Help! I cant view video. BUT I can scan!!

Hello, help!

I can "dvbscan" and "tzap", and gets indication of a good signal. BUT, I cant view the video!
(from the dvb device)

Also "dvbdate" command works (that returns time and date from the air, I presume). But not a command as "dvbsnoop" (that need "/dev/dvb/adapter0/dvr").

A sample: ( Its step by step of your guide:
http://www.linuxtv.org/wiki/index.php/Testing_your_DVB_device )

In one console I run: /.tzap# tzap -r -c channels.conf "TV4 Öresund" ( and are getting lines as:
status 1f | signal c3c3 | snr ffff | ber 0000004a | unc 00000000 | FE_HAS_LOCK
status 1f | signal c3c3 | snr ffff | ber 0000004e | unc 00000000 | FE_HAS_LOCK
...
AND in another console:
mplayer -v /dev/dvb/adapter0/dvr0
(thats basically halts without any further information)

ALSO if I type: "cat /dev/dvb/adapter0/dvr0 > afile.txt" (But then again, "afile.txt" remains empty)

Conclusion, /dev/dvb/adapter0/dvr0 never returns anything. This "/dev/dvb/adapter0/dvr" isnt proper. Must be a Linux-kernel/module problem..

Here are some further info of whats on my system:

* Media Card: "Asus P7131 Hybrid"
(This very same Media-card worked on an older machine, an old Pentium, that I now abandoned. Maybe I used the line "card=112 i2c_scan=1 tunar=54 gpio_tracking=1" when loading "saa7134" kernel-module, for this. By a gento wiki-tips (http://gentoo-wiki.com/HARDWARE_saa7134). I tested this line on this AMD64 machine also, but didnt make any difference..

* Linux-kernel, "2.6.22-3-amd64" (The only kernel I see in my Debian-testing apt list, cant use any other kernel, strange also..)

* The system, Its some dual AMD64, mother-board Asus "M2A-VM HDMI" (a card with most stuff built-in, as sound graphics.. etc) A common card (for building computers aimed toward media, as this is).

* Mplayer (for what its matter, gnu "cat" dint work ether, so it doesnt matter). I have compiled Mplayer myself, with everything possible included. Also, I have tested Debians deb-package called the same name, but without success (or difference).

Maybe I could include the returns of the old and new "lsmod", but the only difference there regarding this is, that I now dont use Alsa (sound system). Now I use the default outof-the-box-configurations (a fresh installation, this my system is, now). So I dont include what "lsmod" returns, in this email (because then I can continue with "lspci" "dmsg", and all possible and impossible sniff logs.. I dont know what may be relevant info, to solve this.

Any comments and Ideers are welcome! !

thx.

I just signed up for this mailing-list ( I hope this is the right forum.. thanx again. Also I hope the solution is simple.

Mvh, Per Blomqvist
Web: http://phoohb.shellkonto.se
Telnr: +46 70-3355632

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Hi, yes, you're in the right place.

Not so fast! If the channel is encrypted, this is precisely what you will observe ... though, because this is over-the-air that we're talking about, this seems less likely to be the case (but you will have to confirm nonetheless).

I'm more inclined to think that this is related to an issue with stream identifiers. Is Sweden using MP4 now?
Some further questions, what drivers are you using (distro or recent LinuxTV)?
What dvb-apps ... Christophe had updated the dvb-apps not to long ago with some changes in regards to MP4 streams (can't remember the exact nature, but perhaps you should grab a new copy from LinuxTV and try with those).

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The channel isn't encrypted.
(I have tested with many public chanels, that I know isnt encrypted. Cant get any video out)

Im Debian-tesing user, and this is a freshly installed system. On a amd64.. (as I mentioned, in previous email)

Turns out "/dev/dvb/adapter0/dvr0" isnt the only device that doesnt work. (framebuffer didnt work ether, "/dev/fd0" are missing totaly, regardless of bootloader vga=791 options or so).

I removed (by now mistake) older kernels when I distupgraded, cant nerrow down the error search, by testing other linux-kernels. (since I only have one, the 2.6.22-3-amd64)

And snapshot.debian.net didnt record any older.. Only option left, to start compilling by myslef.
(but to rough)

Probably testing another distro (Ubunto) next week.

Whatever frontend I test, it will not work.
The device, never stream anything.

I can tune, but not view the video.
(thats it)

Mvh, *Per **Blomqvist*
Web: http://phoohb.shellkonto.se
Telnr: +46 70-3355632

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I haven't followed this thread from the beginning, but did you say what kind of DVB hardware you have?

I know the Nova-TD stick is a bit picky. Too strong a signal will cause the behavior you describe on this device. On my Nova-TD, using a good antenna will yield no data stream (but a 100% signal), whereas if I use the little mobile antenna that came with the stick, I get a stream but mpeg artefacts in the picture (due to low signal).

I would try attenuating the signal (or removing amplifiers) or a different antenna. I would also give it a shot (since you're using mplayer to test) to use mplayer to control the whole scenario (tune, stream-on, demux, decode and display). Try the following command:

mplayer dvb://1@TV6

Using the TV6 channel will avoid any obstacles by the channel name containing extended-ascii (Ö) and space ... TV6 should be an unencrypted channel and on the same MUX as TV4, even in the Öresund region ;)

// J

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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)

Your tips, with "mplayer dvb://1@TV6", produce:
<!-- code begin -->
MPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4000+ (Family: 15, Model:
107, Ste
CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE SSE2
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing dvb://0@TV6.
The username option must be >= 1: 0
Struct dvbin, field username parsing error: 0
dvb_tune Freq: 506000000
dvb_streaming_read, attempt N. 6 failed with errno 0 when reading 1484 bytes dvb_streaming_read, attempt N. 5 failed with errno 0 when reading 1108 bytes dvb_streaming_read, attempt N. 4 failed with errno 0 when reading 1108 bytes dvb_streaming_read, attempt N. 3 failed with errno 0 when reading 1108 bytes dvb_streaming_read, attempt N. 2 failed with errno 0 when reading 1108 bytes dvb_streaming_read, attempt N. 1 failed with errno 0 when reading 1108 bytes dvb_streaming_read, attempt N. 6 failed with errno 0 when reading 2048 bytes dvb_streaming_read, attempt N. 5 failed with errno 0 when reading 2048 bytes TS file format detected. (and here its freeze, until I terminate it)

MPlayer interrupted by signal 2 in module: demux_open <!--/ code end -->

I turned on some debug options on kernel-module "saa7134" . Eew, the line "modprobe saa7134 video_debug=1 ts_debug=1 i2c_debug=1 i2c_scan=1"

If I use i2c_scan=1, I get these lines as:

Feb 10 15:20:37 redeb kernel: saa7133[0]: i2c xfer: < 79 ERROR: NO_DEVICE
Feb 10 15:20:37 redeb kernel: saa7133[0]: i2c xfer: < 7b ERROR: NO_DEVICE
Feb 10 15:20:37 redeb kernel: saa7133[0]: i2c xfer: < 7d ERROR: NO_DEVICE
Feb 10 15:20:37 redeb kernel: saa7133[0]: i2c xfer: < 7f ERROR: NO_DEVICE

(there where many many more...

And when I zap, I get lines as:

Feb 10 15:21:56 redeb kernel: saa7133[0]/ts: buffer_activate 
[ffff810027793a00]<7>saa7133[0]/ts: - [top]     buf=ffff810027793a00 
next=ffff810027793800
Feb 10 15:21:56 redeb kernel: saa7133[0]/ts: buffer_activate 
[ffff810027793800]<7>saa7133[0]/ts: - [bottom]  buf=ffff810027793800 
next=ffff810027793600
Feb 10 15:21:56 redeb kernel: saa7133[0]/ts: buffer_activate 
[ffff810027793600]<7>saa7133[0]/ts: - [top]     buf=ffff810027793600 
next=ffff810027793400
Feb 10 15:21:56 redeb kernel: saa7133[0]/ts: buffer_activate 

[ffff810027793400]<7>saa7133[0]/ts: - [bottom] buf=ffff810027793400 next=ffff810027793200

my dmesg are messed up with debugging messages now.

Here are my fresh lsmod output:

Module Size Used by
saa7134_dvb 22412 0

saa7134               143956  1 saa7134_dvb
snd_hda_intel         311968  0
ipv6                  296840  16
button                 13472  0
ac                     10376  0
battery                15496  0
dm_snapshot            21704  0
dm_mirror              26240  0
dm_mod                 64112  2 dm_snapshot,dm_mirror
firewire_sbp2          18180  0
loop                   23044  0
tda827x                12036  1
dvb_pll                21124  1 saa7134_dvb
video_buf_dvb          11524  1 saa7134_dvb
dvb_core               89520  1 video_buf_dvb
tda1004x               19972  2 saa7134_dvb
firmware_class         15360  2 saa7134_dvb,tda1004x
tsdev                  13312  0
tuner                  66856  0
snd_pcm                89992  1 snd_hda_intel
pcspkr                  7680  0
serio_raw              11780  0
parport_pc             42664  0
video_buf              30980  3 saa7134_dvb,saa7134,video_buf_dvb
compat_ioctl32         13056  1 saa7134
ir_kbd_i2c             14352  1 saa7134
ir_common              41476  2 saa7134,ir_kbd_i2c
videodev               32512  1 saa7134
v4l2_common            24320  4 saa7134,tuner,compat_ioctl32,videodev
i2c_piix4              13836  0
parport                44428  1 parport_pc
v4l1_compat            16388  2 saa7134,videodev
snd_timer              28424  1 snd_pcm
psmouse                45468  0
i2c_core               31488  8 
saa7134_dvb,saa7134,tda827x,dvb_pll,tda1004x,tuner,ir_kbd_i2c,i2c_piix4
shpchp                 38428  0
pci_hotplug            37252  1 shpchp
snd                    65896  3 snd_hda_intel,snd_pcm,snd_timer
soundcore              13088  1 snd
snd_page_alloc         15376  2 snd_hda_intel,snd_pcm
k8temp                 10496  0
evdev                  15232  4
ext3                  137232  4
jbd                    68080  1 ext3
mbcache                13832  1 ext3
ide_disk               21888  0
ide_cd                 44832  0
cdrom                  39848  1 ide_cd
generic                10372  0 [permanent]
usb_storage            90432  0
sd_mod                 33280  6
atiixp                 10640  0 [permanent]
ide_core              147728  5 ide_disk,ide_cd,generic,usb_storage,atiixp
floppy                 67560  0
firewire_ohci          22784  0
firewire_core          49728  2 firewire_sbp2,firewire_ohci
crc_itu_t               6656  1 firewire_core
ahci                   28804  5
ata_generic            13188  0
libata                132528  2 ahci,ata_generic
scsi_mod              164536  4 firewire_sbp2,usb_storage,sd_mod,libata
ehci_hcd               37900  0
ohci_hcd               25860  0
r8169                  36488  0
thermal                19600  0
processor              39912  1 thermal
fan                     9992  0

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Hi,

Am Sonntag, den 10.02.2008, 15:28 +0100 schrieb Per Blomqvist:

you should prefer dvb-apps from mercurial, but that is not so important.

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.

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)

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.

If still not, we install the recent v4l-dvb, remove all old modules and might try to debug from there.

Cheers,
Hermann

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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??

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 is a deb-package called "mercurial".
(I suspect it doesnt have anything, todo with this, no?)

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..

Yes, now my system is relatively fresh, again (I dont load any kernel-module with any extra options).

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..

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

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Hi!

Am Sonntag, den 10.02.2008, 23:37 +0100 schrieb Per Blomqvist:

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.

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

http://www.linuxtv.org/repo

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

Thanks. It is the known card with LNA.

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

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".

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)

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

Cheers,
Hermann

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