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

CityK CityK at rogers.com
Fri Feb 8 16:45:41 CET 2008


Per Blomqvist wrote:
> I just signed up for this mailing-list ( I hope this is the right 
> forum.. 
>   

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

> 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..
>   

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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