[linux-dvb] typhoon usb dvb-t card low signal

Bertrand Marquis bertrand.marquis at gmail.com
Sun Mar 5 16:15:34 CET 2006


Le Dimanche 5 Mars 2006 16:04, Patrick Boettcher a écrit :
> On Sun, 5 Mar 2006, Bertrand Marquis wrote:
> > I have gone a little bit deeper using an usb sniffer under windows to be
> > able to compare what is done by the linux and the windows driver.
> >
> > It seems that the pid filters set by windows are a little bit different
> > which can result in less transfert under windows.
> > So here are the packets i have under windows:
> > - 05 : reset pid table
> > - 04 00 00 00
> > - 04 01 12 00
> > - 04 02 e0 00
> > - 04 03 e1 00
> > - 04 04 e2 00
> > - 04 06 e7 00
> >
> > and under linux:
> > - 04 00 31 01
> > - 04 01 32 01
> > - 04 02 00 00
> > and there is no reset of the pid table.
>
> the reset is not important. Only at channel change and there it is done.
>
> > Can someone explain if this can be the reason and how can i solve this ?
>
> in windows the application just receives more PIDs at the same time, don't
> know why.
>
> > Le Samedi 4 Mars 2006 12:08, Bertrand Marquis a écrit :
> >> Hi everyone,
> >>
> >> I'm still trying to make my  typhoon dvb-t usb box card work and i was
> >> wondering if that could help:
> >>
> >> The output of dvbtraffic with tzap running in one channel is:
> >> [bma at localhost ~]$ dvbtraffic
> >> 0000     3 p/s     0 kb/s     4 kbit
> >> 0131  1400 p/s   257 kb/s  2105 kbit
> >> 0132   103 p/s    18 kb/s   155 kbit
> >> 2000  1507 p/s   276 kb/s  2266 kbit
> >> -PID--FREQ-----BANDWIDTH-BANDWIDTH-
> >>
> >> Shouldn't i have more entries ?
>
> No. When you start tzap it only requests the pid for audio and video
> stored in your channels.conf.
>
> In fact this output looks very normal, that the bandwidth of the video is
> low, but as this is only a snapshot of dvbtraffic this can be normal.
>

the bandwith is always less than 2500kbit and is most of the time around 
900kbit, i think that could be one of the reason, but why is my bandwith so 
small.

Here is a more long output of dvbtraffic:
0000     0 p/s     0 kb/s     1 kbit
0131   336 p/s    61 kb/s   506 kbit
0132    74 p/s    13 kb/s   112 kbit
2000   412 p/s    75 kb/s   620 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     2 p/s     0 kb/s     3 kbit
0131  1523 p/s   279 kb/s  2291 kbit
0132    69 p/s    12 kb/s   104 kbit
2000  1595 p/s   292 kb/s  2399 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     1 p/s     0 kb/s     2 kbit
0131  1572 p/s   288 kb/s  2365 kbit
0132    57 p/s    10 kb/s    86 kbit
2000  1632 p/s   299 kb/s  2454 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     1 p/s     0 kb/s     2 kbit
0131   667 p/s   122 kb/s  1003 kbit
0132    51 p/s     9 kb/s    77 kbit
2000   721 p/s   132 kb/s  1084 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     0 p/s     0 kb/s     0 kbit
0131   498 p/s    91 kb/s   749 kbit
0132    42 p/s     7 kb/s    63 kbit
2000   541 p/s    99 kb/s   813 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     1 p/s     0 kb/s     2 kbit
0131   521 p/s    95 kb/s   784 kbit
0132    38 p/s     6 kb/s    58 kbit
2000   561 p/s   102 kb/s   844 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     0 p/s     0 kb/s     1 kbit
0131   622 p/s   114 kb/s   935 kbit
0132    51 p/s     9 kb/s    77 kbit
2000   674 p/s   123 kb/s  1014 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     1 p/s     0 kb/s     2 kbit
0131   530 p/s    97 kb/s   797 kbit
0132    41 p/s     7 kb/s    61 kbit
2000   573 p/s   105 kb/s   861 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     1 p/s     0 kb/s     2 kbit
0131   529 p/s    97 kb/s   796 kbit
0132    42 p/s     7 kb/s    63 kbit
2000   573 p/s   105 kb/s   862 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     1 p/s     0 kb/s     2 kbit
0131   360 p/s    66 kb/s   541 kbit
0132    68 p/s    12 kb/s   102 kbit
2000   429 p/s    78 kb/s   646 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     2 p/s     0 kb/s     3 kbit
0131   299 p/s    54 kb/s   449 kbit
0132    60 p/s    11 kb/s    91 kbit
2000   362 p/s    66 kb/s   544 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-
0000     2 p/s     0 kb/s     3 kbit
0131   841 p/s   154 kb/s  1265 kbit
0132    70 p/s    12 kb/s   106 kbit
2000   915 p/s   167 kb/s  1376 kbit
-PID--FREQ-----BANDWIDTH-BANDWIDTH-

Does anyone has an idea, i don't want to switch to windows every time i want 
to watch television.

Bertrand

> I really cannot explain why you cannot play the video.
>
> Did you try with storing it in a file and play it afterwards?
>
> regards,
> Patrick.
>
> --
>    Mail: patrick.boettcher at desy.de
>    WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/

	

	
		
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