[vlc] Re: DVB?

[Jean-Paul Saman]

Jan Ekholm wrote:
> Hi there,
> 
> Has anyone recently managed to get DVB stuff working with 0.7.1? I've been
> fighting with Videolan and DVB for a few weeks now (no kidding) without a
> single successful tuning. At first I tried vls, but it is clearly an
> unmaintained dead end, and it was suggested on IRC that vlc is the way to
> go now.
> 
> I've tried a lot to get the tuning to work, but can't seem to get a
> frontend lock and/or a successful tuning. I've tried according to these
> docs:
> 
> 	http://www.linux.com/howtos/VideoLAN-HOWTO/x818.shtml
> 
> I use a Hauppauge Nexus full featured DVB-s card, and it works just fine
> with other apps such as xawtv and dvbstream. I've tried to do things like:
> 
> 	% vlc -vvvv dvb:1212551000:1:9:22000000

You need linuxtv-1.0.x drivers on Linux 2.4.x kernels or a Linux 2.6.x 
kernel for this to work. The dvb access input uses v4l2 API.

Could you use the other syntax:

vlc -vvvv dvb:frequency=1254996200:polarization=h:fec=9:srate=22000000

(also :program=xx is supported).

> 
> The result is this:
> 
> 	http://www.infa.abo.fi/~chakie/media/vlc.log
> 

Could you try a vlc -vvv dvb:12551000:1:9:22000000 --probe ?
It probes the frontend for the right values.

> Clearly it finds the frontend and even finds a signal, but doesn't seem to
> get a lock?

Why is the question? I find that strange could you do the same test with 
a restarted computer, without tuning with dvbstream first? And send me 
the log (or provide a link to it).

> A strace from the same execution is here:
> 
> 	http://www.infa.abo.fi/~chakie/media/vlc.strace
> 

Confirms the fact that there is no lock. Usually it means wrong values 
have been provided for tuning or the default values for lnb-lof1, 
lnb-lof2 and lnb-slof are wrong.

> What could be missing and/or wrong? Clearly a project as old, mature and
> famous as Videolan should be easier to get up and running that this?
> 
> 
> When I use dvbstream for the same channel I get what I want:
> 
> % dvbstream -f 12551 -p v -s 22000 -v 171 -a 172 -ps
> dvbstream v0.5 - (C) Dave Chapman 2001-2004
> Released under the GPL.
> Latest version available from http://www.linuxstb.org/
> Using DVB card "STV0299/TSA5059/SL1935 based"
> tuning DVB-S to L-Band:0, Pol:V Srate=22000000, 22kHz=off
> polling....
> Getting frontend event
> FE_STATUS:
> polling....
> Getting frontend event
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI
> FE_HAS_SYNC
> Event:  Frequency: 12549962

This is a different frequency then applied on tuning with VLC and on 
this dvbstream commandline.

>         SymbolRate: 22000000
>         FEC_inner:  5
> 
> Bit error rate: 15360
> Signal strength: 46720
> SNR: 54333
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_CARRIER
> Setting filter for PID 171
> Setting filter for PID 172
> Using 224.0.1.2:5004:2
> version=2
> Streaming 2 streams
> Audiostream: Layer: 2  BRate: 192 kb/s  Freq: 48.0 kHz
> Videostream: ASPECT: 4:3  Size = 480x576  FRate: 25 fps  BRate: 3.90
> Mbit/s
> 
> 
> Here I have to give the audio and video pids too, but it was said that vlc
> doesn't need those, nor is the --program parameter needed, it should just
> be able to figure out everything once the tuning works and the DVB meta
> data starts flowing.
> 
VLC needs to know the program at some point either supplied on the 
commandline or selected from an interface menu.

Even VLS needs the program, but it uses strings (e.g: like "VIVA") for 
tuning.

-- 
Kind greetings,

Jean-Paul Saman


-- 
This is the vlc mailing-list, see http://www.videolan.org/vlc/
To unsubscribe, please read http://www.videolan.org/support/lists.html
If you are in trouble, please contact <postmaster at videolan.org>