noreply at mythtv
May 31, 2012, 11:15 AM
Post #1 of 3
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Ticket #10781: DVB TableID 0x82
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#10781: DVB TableID 0x82
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Reporter: j.d.vogelsang@… | Owner: danielk
Type: Bug Report - General | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - DVB | Version: Master Head
Severity: medium | Keywords: DVB tableID EIT
Ticket locked: 0 |
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in mpegtables.h:
{{{
// DVB Conditional Access
DVBCAbeg = 0x80,
DVBCAend = 0x8f,
// Dishnet Longterm EIT data
DN_EITbego = 0x80, // always on pid 0x300
DN_EITendo = 0xfe, // always on pid 0x300
}}}
But in dvbtables.cpp
{{{
is_eit |= (TableID::SC_EITbego <= table_id &&
TableID::SC_EITendo >= table_id);
}}}
Well and here comes the problem: I have some channels where I receive CA
data in table 0x80, but they are treated as EIT-data and additionally a
CRC-value is calculated (and fails):
mpegtables.cpp
{{{
// Dishnet Longterm EIT data
if (TableID::DN_EITbego <= TableID() &&
TableID() <= TableID::DN_EITendo)
{
has_crc = true;
}
}}}
{{{
2012-05-28 17:24:24.256652 E PSIPTable: Failed CRC check 0x8dec147c !=
0x8155bb9c for StreamID = 0x82
2012-05-28 17:24:24.256657 E PSIP table 0x82 is invalid
2012-05-28 17:24:24.256663 E PSIPTable: Failed CRC check 0x8dec147c !=
0xe4dbb3d5 for StreamID = 0x83
2012-05-28 17:24:24.256665 E PSIP table 0x83 is invalid
2012-05-28 17:24:24.256671 I PESPacket: Failed CRC check 0x90484607 !=
0xc94cb6d5 for StreamID = 0x82
2012-05-28 17:24:24.256673 E PSIP packet failed CRC check. pid(0x1000)
type(0x82)
2012-05-28 17:24:24.259807 I PESPacket: Failed CRC check 0x90484607 !=
0x3681d3b for StreamID = 0x83
2012-05-28 17:24:24.259814 E PSIP packet failed CRC check. pid(0x1002)
type(0x83)
}}}
Maybe the failing CRC check is also a problem of my tv card (Philips
TDA10023 DVB-C, no CA module connected), but in general mythtv should
check more carefully if it is really an EIT table. I get some stuttering
of playback everytime a CRC check fails (but I think the main reason is
the EIT-thing). Output of "dvbsnoop -s pidscan" attached.
--
Ticket URL: <http://code.mythtv.org/trac/ticket/10781>
MythTV <http://code.mythtv.org/trac>
MythTV Media Center
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