The VideoLAN Forums

Posted: **10 Jul 2009 01:24**

Hi all,

I installed VLC 1.0.0 to watch TV with my ASUS "My Cinema U3000 Mini" DVB-T USB-Stick: but I cannot open the device.
The error I get in the log is:

main error: open of `dvb-t://frequency=482000000' failed: (null)

It looks like VLC didn't recognize the device.

However, it actually works with the original Software from Asus and -I am quite certain about that- it used to work with an old version of VLC (could have been 0.9.1 ...). Well, as I've regulary updated and haven't tried for a while I can't tell exactly since which version it woudn't work any more.

Does anyone have an idea how to make it run again with VLC?

Thanks,
Tom

Posted: **10 Jul 2009 12:11**

Give more messages.

Posted: **10 Jul 2009 20:34**

Make sure you have installed the correct BDA drivers for your device.

Posted: **11 Jul 2009 13:24**

Basically I get (only) two messages:

dshow error: no video capture device was detected
main error: open of `dvb-t://frequency=482000000' failed: (null)

So I guess it's more likely to be driver related.

Well, I tried two drivers/packages from Asus: Package 3.0.0.1 and 3.2.1.1.

both versions use "BdaSup.sys" 5.3.2600.5512;
the differnce is obvisoulsy with the device driver: package 3.0.0.1 installs device driver "u3kmini.sys" 3.0.0.1 and
package 3.2.1.1 installs "u3kmini.sys" 3.2.1.1

"dshow error: no video capture device was detected" suggests a BDA issue(?), but how can I adress it??

Thanks for any hints!

...

EDIT:
I just tried a tool called "ScanChannelBDA_UK.exe", which I found in a different post -> "viewtopic.php?f=14&t=61758&p=206707&hilit=bda#p206662" and it worked fine.
It looks like it was able to find the device through BDA...

The log file says:

-----------------------
ScanChannelsBDA starting
Sat Jul 11 12:55:34 2009

Build - v2.6.0.0
Checking for new BDA DVB-T Cards
Tuner - ASUS U3000 Mini BDA Digital Tuner (Dev1 Path0)
@device:pnp:\\?\usb#vid_0b05&pid_171f#6b01704805#{71985f48-1ca1-11d3-9cc8-00c04f7971e0}
Finding Demod and Capture filters
Trying - BDA Slip De-Framer
@device:pnp:\\?\root#system#0000#{fd0a5af4-b41d-11d2-9c95-00c04f7971e0}\{03884cb6-e89a-4deb-b69e-8dc621686e6a}&global
Trying - BDA MPE-Filter
@device:pnp:\\?\root#system#0000#{fd0a5af4-b41d-11d2-9c95-00c04f7971e0}\{8e60217d-a2ee-47f8-b0c5-0f44c55f66dc}&global
Trying - ASUS U3000 Mini BDA Digital Capture (Dev1 Path0)
@device:pnp:\\?\usb#vid_0b05&pid_171f#6b01704805#{fd0a5af4-b41d-11d2-9c95-00c04f7971e0}\asus u3000 mini bda digital capture (dev1 path0)
SUCCESS
Checking for Capture filter
Trying - BDA Slip De-Framer
@device:pnp:\\?\root#system#0000#{fd0a5af4-b41d-11d2-9c95-00c04f7971e0}\{03884cb6-e89a-4deb-b69e-8dc621686e6a}&global
Trying - BDA MPE-Filter
@device:pnp:\\?\root#system#0000#{fd0a5af4-b41d-11d2-9c95-00c04f7971e0}\{8e60217d-a2ee-47f8-b0c5-0f44c55f66dc}&global
Finished Finding Demod and Capture filters
Capture - ASUS U3000 Mini BDA Digital Capture (Dev1 Path0)
@device:pnp:\\?\usb#vid_0b05&pid_171f#6b01704805#{fd0a5af4-b41d-11d2-9c95-00c04f7971e0}\asus u3000 mini bda digital capture (dev1 path0)
Finished Checking for new BDA DVB-T Cards

Any clues?

Posted: **11 Jul 2009 20:51**

The error I get in the log is:
main error: open of `dvb-t://frequency=482000000' failed: (null)

Make sure the frequency is valid and working. ScanChannelBDA can help you to find on air frequencies.

You also need to specify the channel bandwidth:
dvbt:// :dvb-frequency=482000000 :dvb-bandwidth=8

Posted: **11 Jul 2009 22:49**

I verified the settings according to the ScanChannelsBDA.log (Transponder Freq. = 482000 kHz and Bandwidth = 8 MHz) - still same result.

However, I think the main issue relates to the other error, which I understand means the device cannot be detected in first place:

dshow error: no video capture device was detected

Any more ideas, please?

Posted: **14 Jul 2009 00:04**

Just double-checked on vlc debug-messages:

qt4 debug: Initialization of Capture device panel
dshow error: no video capture device was detected
qt4 warning: Input option: dvb-bandwidth=8
main debug: adding item `dvb-t://frequency=482000000' ( dvb-t://frequency=482000000 )
main debug: rebuilding array of current - root Playlist
main debug: rebuild done - 2 items, index 0
main debug: processing request item dvb-t://frequency=482000000 node Playlist skip 0
main debug: resyncing on dvb-t://frequency=482000000
main debug: dvb-t://frequency=482000000 is at 1
main debug: starting new item
main debug: creating new input thread
main debug: Creating an input for 'dvb-t://frequency=482000000'
main debug: thread (input) created at priority 1 (../.././src/input/input.c:230)
qt4 debug: Adding a new MRL to recent ones: dvb-t://frequency=482000000
main debug: thread started
main debug: using timeshift granularity of 50 MBytes
main debug: using timeshift path 'C:\[...]\Temp'
main debug: `dvb-t://frequency=482000000' gives access `dvb-t' demux `' path `frequency=482000000'
main debug: creating demux: access='dvb-t' demux='' path='frequency=482000000'
main debug: looking for access_demux module: 0 candidates
main debug: no access_demux module matched "dvb-t"
main debug: TIMER module_need() : 0.341 ms - Total 0.341 ms / 1 intvls (Avg 0.341 ms)
main debug: creating access 'dvb-t' path='frequency=482000000'
main debug: looking for access module: 1 candidate
bda warning: CreateTuneRequest: Cannot find a suitable System Tuning Space: hr=0x80004005
bda warning: SubmitDVBTTuneRequest: Cannot create Tune Request: hr=0x80004005
bda warning: DVB_Open: Unsupported Network dvb-t
main warning: no access module matching "dvb-t" could be loaded
main debug: TIMER module_need() : 8.330 ms - Total 8.330 ms / 1 intvls (Avg 8.330 ms)
main error: open of `dvb-t://frequency=482000000' failed: (null)
main debug: finished input
main debug: dead input
main debug: thread ended
main debug: thread times: real 0m0.031250s, kernel 0m0.000000s, user 0m0.000000s
main debug: TIMER input launching for 'dvb-t://frequency=482000000' : 39.275 ms - Total 39.275 ms / 1 intvls (Avg 39.275 ms)
main debug: changing item without a request (current 1/2)
main debug: nothing to play

How does VLC recognize BDA-driver-devices?

Posted: **14 Jul 2009 08:28**

Code: Select all
bda warning: CreateTuneRequest: Cannot find a suitable System Tuning Space: hr=0x80004005 bda warning: SubmitDVBTTuneRequest: Cannot create Tune Request: hr=0x80004005 bda warning: DVB_Open: Unsupported Network dvb-t

I think here is our problem.
Seems to be quite the same as in this thread:
viewtopic.php?f=14&t=61758

So the BDA drivers need a DVB-T tuning space. But by default in XP (I'm not sure about Vista because I trashed Vista forever months ago) there is no DVB tuning space at all.

Some applications are internally dealing with the tuning space (e.g. DVBViewer), some other ones are creating the required keys in the registry during the first device initialisation (e.g. ProgDVB).
Looks like VLC is doing none of these and expects the tuning space keys to be already present.

So I'm not sure about the right way to deal with this. Let's hope KenS will read this and will find a solution soon.

Posted: **14 Jul 2009 16:00**

Thanks "Lotesdelere",
this makes perfect sense to me. Having a look at the msdn I found this:

... there are no default DVB tuning spaces, because many of the required parameters are specific to individual broadcasters. In order to support DVB tuning, therefore, you must create a new tuning space and add it to the system registry ...

http://msdn.microsoft.com/en-us/library ... S.85).aspx

However, I still wonder how

dshow error: no video capture device was detected

relates to the missing tuning space. It might be the root-cause for it???

Well, "Let's hope KenS will read this and will find a solution soon".

... any hints appreciated!

Posted: **15 Jul 2009 09:20**

Only hint I can give you is to use another program first to create the tuning space keys in the registry.

IIRC the very first DVB app I've used, because I didn't want to install the big suite that came bundled with my device, is DigitalWatch from the same author as ScanChannelsBDA. It's light and open source. I've been lucky since I knew nothing about DVB but it gave me my very first DVB reception and images. So I believe this is the one which created the DVB tuning space keys.
Select your device and it will initialize it. Then perform a scan and tuning. Check some channels and if it works then close DigitalWatch and try again with VLC. Don't forget that you MUST specifiy a channel bandwidth value in VLC. Good luck

Posted: **08 Sep 2009 09:18**

hello
I think you should re-install it . Or check your device is it ok or not

Posted: **09 Sep 2009 14:54**

There is a feature to select and create System Tuning Spaces if for some reason they have disappeared from your registry or if you just want an alternative with different default values - this is mainly of use for those using DVB-S to handle the many permutations of LNBs, DISEQc switches, multiple cards etc...

dvb-name=XXXX selects a specific tuning space
dvb-create causes the name in dvb-name to be created as a new system tuning space if it does not yet exist. Relevant parameters from the command line are transferred to the new system tuning space.

So if you have installed your BDA drivers but they did not create a system tuning space - try that

Also, in your command line its safer to use dvb-frequency= not just frequency=

Posted: **01 May 2013 03:46**

And how can I do it in Windows without command line? I want watch DVB-C with vlc. But it can not create a tuning space. Please help me

Posted: **05 May 2013 15:20**

You can do it in preferences too.

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