On Tue, Mar 31, 2009 at 12:57 PM, Dave Johansen <davejohansen@xxxxxxxxx> wrote: > On Mon, Mar 30, 2009 at 2:47 PM, Devin Heitmueller > <devin.heitmueller@xxxxxxxxx> wrote: >> On Mon, Mar 30, 2009 at 5:37 PM, Dave Johansen <davejohansen@xxxxxxxxx> wrote: >>> I am trying to get a MythTV setup working with a DViCO FusionHDTV7 >>> Dual Express using Mythbuntu 8.10 and I have been able to generate a >>> channels.conf file using the latest v4l-dvb source code and the scan >>> utility that comes with the dvb-utils in Mythbuntu (the dvbscan >>> utility in latest dvb-apps source code give me the error "Unable to >>> query frontend status"). I am also able to watch channels using >>> mplayer, but the the problem is that MythTV does not identify any >>> channels. I am able to watch channels using MythTV, but I have to >>> manually enter the channel data since the tuning is not working. >>> >>> The belief is that the signal strength and SNR output must be >>> incorrect and that is causing the problem with MythTV. I would like to >>> help get this fixed, so others don't have the problems that I have run >>> into, so what can I do to help get the signal strength and SNR outputs >>> working? >>> >>> If it's helpful, I have attached an example output using azap with one >>> of the channels that I can watch with mplayer: >>> >>> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' >>> tuning to 503028615 Hz >>> video pid 0x0011, audio pid 0x0014 >>> status 01 | signal e000 | snr e450 | ber 00000000 | unc 00000000 | >>> status 1f | signal 00ff | snr 00ff | ber 00000000 | unc 00000000 | FE_HAS_LOCK >>> status 1f | signal 00ff | snr 00ff | ber 00000ab7 | unc 00000ab7 | FE_HAS_LOCK >>> status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK >>> status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK >>> status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK >>> status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK >>> status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK >>> status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK >>> status 1f | signal 00fa | snr 00fa | ber 00000000 | unc 00000000 | FE_HAS_LOCK >>> >>> Thanks, >>> Dave >> >> Hello Dave, >> >> There has been an ongoing discussion about the representation of SNR >> and strength to applications such as MythTV. Currently it is very >> inconsistent across drivers. >> >> To my knowledge, MythTV does not rely on either of these fields during >> its scanning. It relies entirely on the FE_HAS_LOCK to make it's >> determination. >> >> You should probably see what additional logging capabilities are >> available in MythTV. >> >> Also, you might want to see if you can change the lock timeout in your >> application, as some applications may have the interval set to a value >> too short, which results in it timing out before the lock is acquired. >> >> Devin >> >> -- >> Devin J. Heitmueller >> http://www.devinheitmueller.com >> AIM: devinheitmueller >> > > So, I tried upping the tuning timeout and MythTV under Mythbuntu 8.10 > was able to find 1 of the channels (I can find 19 using scan and > azap). > > I then downloaded the Mythbuntu 9.04 beta and got a new antenna. The > driver worked out of the box so I didn't need to download/compile the > latest v4l-dvb drivers, and it was able to get all 19 channels in > MythTV (it took 3 or 4 scans to finally get them all). I realize that > that wasn't the most scientific approach, so I will re-try with the > old antenna and see if it was the antenna or the software upgrade that > did the trick. > > I also tried cranking the tuning timeout up to 15 seconds and it still > couldn't find all of the channels during every scan. Is that something > that I need to look into from a MythTV perspective? Or is there > something wrong with v4l-dvb that's causing that? MythTV's channel scanner is undergoing heavy changes in svn trunk. By the time 0.22 comes out, I suspect that MythTV's built-in channel scanner will be of a much higher quality. If you want to get all your channels, I recommend creating your own channels.conf using the command line utilities, then import that into mythtv via mythtv-setup. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
