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

Matt Holgate matt-bulk-linux-dvb at holgate.org.uk
Thu Aug 18 12:07:12 CEST 2005


On Tue, 16 Aug 2005, Matt Holgate wrote:

> On Tue, 16 Aug 2005, Patrick Boettcher wrote:
>
>> No, unfortunately my suspicion was wrong. I added some debugging, but 
>> didn't found the error yet. It seems to be a hard one.

A few interesting things I've found. I don't know if these are red 
herrings but:

1) when running tzap under high load, I never see the problem. For 
example, if I do:

perl -e 'while (1){}' in one console

and then run tzap 'niced' in another console, I always seem to get a 
perfect stream. So I'm wondering if it's a timing issue or something.

2) I'm not sure if this is obvious/expected behaviour (or if I understand 
it properly), but whether or not the stream is corrupt or not seems to 
depend on the *first* demux that has been setup.

  - If I do tzap then dvbstream | mplayer, then I quit mplayer and re-run 
it, it will either fail every time or succeed every time.

  - If I do tzap -F (to prevent the demux setup in tzap), quitting and 
restarting dvbstream/mplayer results in different results each time 
(sometimes corrupt, sometimes fine).

This makes me thing it has something to do with the first time a demux is 
setup after setting up the frontend.

I don't know if this is of any help, or if it is all coincidental 
effects...

thanks,
Matt.




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