shows on a 1080 resolution 1920x1080, while you are
> using a 720p resolution.
There was a change made in 0.21 to help the 1080p scaling issues. I
tested it on a 1920x1200 iMac, and it solved the issue there.
Unfortunately it appears it didn't solve the issue across the board.
If you turn off the "Scale as necessary" option in playback settings,
does it help your 1080i playback? If so, the root source is probably
the same as what we were seeing before.
> On Fri, Mar 14, 2008 at 1:06 AM, Todd Ignasiak <todd.ignasiak at gmail.com> wrote:
> > On Thu, Mar 13, 2008 at 11:25 PM, Monkey Pet <monkeypet at gmail.com> wrote:
> > > Todd provided his binary for me to test. Unfortunately, on my intel
> > > macmini (1.83GHz Intel Core 2 Duo, 1GB of memory), i didn't see it
> > > make any difference on the 1080i playback and still had choppy
> > > playback (as observed from watching the video playback). However,
> > > Todd mentioned something about the 1080i playback not working right in
> > > his post.
> >
> > For me, 1080i works fine with software decoding. I only ran into
> > problems when trying to do 1080i with the hardware accelerated video
> > playback.
> >
> > What video profile settings are you using? I use a custom profile, set to:
> >
> > Resolution > 720p: Standard Decoder and Quartz-blit renderer and
> > Linear Blend deinterlacer.
> > 720p: "Mac hardware acceleration" Decoder and quartz-accel renderer
> > Res < 720p: Standard Decoder + Quartz-blit renderer + Linear Blend.
> >
> >
> > I am running on a 1.66GHz Core Duo Mini with 1GB RAM, displaying on a
> > 1280x768 DLP Projector connected via DVI->HDMI.
> >
> >
> >
> > > Temporary hosted here: http://yoeu.net/~fa/mfe_0.21mmx.zip
> > >
> > >
> > > On Thu, Mar 13, 2008 at 10:35 AM, Monkey Pet <monkeypet at gmail.com> wrote:
> > >
> > >
> > > > Hi Todd, can you provide a binary for us to test? I want to see if
> > > > this patch solves the issue for me. Thx.
> > > >
> > > >
> > > > On 3/13/08, Todd Ignasiak <todd.ignasiak at gmail.com> wrote:
> > > > > On Sun, Mar 9, 2008 at 1:37 PM, Todd Ignasiak <todd.ignasiak at gmail.com> wrote:
> > > > > > I just upgraded my Mac OS X MythTV setup to 0.21, and ran into
> > > > > > problems with video playback performance.
> > > > > >
> > > > > > 1080i playback went from using 80-90% of one CPU (Mac Mini 1.66GHz
> > > > > > Core Duo) in 0.20.2 to 135-155% CPU with 0.21 and choppy playback.
> > > > > > I have tried a bunch of settings for the video profile, but nothing
> > > > > > has brought the CPU down from the 150% range. Even 720p playback,
> > > > > > which used to be around 65-70% cpu load, is at 130%+.
> > > > >
> > > > >
> > > > > After a bunch of experimentation, I finally located a Trac ticket
> > > > > which had a patch to enable MMX in Leopard. After applying that
> > > > > patch, video decoding CPU usage is back down in the ballpark that 0.20
> > > > > was in. Are these 'known issues' posted anywhere? It is not
> > > > > mentioned in the release notes, or any mailing list, wiki, etc. that I
> > > > > could find.
> > > > >
> > > > > The patch is here: http://svn.mythtv.org/trac/ticket/4200
> > > > >
> > > > > I also enabled the Mac video acceleration (dvdv) option. For 720p
> > > > > playback, it looked very promising.. CPU usage was around 50%. But,
> > > > > 1080i playback didn't work right, the video output was corrupted with
> > > > > tiles of what appeared to be unused video memory (e.g. chunks of the
> > > > > Front Row menu were shown when video playback was attempted).
> > > > >
> > > > >
> > > > >
> > > > > > I see that the dvdv acceleration is listed as a new feature in 0.21.
> > > > > > Does this mean that it is now stable enough for common usage? My
> > > > > > attempts at using it in the past didn't go well. Are there any
> > > > > > limits on its support (is Leopard okay?), or is it documented
> > > > > > anywhere? I am not positive, but I don't think the frontend
> > > > > > configuration generated by osx-packager.pl listed Mac acceleration as
> > > > > > being enabled.
> > > > > >
> > > > > >
> > > > > > The settings options appear to be:
> > > > > >
> > > > > > Decoder: Standard, libmpeg2,
> > > > > > Video Renderer: opengl, quartz-blit
> > > > > > OSD Renderer: softblend
> > > > > >
> > > > > > Decoder: Mac hardware acceleration
> > > > > > Video Renderer: quartz-accel
> > > > > > OSD Renderer: opengl3
> > > > > >
> > > > > > I thought the closest approximation of 0.20 settings was Standard
> > > > > > MPEG2, Quartz-blit, softblend. But, that was still up around 150%
> > > > > > CPU.
> > > > > >
> > > > > >
> > > > > > Anyone having better results for Mac OS playback?
> > > > > >
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> > > > >
> > > >
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