[mythtv] Re: dvb zero length record

Thu Jun 16 13:13:27 UTC 2005

I don't know if my problem is related to this, but I seem to be having
a similar issue, except that it happens every single time.  I have a
system with two tuner cards: a Nova-T (cx88-dvb driver) and a DEC
2000-T (ttusb_dec).  Until a couple of days ago, both cards were
working fine, but then the Nova-T stopped working, and I'm getting the
below errors (full SIParser output included).

This problem is happening in an identical fashion with all four combinations of:

kernel 2.6.9 + bytesex cx88-dvb patches
kernel 2.6.12-r6 (unpatched)

and 

MythTV 0.18.1
MythTV CVS from June 4th

I also tried applying Tom's mythtv-dvbtuning.patch to the CVS release,
but that didn't make any difference.

I've no idea what's triggered this, but my Nova-T card has ceased to
function in MythTV.  It still works fine if use tzap and mplayer to
read /dev/dvb/adapter1/dvr0 directly.  My DEC 2000-T is also still
working fine within MythTV.

I've also tried using both SW and HW decoder modes on the Nova-T, as
well as switching on and off  the Waiting for Seq header option in
mythtv-setup, to no avail.  Both cards are set to record in TS mode
(which again was working fine until a couple of days ago).

--------------------

Backend log file excerpt:

2005-06-16 14:03:24.656 DVB#1 DVB SI Table Parser Started
2005-06-16 14:03:24.657 DVB#1 Using DVB card 1, with frontend
Hauppauge Nova-T DVB-T.
2005-06-16 14:03:24.658 SIParser: Starting DVB Section Reader thread
2005-06-16 14:03:24.659 DVB#1 Trying to tune to channel 2.
2005-06-16 14:03:24.663 DVB#1 Frequency: 706000000. BW:8MHz HP:3/4
LP:2/3 C:16 TM:2K H:None GI:1/32
2005-06-16 14:03:24.663 SIParser: About to do a reset
2005-06-16 14:03:24.663 SIParser: Closing all PIDs
2005-06-16 14:03:24.698 SIParser: Starting SIScanner
2005-06-16 14:03:25.662 SIParser: Resetting all Table Handlers
2005-06-16 14:03:25.662 SIParser: SIParser Reset due to channel change
2005-06-16 14:03:25.662 DVB#1 Waiting for frontend event after tune.
2005-06-16 14:03:25.686 DVB#1 DVB signal 2b | snr ffff | ber    0 | unc    0
2005-06-16 14:03:25.992 DVB#1 Status: LOCK.
2005-06-16 14:03:25.992 SIParser: Requesting PAT
2005-06-16 14:03:25.992 DVB#1 Multiplex Locked
2005-06-16 14:03:25.993 SIParser: Adding a PMT (4227) to the request list
2005-06-16 14:03:26.680 SIParser: Table[0]->RequirePIDs() == true
2005-06-16 14:03:26.680 SIParser: Adding PID    0 Filter  0 Mask ff Buffer 40960
2005-06-16 14:03:26.684 SIParser: Table[2]->RequirePIDs() == true
2005-06-16 14:03:26.685 SIParser: Adding PID 1ffb Filter ff Mask  0 Buffer 40960
2005-06-16 14:03:26.685 SIParser: Table[3]->RequirePIDs() == true
2005-06-16 14:03:26.685 SIParser: Adding PID 1ffb Filter ff Mask  0 Buffer 40960
2005-06-16 14:03:26.686 SIParser: Table[6]->RequirePIDs() == true
2005-06-16 14:03:26.686 SIParser: Adding PID   10 Filter 40 Mask ff Buffer 40960
2005-06-16 14:03:31.072 SIParser: Private Type channel_numbers = 131
defined for NetworkID 9018
2005-06-16 14:03:31.072 SIParser: ChannelNumbers Present using Descriptor 131
2005-06-16 14:03:31.072 SIParser: Private Type guide_fixup = 2 defined
for NetworkID 9018
2005-06-16 14:03:31.073 SIParser: Using Guide Fixup Scheme #2
2005-06-16 14:03:31.073 SIParser: Unknown Descriptor: 41 12 10 43  1
10 83  1 10 ff  1 11 3f  1 11 7f  1 12
2005-06-16 14:03:31.073 SIParser: Unknown Descriptor: 5f  4  0  0
2005-06-16 14:03:31.074 SIParser: Unknown Descriptor: 41 27 20 4f  1
20 71  1 20 8f  1 20 c0  1 21  0  1 21  2  1 21  4  1 21  6  1 21  c 
1 21 78  c 21 90  1 21 ba  c 22
2005-06-16 14:03:31.075 SIParser: Unknown Descriptor: 5f  4  0  0
2005-06-16 14:03:31.075 SIParser: Unknown Descriptor: 41 45 32 42  1
33 40  1 37 80  1 37 c0  1 38  0  2 38 40  2 38 80  2 38 c0  2 39  0 
2 39 40  2 39 c0  c 3a  0  1 3a 80  1 3a c0  1 3b  0  1 3b 40  1 3b 80
 1 3c 80  1 3c c0  1 3d  0  1 3d 40  1 3d 80  1 3d
2005-06-16 14:03:31.076 SIParser: Unknown Descriptor: 5f  4  0  0
2005-06-16 14:03:31.077 SIParser: Unknown Descriptor: 41 27 41 80  1
41 c0  1 42 40  1 46  0  2 46 40  2 46 80  2 46 c0  2 47  0  2 47 40 
2 4c  0  1 4c 40  1 4c 80  1 4e
2005-06-16 14:03:31.077 SIParser: Unknown Descriptor: 5f  4  0  0
2005-06-16 14:03:31.078 SIParser: Unknown Descriptor: 41 18 56 40  1
56 80  1 56 c0  1 57  0  1 57 40  1 58 40  2 59 c0  2 5a
2005-06-16 14:03:31.079 SIParser: Unknown Descriptor: 5f  4  0  0
2005-06-16 14:03:31.080 SIParser: Unknown Descriptor: 41 33 64 40  1
64 80  1 64 c0  1 65  0  1 65 40  1 66 40  2 66 80  2 66 c0  2 67  0 
2 67 40  2 67 80  2 67 c0  2 68  0  2 68 40  2 69 40  c 69 80  c 69
2005-06-16 14:03:31.080 SIParser: Unknown Descriptor: 5f  4  0  0
2005-06-16 14:03:31.081 SIParser: Table[6]->Complete() == true
2005-06-16 14:03:31.081 SIParser: Table[5]->RequirePIDs() == true
2005-06-16 14:03:31.082 SIParser: Adding PID   11 Filter 46 Mask fb Buffer 40960
2005-06-16 14:03:32.147 DVB#1 Timeout Getting PMT
2005-06-16 14:03:32.148 DVB#1 ERROR - Tuning for channel #2 failed.

-- 
Des Herriott
des.herriott at gmail.com