[mythtv-users] Video card update fail
Allen Edwards
allen.p.edwards at gmail.com
Sat Oct 13 16:38:33 UTC 2018
On Sat, Oct 13, 2018 at 8:43 AM John Pilkington <johnpilk222 at gmail.com>
wrote:
> On 13/10/18 15:50, Allen Edwards wrote:
> >
> >
> > On Sat, Oct 13, 2018 at 7:35 AM Allen Edwards <allen.p.edwards at gmail.com
> > <mailto:allen.p.edwards at gmail.com>> wrote:
> >
> >
> >
> > On Sat, Oct 13, 2018 at 2:31 AM Stephen Worthington
> > <stephen_agent at jsw.gen.nz <mailto:stephen_agent at jsw.gen.nz>> wrote:
> >
> > On Fri, 12 Oct 2018 09:12:27 -0700, you wrote:
> >
> >
> > >After my wife was done watching, I ran this command
> "mythbackend
> > >--setverbose record" and started looking at the log while
> > recording some
> > >random show.
> > >
> > >What I see is a lot of messages like this
> > >Oct 12 09:09:19 NewMyth mythbackend: mythbackend[867]: W
> > HDHRStreamHandler
> > >recorders/dtvrecorder.cpp:1573 (ProcessAVTSPacket) DTVRec[1]:
> > A/V PID 0x51
> > >discontinuity detected ((6+1)%16!=14) 0.00%
> > >
> > >None of the score = 0 type and I have not watched the show to
> > see if there
> > >are issues. Are the messages that say "discontinuity detected"
> > significant?
> >
> > Unfortunately, those discontinuity messages do not seem to be
> > necessarily significant. I do get them when the recording is OK
> - I
> > think they can happen when ad breaks get inserted and the video
> > stream
> > is disrupted by that. But I only seem to get them from my DVB-S
> > tuners via minisatip, so I have not ruled out a bug in minisatip
> > from
> > being the cause. If there are lots of them, that is likely to
> > indicate a problem, but an occasional burst of just one or two
> at a
> > time (like I get) does not seem to indicate a real problem. As
> > best I
> > can determine, the ones I get when the recording does have a
> problem
> > will have a final calculated % value that is non-zero. The ones
> > that
> > I get that do not correspond to a bad recording all seem to have
> a
> > final calculated value of 0.0 % or a very small number (<
> > 0.00001 %).
> > _______________________________________________
> >
> >
> > I see lots of the the discontinuity detected messages but looking at
> > the time stamps, they are in groups of one or two.
> > Taking yesterday as a test day, I saw glitches in programs on both
> > HDHomerun units, on different channels, one UHF and one VHF, and I
> > saw no overall_score="0". That said, I erased the show from the
> > second HDHomerun so I can't prove it actually recorded on that unit
> > so I need to repeat that.
> >
> > I will not rule out a signal strength problem but I would be very
> > surprised if the VHF channel had a problem. The UHF channel is
> > typically more difficult to get. I would also not expect
> > interference to hit both channels.
> >
> > The only thing I can think to do now, other than repeating the
> > HDHomerun experiment, is to watch a show live on the TV and then
> > watch the recorded version. Anyone have other ideas?
> >
> > Allen
> >
> >
> > I should have added that the "discontinuity detected" messages are
> > coming at an average rate of 11 per minute. Might be scene changes in
> > the source as this is a news show and they change scenes at about that
> rate.
> >
> > Allen
> >
>
> I haven't gone back through this thread for all the details, but ISTR
> that, unusually in the US, ypu are using EIT program info. I found,
> quite recently, that I got defective recordings, with packets dropped or
> out of order, when doing too much 'active' scanning. Look at your
> backend settings. Both these threads are long and not conclusive
>
> https://lists.gt.net/mythtv/dev/618967?search_string=EIT%20activity;#618967
>
> and possibly also https://code.mythtv.org/trac/ticket/13066
>
> John
>
I do believe that I have EIT disabled as when it was enabled it overwrote
my Schedules Direct listings so I only got listings for a day or so.
Absolutely Mythweb shows all channels have useonairguide unchecked.
The last thread you linked is interesting in that the poster had the same
problem I do and proved it was not in the OTA source. Then the list owner
closed it as not a MythTV problem. Final comment that it might be EIT but
no resolution. Anyway, I don't think I have EIT in use. I will check the
backend setup to make sure it is still unchecked there.
Allen
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