[linux-dvb] Problem with Avermedia AverTV DVB-T USB2.0 (a800)

Patrick Boettcher patrick.boettcher at desy.de
Thu Aug 11 22:05:04 CEST 2005

On Thu, 11 Aug 2005, Johannes Stezenbach wrote:

> Matt Holgate wrote:
>> Patrick Boettcher wrote:
>>> run tzap -r "BBC One Scot" and let mplayer play /dev/dvb/adapter0/dvr0
>>> directly (you don't need dvbstream, when playing locally).
>>> When mplayer appears to have the blocky picture, try to run dvbscan -c,
>>> while tzap is still running.
>> OK, just tried this. Below is the output:
>> [when working]
>> matt at aragorn:~$ dvbscan -c
>> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>> 0x0000 0x107c: pmt_pid 0x107c BBC -- BBC ONE Scot (???)
> ...
>> [when not working]
>> matt at aragorn:~$ dvbscan -c
>> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>> WARNING: filter timeout pid 0x0011
> This is typical for bad signal. dvbscan -5c might give you valid output.

Not in this case. The signal is good as his tzap-output indicates.

>>> It if won't time out, but put out the channels of this frequency, than
>>> the problem is probably the software-demuxer (unlikely), otherwise it is
>>> a bug in the dvb-usb-framework...
> Why are you so sure that the device doesn't just output a broken stream?

Good point. I think it is something of both: the stream is somehow 
misaligned and the software demuxer (although fed via dvb_dmx_swfilter) 
looses alignment...

I have a suspicion, I hope I can fix it at the weekend.

best regards,

   Mail: patrick.boettcher at desy.de
   WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/

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