[mythtv-users] MythTV - 0 : 1- Zoneminder

Tom corcoran tomc at osits.com
Thu Jun 7 13:07:05 UTC 2012







Sent: 5. juni 2012 4:43 Tom Corcoran wrote:

Hi
Several weeks ago I added a CCTV card to my work MythTV system in the 
hope of running Zoneminder on the same ox as my Backend server which is 
idle for most of the time. The card I added has 4 SAA7134 chips on board 
and is detected in by Mythbuntu successfully, Zoneminder setup was stet 
raight forward and I can view my couple of CCTV cameras perfiectly.
The same cannot be said unfortunately for Mythtv, since adding the card 
I can no longer tune in my Hauppauge DVB S2 card to any satellite 
channel, keep receiving a channel change failure error on screen, see 
backend log below.

<mythbackend.log:
2012-06-04 23:14:52.830 DVBSM(/dev/dvb/adapter1/frontend0), Warning:
Cannot count Uncorrected Blocks
eno: Operation not supported (95)
2012-06-04 23:14:52.837 DiSEqCDevTree, Error: No root device tree node!
2012-06-04 23:14:52.910 DVBChan(1:/dev/dvb/adapter1/frontend0) Error:
Tune(): Failed to setup DiSEqC devices
2012-06-04 23:14:52.948 DVBChan(1:/dev/dvb/adapter1/frontend0) Error:
SetChannelByString(17): Tuning to frequency.
2012-06-04 23:14:53.016 SignalMonitor: channel change failed
2012-06-04 23:14:53.099 SignalMonitor: channel change failed \>

<dmesg:
[425508.140655] init: mythtv-backend main process (18967) killed by TERM 
signal [427719.001693] DVB: adapter 1 frontend 0 frequency 89399980 out 
of range (950000..2150000) [427719.337693] DVB: adapter 1 frontend 0 
frequency 89399980 out of range (950000..2150000) />

I have tested the scan utility from the command line and can detect all 
the channels as originally scanned, I have removed the cards from 
Mythtvsetup and re-added it without success. If I remove the SAA7134 
card I instantly get all my Sat channels back in Mythtv :-( I also have 
Hauppauge Nova DVB-T card with local Irish channels which is unaffected 
by the Zoneminder hardware?

Anybody got any ideas as I really want these two systems to play nice ?


Many thanks for reading.

TomC
MythTV 0.24
Mythbuntu 11.10
-----Original Message-----

Are you running 32 or 64 bit OS?

If you are running 32 bit it is possible that your system is running out 
of virtual memory.

Look for something like this from dmesg:
[ 15.863906] vmap allocation for size 16781312 failed: use 
vmalloc=<size> to increase size.

Jens



It doesnt appear to be related to virtual memory, there are no related 
messages in the syslog.
To further troubleshoot this issue I have stopped the backend and 
manually tune to a DVB stream using

'szap -a 1 -c /home/tomc/channels.conf E4'

this appears to lock on to the stream outputting

'status 1f | signal f800 | snr f759 | ber 00000000 | unc fffffffe | 
FE_HAS_LOCK
status 1f | signal f800 | snr f53c | ber 00000000 | unc fffffffe | 
FE_HAS_LOCK'

If I then try and record this stream using

'cat /dev/dvb/adapter1/dvr0 > /tmp/video.mpeg'

The file always appears as a zero byte file......any help would be 
greatly appreciated.

TomC









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