[mythtv-users] DVB-T tzap versus mythtv 0.19

[Mike Parkins]

You are not alone - My 0.19 system takes about 10 to 12 seconds to change 
channels. I asked about this once but the only reply I had was from some 
bright spark who suggested I should only be watching recorded programs... :(

mike.

On Saturday 04 Mar 2006 09:04, Doug Scoular wrote:
> Hi All,
>     A number of my colleagues and I have just upgraded our systems
>     to mythtv 0.19.
>
>     I'm running a gentoo system with a genkernel 2.6.15-gentoo-r5 kernel.
>
>     I have a Hauppauge Nova-T DVB-T card as my primary tuner and
>     an AVerMedia AverTV DVB-T USB 2.0 (A800) external tuner.
>     While my colleagues all have Nova-T based systems.
>
>     0.18.1 changed channels and worked perfectly for the Nova-T but
>     I always had problems with using the A800 (although tzap worked
>     fine with both cards).
>
>     Now that we've upgaded to 0.19 changing channels takes significantly
>     longer for the Nova-T, sometimes fails to get LOCK and occasionally
>     locks up the frontend too.
>
>     Is anyone running mythtv 0.19 with a Nova-T and getting similar
>     speed channel changing compared with 0.18.1 ? None of us are.
>
>     Also, my A800 never gets LOCK at all and reports S/N 0.0dB and BE 65535
>     but a signal of 99%... however it works perfectly with tzap!?!!
>
> spug log # tzap -a 1 'NINE DIGITAL' -r
> using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0'
> reading channels from file '/root/.tzap/channels.conf'
> tuning to 191625000 Hz
> video pid 0x0207, audio pid 0x02d0
> status 03 | signal ad31 | snr 0000 | ber 001fffff | unc 0000ffff |
> status 1f | signal ad32 | snr 0000 | ber 00000000 | unc 00000000 |
> FE_HAS_LOCK
> status 1f | signal 0000 | snr ffff | ber 00000000 | unc 00000000 |
> FE_HAS_LOCK
> status 1f | signal 0000 | snr ffff | ber 00000000 | unc 00000000 |
> FE_HAS_LOCK
>
>     And yes, all channels were rescanned using mythtv 0.19. I
>     also increased both the A800 tuning timeouts in mythtv-setup
>     by tenfold. I'm wondering if the fact the driver is indicating
>     that the signal is zero once tuned in the above. For comparison
>     here's the same output from tzap for the Nova-T card:
>
> spug szap # tzap -a 0 'NINE DIGITAL' -r
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> reading channels from file '/root/.tzap/channels.conf'
> tuning to 191625000 Hz
> video pid 0x0207, audio pid 0x02d0
> status 00 | signal c4c4 | snr ffff | ber 0001fffe | unc 00000000 |
> status 1f | signal c3c3 | snr fefe | ber 00000422 | unc 00000000 |
> FE_HAS_LOCK
> status 1f | signal c3c3 | snr fefe | ber 00000700 | unc 00000000 |
> FE_HAS_LOCK
> status 1f | signal c3c3 | snr fefe | ber 00000642 | unc 00000000 |
> FE_HAS_LOCK
> status 1f | signal c4c4 | snr fcfc | ber 00000570 | unc 00000000 |
> FE_HAS_LOCK
> status 1f | signal c4c4 | snr fefe | ber 000004dc | unc 00000000 |
> FE_HAS_LOCK
>
>     These figures look far more realistic compared to the A800 output.
>
>     Any thoughts much appreciated...
>
>     Doug
>
> --
> "The big print giveth and the small print taketh away."
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