[mythtv-users] HDTV Patch Feedback

[John Patrick Poet]

Take a look here:

http://www.mrl.nyu.edu/~danielk/mythtv/


John
--

On Mon, 10 May 2004, Ben de Luca wrote:

> where do these patches come from?
>
>
>
> On 09/05/2004, at 9:24 AM, XKE GUY wrote:
>
> > I've applied some of Daniel's HDTV patches with very
> > good success.  I want to thank Daniel for providing
> > these patches, as they've allowed me make a useable
> > system.
> >
> > Here are the specifics of my system.
> > Athlon XP 2400, ECS K7VTA3 MB, 512MB RAM, 250GB HD,
> > Geforce4 VGA, pcHDTV, custom 2.4.21 kernel, chaintech
> > sound card w/ optical out.
> >
> > I've applied the following patches to the May 7th 4:00
> > PM PST CVS:  xvmc-playback-v2.patch,
> > hdtv-recorder-v6.patch, hdtv-signalcheck-v7.patch.
> >
> > Now hdtv recordings playback almost flawlessly.
> > During a one hour show I might have only 2 or 3 little
> > "glitches".  These glitches might have a small
> > checkerboard pattern for just half a second.  When I
> > skip ahead or back, the audio and video stutter until
> > the OSD has faded.  When the camera pans fast I
> > sometimes see wavy artifacts.  This seems to be more
> > apparent on 1080i material (CBS) than 720p material
> > (NBC).  I'm running about 35% cpu utilization.  This
> > is great, this is more than useable for me.
> >
> > When I tune to a digital channel that isnt showing
> > 16:9 HDTV material, I have audio glitches.  This would
> > be a 4:3 screen inside the 16:9 window (like TV news
> > or a talk show, any non-HD material).  The audio has
> > terrible stutters.  This stuttering occurs on PBS,
> > ABC, CBS, UPN, and Fox.  The stuttering does not occur
> > on the WB and NBC.  Both the WB and NBC channel are
> > owned by the same company and broadcast from the same
> > tower.  This stuttering does not occur on HD material.
> >  Mythfrontend and backend give no errors.  When run in
> > verbose mode, mythfrontend says "Audio thread waiting
> > for buffer to fill fragment_size=4096, audiolen=4096".
> >  Again, this stuttering doesnt occur on true HD
> > material.  I am using the optical output of my sound
> > card.  I do not have "AC3 output" in Mythtv setup.  I
> > do have "Agressive Buffering" and "Extra Buffering"
> > enabled.  Changing these seems to make no difference
> > or other options seems to not help.
> >
> > Live TV has some issues.  The OSD seems to really
> > botch up playback on live streams.  If I go directly
> > to "Watch TV" it pops up the picure and everything is
> > fine (because it never brings up the OSD).  If I
> > change channels the OSD come ups and everything starts
> > to stutter and slow.  Sometimes it doesnt ever catch
> > up and the frontend crashes or just displays a picture
> > at 1 frame per second.  Even when the OSD disappears,
> > it won't "catch".
> >
> > The hdtv-recorder-v7 patch did not work at all for me.
> >  Whenever I tried to record something from Fox or PBS
> > mythbackend seg faulted immediately.  V6 does not
> > crash, and works great with my setup.
> >
> >
> >
> > _______________________________________________
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> > mythtv-users at mythtv.org
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>
>