[mythtv-users] tzap versus mythtv - DVB channel change issues

Doug Scoular dscoular at cisco.com
Tue Jun 28 03:25:23 UTC 2005


Hi All,
    I've just bought a:

AVerMedia AverTV DVB-T USB 2.0 (A800)

    and hooked it up to my MythTV 0.18.1 box running
    gentoo.

    I've noticed that this tiny USB 2.0 DVB-T tuner
    works flawlessly using recent dvb-kernel code
    from linuxtv.org CVS. tzap tunes quickly and cleanly and
    I can capture MPEG-2 without problems via
    cat /dev/dvb/adaptor1/dvr0 > test.mpg.

    However, when I fire up MythTV I have problems.

    MythTV has no problem tuning to the start channel (10),
    but if I try and change channels it fails to get lock
    and I see the following in the logs:

2005-06-27 19:50:57.503 DVB#1 Recorder: Card opened successfully (using 
PS mode).
2005-06-27 19:50:57.510 DVB#1 Data read from DMX - This is for debugging 
with transform.c
2005-06-27 20:08:00.896 DVB#1 DVB signal 890c | snr  3 | ber 1fffff | 
unc ffff
2005-06-27 20:08:02.021 DVB#1 DVB signal ff3f | snr  1 | ber 1fffff | 
unc ffff
... removed identical repeated lines ...
2005-06-27 20:08:34.845 DVB#1 DVB signal ff3f | snr  1 | ber 1fffff | 
unc ffff
2005-06-27 20:08:35.449 DVB#1 WARNING - Status: NO LOCK!
2005-06-27 20:08:35.450 DVB#1 ERROR - Tuning for channel #9 failed.
Unable to write to client socket, as it's no longer there
2005-06-27 20:08:36.453 DVB#1 WARNING - No data from card in 1 second.
... removed identical repeated lines ...
2005-06-27 20:08:49.462 DVB#1 WARNING - No data from card in 1 second.
2005-06-27 20:08:50.010 Changing from WatchingLiveTV to None
2005-06-27 20:08:50.452 Couldn't read data from the capture card in 15 
seconds. Stopping.

    So any ideas why tzap would work while MythTV has issues ?

    Note that DVB#0 is a Hauppauge Nova-T PCI card that works
    flawlessly. Both share the same antenna.

    Any thoughts much appreciated.

    Cheers,
    Doug


More information about the mythtv-users mailing list