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MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem

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Jul 12, 2012, 10:06 AM

Post #1 of 13 (1291 views)
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MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem

Hi list,

is there anyone with a similar problem (and a perhaps solution)?

Using an HD Homerun DVB-C box on the master-backend, it produces
megabytes of the following erros when debug-verbosity is set to "most":

2012-07-12 17:27:30.720194 E [22069/22135] HDHRStreamHandler
mpeg/mpegstreamdata.cpp:972 (HandleTSTables) - PSIP table 0x83 is invalid

2012-07-12 17:27:30.720205 E [22069/22135] HDHRStreamHandler
mpeg/mpegtables.cpp:218 (VerifyPSIP) - PSIPTable: Failed CRC check
0xbf0d749b != 0x8c18dc63 for StreamID = 0x82

With verbosity set to "important, general,channel" there's only this error:

2012-07-12 17:39:28.745128 E [22413/22480] HDHRStreamHandler
mpeg/mpegstreamdata.cpp:362 (AssemblePSIP) - Error: offset>181, pes
length & current cannot be queried

Watching LiveTV adds this messages to the backend log:

2012-07-12 17:43:02.561780 E [22413/22598] HDHRStreamHandler
dtvsignalmonitor.cpp:347 (HandlePMT) - DTVSM(1220B6ED-0): Wrong PMT;
pmt->pn(28463) desired(28106)

Video and sound is garbled in recordings and LiveTV, while everything
works fine with VLC on Linux and on a Windows 7 machine.

Thx
Daniel
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dekarl at spaetfruehstuecken

Jul 12, 2012, 2:32 PM

Post #2 of 13 (1206 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

On 12.07.2012 19:06, Daniel Di Giacomo wrote:
> is there anyone with a similar problem (and a perhaps solution)?

I don't have a solution, sorry. But I can point out some things that
are not the issue :-)

Others have a similar / the same problem
http://www.mythtv.org/pipermail/mythtv-users/2012-January/326908.html
http://www.mythtv.org/pipermail/mythtv-users/2012-April/332500.html

> Using an HD Homerun DVB-C box on the master-backend, it produces
> megabytes of the following erros when debug-verbosity is set to "most":
>
> 2012-07-12 17:27:30.720194 E [22069/22135] HDHRStreamHandler
> mpeg/mpegstreamdata.cpp:972 (HandleTSTables) - PSIP table 0x83 is invalid
>
> 2012-07-12 17:27:30.720205 E [22069/22135] HDHRStreamHandler
> mpeg/mpegtables.cpp:218 (VerifyPSIP) - PSIPTable: Failed CRC check
> 0xbf0d749b != 0x8c18dc63 for StreamID = 0x82

The CRC Error is a false positive and can be ignored, see
http://code.mythtv.org/trac/ticket/10495

The other errors can be due to bad signal quality, but if the same
channel works in VLC but not MythTV, then its likely something else.

Did these / this channel work before in MythTV?

Does the problem only show on a single multiplex / frequency?

If its an issue with the multiplex then it should only apply to ARD
stations (see
http://de.wikipedia.org/wiki/Kabel-Multiplex-_und_Compression-Center )
Btw, I have already successfully recorded from that multiplex (some
months ago and with a plain PCI DVB card. I'm guessing your provider is
Unitymedia based on your whois data)

Regards,
Karl
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dekarl at spaetfruehstuecken

Jul 12, 2012, 4:16 PM

Post #3 of 13 (1204 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

On 12.07.2012 23:32, Karl Dietz wrote:
> On 12.07.2012 19:06, Daniel Di Giacomo wrote:
>> is there anyone with a similar problem (and a perhaps solution)?
>
> I don't have a solution, sorry. But I can point out some things that
> are not the issue :-)
>
> Others have a similar / the same problem
> http://www.mythtv.org/pipermail/mythtv-users/2012-January/326908.html
> http://www.mythtv.org/pipermail/mythtv-users/2012-April/332500.html

I just saw http://code.mythtv.org/trac/ticket/10414#comment:15 pass by.
UDP receive errors match your symptoms quite well.

> The other errors can be due to bad signal quality, but if the same
> channel works in VLC but not MythTV, then its likely something else.

Regards,
Karl
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lists at dadigi

Jul 12, 2012, 4:27 PM

Post #4 of 13 (1195 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

Am 12.07.2012 23:32, Karl Dietz wrote:

> The CRC Error is a false positive and can be ignored, see
> http://code.mythtv.org/trac/ticket/10495

Yes I've found this ticket in the meantime.

> The other errors can be due to bad signal quality, but if the same
> channel works in VLC but not MythTV, then its likely something else.
>

No it doesn't seem to be a signal quality issue.
There is only on frequency where signal quality is very poor (
a8qam256-6900:426Mhz with only around 50%).
Here I don't expect any reasonable results.
The others are quite ok between 70% and 85%.
I cannot detect any packet losses in the net and as said before, it
works fine with other software.

> Did these / this channel work before in MythTV?

Yes. I can record and watch all this channels from the KNC-One
PCI-tuners in my slave-backend, which is connected to the same 4-way
antenna amplifier.

> Does the problem only show on a single multiplex / frequency?

No it shows on all frequencies

> If its an issue with the multiplex then it should only apply to ARD
> stations (see
> http://de.wikipedia.org/wiki/Kabel-Multiplex-_und_Compression-Center )
> Btw, I have already successfully recorded from that multiplex (some
> months ago and with a plain PCI DVB card. I'm guessing your provider is
> Unitymedia based on your whois data)
>

That's right, provider is Unitymedia

Regards
Daniel
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lists at dadigi

Jul 12, 2012, 4:39 PM

Post #5 of 13 (1198 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

Am 13.07.2012 01:16, schrieb Karl Dietz:
> On 12.07.2012 23:32, Karl Dietz wrote:

> I just saw http://code.mythtv.org/trac/ticket/10414#comment:15 pass by.
> UDP receive errors match your symptoms quite well.

No there are no UDP-drops on backend- or frontend-side
Resizing recieve buffer didn't help also (sysctl -w
net.core.rmem_max=2097152).

Regards
Daniel
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lists at dadigi

Jul 13, 2012, 12:32 PM

Post #6 of 13 (1184 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

Am 13.07.2012 01:27, I wrote:
> No it doesn't seem to be a signal quality issue.
> There is only on frequency where signal quality is very poor (
> a8qam256-6900:426Mhz with only around 50%).
> Here I don't expect any reasonable results.
> The others are quite ok between 70% and 85%.
> I cannot detect any packet losses in the net and as said before, it
> works fine with other software.
>
>> Did these / this channel work before in MythTV?
>
> Yes. I can record and watch all this channels from the KNC-One
> PCI-tuners in my slave-backend, which is connected to the same 4-way
> antenna amplifier.
>

Some tuning of the antenna amplifier brought me to an average signal
quality of about 70% on the 426Mhz-frequenzy and 90% (100% signal
strength, 100% symbol quality) on all others.
But this increase still has not shown much improvement of video and
sound quality in mythfrontend for the Homerun-box.
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dekarl at spaetfruehstuecken

Jul 15, 2012, 2:18 AM

Post #7 of 13 (1201 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

Hmm, I'm out of ideas. There is also a thread over at Silicon
Dust's forum at http://www.silicondust.com/forum/viewtopic.php?t=13018

Regards,
Karl
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edmund.1 at dial

Jul 15, 2012, 4:19 AM

Post #8 of 13 (1170 views)
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Re: After upgrade to 0.25 mythtv won't accept more than 2 tuners [In reply to]

[Solved]

My inability to schedule with more than two tuners was down to not
enough /tmp space for mysql.

I have been using a 200MB RAM tmpfs. This has always been fine, but
some of the temporary tables seem to be very large (they are deleted
very quickly but one was 119MB). I moved my temporary table setting in
my.cnf and everything now works well.

I must thank Brian Murrell's post for leading me to my solution
http://www.mythtv.org/pipermail/mythtv-users/2011-December/325247.html

E
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lists at dadigi

Jul 18, 2012, 11:12 AM

Post #9 of 13 (1133 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

Thanks for your help Karl.

So once again another 150 Euro for nothing.

<rant>MythTV has stopped being fun with 0.21. It's getting crappier with
every new version. Who needs a broken android-client while even basic
features are almost unusable?</rant>

Am 15.07.2012 11:18, Karl Dietz wrote:
> Hmm, I'm out of ideas. There is also a thread over at Silicon
> Dust's forum at http://www.silicondust.com/forum/viewtopic.php?t=13018
>
> Regards,
> Karl
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users

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gjhurlbu at gmail

Jul 18, 2012, 1:08 PM

Post #10 of 13 (1124 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

Crappier in every version? Hardly.

Exactly how many Trac tickets have you opened with your issues? If you find
problems, it is your responsibility to actually report them as your setup
is likely fairly unique and you are likely hitting issues nobody else has
even seen. There's no way we can fix issues we've never even heard of.

joshoekstra at gmx

Jul 18, 2012, 2:07 PM

Post #11 of 13 (1120 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

Op 18-7-2012 22:08, Gavin Hurlbut schreef:
>
> Crappier in every version? Hardly.
>
> Exactly how many Trac tickets have you opened with your issues? If you
> find problems, it is your responsibility to actually report them as
> your setup is likely fairly unique and you are likely hitting issues
> nobody else has even seen. There's no way we can fix issues we've
> never even heard of.
>

I don't agree with the crappier comment at all even if I do have the
same problem which was seen by Karl.
As soon as I get back from my holiday I'll try to gather enough info for
a ticket.
In short for me it's one frequency but all channels on that frequency
are affected, using the quickview optiin from sillicondust which opens
VLC there's no hiccup whatsoever. Since no one ever responded to my
mail, I assumed pebkac on my side.

Jos Hoekstra
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lists at dadigi

Jul 28, 2012, 12:57 PM

Post #12 of 13 (1037 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem (#10947) [In reply to]

http://code.mythtv.org/trac/ticket/10947

Daniel
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Aug 4, 2012, 3:30 PM

Post #13 of 13 (992 views)
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Re: MythTV 0.25.1-fixes / HDHR3-EU DVB-C problem [In reply to]

Am 18.07.12 22:08, schrieb Gavin Hurlbut:
>
> Crappier in every version? Hardly.
>
That's my subjective impression concerning DVB-C/LiveTV ...

> Exactly how many Trac tickets have you opened with your issues?
>
one (a week ago): http://code.mythtv.org/trac/ticket/10947

--
Regards
Daniel

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