[linux-dvb] Help! I cant view video. BUT I can scan!!

hermann pitton hermann-pitton at arcor.de
Wed Feb 13 19:20:26 CET 2008


Hi!

Am Sonntag, den 10.02.2008, 23:37 +0100 schrieb Per Blomqvist:
> Thanx! Now it works!!
> 
> Watching some Danish (Dansk) channel, about Napoleon.
> 
> Thanx again, for mocking me up.. It was the channel.conf, that was wrong
> 
> The channel.conf -file that I used before, was 6 month old and from my 
> previous computer.
> (Now "dvbscan" doesn't detect anything on that bandwidth. And that "TV6" 
> was on that..
> 
> If I run dvdscan against the closest mayor city (Malmö in my case, here 
> in south Sweden), it only tunedin encrypted channels. BUT, against  all 
> of Denmark (file "dk-All") I get a some..
> 
> Its strange though.. I CAN SEE "TV6" unencrypted, but in Windows XP. But 
> there with A program called "PowerCinema" is used (in XP OS).
> (tuning is a fuzz there also, I believe "PowerCinema" download channels 
> and guides and what, from the internet. It would maybe be a point to 
> retrieve its (channel) configure file. I have looked, but found none.
> 
> Another question now, how is all these "initial-tuning-data" created??

Either the broadcasters provide them or people try as good they can.
Since different channel decoders vary in the tolerance for having
something wrong there, and also broadcasters often change something,
with the tda10046 better try as recommended.

> redeb:~/.tzap# cat dk-All
> # Denmark, whole country
> # Created from http://www.digi-tv.dk/Indhold_og_tilbud/frekvenser.asp
> # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
> T 482000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 506000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 538000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 554000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 602000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 658000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 682000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 690000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 714000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 738000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 778000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 826000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> T 834000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE
> 
> redeb:~/.tzap# cat se-Malmo
> # Sweden - Malmö
> # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
> T 482000000 8MHz 3/4 NONE QAM64 8k 1/4 NONE
> T 506000000 8MHz 3/4 NONE QAM64 8k 1/4 NONE
> T 618000000 8MHz 2/3 NONE QAM64 8k 1/8 NONE
> T 818000000 8MHz 3/4 NONE QAM64 8k 1/4 NONE
> T 850000000 8MHz 3/4 NONE QAM64 8k 1/4 NONE
> 
> Can I compose one, of these by myself (from other nearby citys), or how?

There are a lot of Swedish channels.conf in dvb-apps now.
In "kaffeine" you just select the transmitters in the dvb configuration.

You also can combine multiple transmitters or try with
"w_scan".
http://wirbel.htpc-forum.de/w_scan/index2.html
http://edafe.org/vdr/wscan.html

> hermann pitton wrote:
> > Hi,
> >
> > Am Sonntag, den 10.02.2008, 15:28 +0100 schrieb Per Blomqvist:
> >   
> >> Hello Jonas Andren.
> >> (Kom inte o säg att Anden är dansk)
> >>
> >> The Harware I have, I have said.  Its the media-card, is this: 
> >> http://www.linuxtv.org/wiki/index.php/Asus_My_Cinema-P7131_Hybrid
> >> (running on a amd64, mother-board m2a-vm.. Inköpt på Kjell&Co byggsats 
> >> för 2 veckor sedan...
> >>
> >> I also said that the same Media-card did function (somewhat) on my old 
> >> computer (a PII330MHz, though with terrible video result). And it works 
> >> in Windows XP. So, the Media-card function.
> >>
> >> I downloaded&installed  linuxtv-dvb-apps-1.1.1.tar.bz2 
> >> <http://www.linuxtv.org/downloads/linuxtv-dvb-apps-1.1.1.tar.bz2>
> >> (and all so called utils: "dvbdate" "dvbtrafick" "scan" and "zap" 
> >> worked. BUT, nothing under the test)
> >>     
> >
> > you should prefer dvb-apps from mercurial, but that is not so important.
> >
> >   
> 
> There is a deb-package called "mercurial".
> (I suspect it doesnt have anything, todo with this, no?)

http://www.linuxtv.org/repo

You will find recent initial tuning and channels.conf files in dvb-apps.

> > First of all I would like to see relevant "dmesg" stuff for the card
> > and tuner to see if it is still likely the same card, auto detected and
> > eeprom content unchanged and all chips alive. If you enable i2c_scan=1
> > you look first for the devices found.
> >   
> I used the linux-kernels-source. in its documents for this. Downloaded 
> the firmware..
> (I include dmesg output in the end of this email, anyway. The revision 
> is 20, and not a LifeView fabrication..

Thanks. It is the known card with LNA.

According to Asus, Philips/NXP firmware prior to revision 26 had
problems with missing channels. 

> > Also we never saw, if your firmware upload is successful and if you use
> > preferably revision 29 with such a card with Low Noise Amplifier.
> > If not, download it from LifeView with the script in /Documentation/dvb
> > and do a cold boot. (recent stuff is in a v4l-dvb mercurial snapshot)

All the older P7131 Dual cards have a firmware eeprom and only the
oldest revision needed an upgrade. Since you have no firmware on eeprom 
"./get_dvb_firmware tda10046lifeview".

> > Antenna input for DVB-T is FM/RF input.
> >
> > Can you point to the initial tuning file you are using or to what you
> > believe is a valid channels.conf file for you?
> >
> > It is always worth a try to set all to AUTO in the initial tuning file,
> > except frequency to tune and bandwidth and then use "scan" to create a
> > channels.conf.
> >   
> 
> Yes, now my system is relatively fresh, again (I dont load any 
> kernel-module with any extra options).
> 
> > If still not, we install the recent v4l-dvb, remove all old modules and
> > might try to debug from there.
   
> 
> I also tried to compile the kernel (there was this option there 
> VIDEO_ADV_DEBUG). But unfortunately I cut away so other stuff, soo the 
> new kernel got panic at bootup. Another story..

With kernel devel environment installed v4l-dvb from the mercurial
master repository is easy to use. (currently down to 2.6.19, sysfs
compat for 2.6.18 is broken, >= 2.6.20 works for sure)

> It was the "channel.conf" that was wrong.. Thx again!
> (what a fuzz)
> 

Sorry, but for example with "kaffeine" and "w_scan" you should be fine.

Cheers,
Hermann





More information about the linux-dvb mailing list