Dear linuxtv developer-s
I am trying (it is now couple of days - of no avail) to create interface
with dvbnet utility for decoding IP with MPE (tested with DVB-H signal
containing IP packets). I run:
dvbnet -a 0 -p 1002
gives me this output:
Error: couldn't open device 0: 2 No such file or directory
But the char device /dev/dvb/adapter0/net0 is definitely there (in it's
default location).
For some reason dvbnet_open function in dvb-apps/lib/libdvbapi/dvbnet.c
cannot open this device
I have search mailing(and intenet) list but I haven't found any issue
similar to this.
Specs:
I have embedded linux set-top Skytec JOBI box which has sh4 architecture
and 2.6.32.28_stm24_0207 kernel. It is this device:
http://www.satmultimedia.tv/skytec-hd-jobi
as Os i have installed enigma2 linux.
I thought that maybe there isn't kernel support for MPE, but why should
there be net0 device which was created by driver..
My attempts:
After no success with debian .deb packege of dvb-apps for sh4
(installed with ipkg ),
I cross-compiled dvb-apps staticaly(from mercurial repository).
Eeverything works: szap, scan.. dvbsnoop. I can tune to signal, zap
channels, sniff traffic with dvbtraffic, but dvbnet is giving me that
"no such file.." error.
I have other machine which is running debian and is receiving same
signal as is STB and I successfuly received IP from MPE (tested with
tcpdump) on that other machine with no problem.
I noticed that in /sys/class/dvb/ there is no dvb0.net0 folder (but i am
not exactly sure what is /sys/class/dvb folder used for).
Another wierd thing is that when I run dvbnet -h it segfaults and when I
run /usr/bin/dvbnet -h it works (its definitely the same binary - with
my debug messages).
Questions:
Can You please tell me why dvbnet cannot open this net0 device - or what
should I do to find out?
Maybe it is used by some process, but i killed TV interface enigma2
before trying anything(init 3, init 4 - it is not longer displayed in ps).
And can You please tell me how to detect if my kernel/driver has MPE
support (there is no /proc/kallsyms file on STB) - maybe some C code.
Finaly I was trying to find some info about MPE but there seem to be
very little on internet.
I would be grateful for any informations or links..
All the best
Ondrej Topolsky
Programmer at Maindata inc. Slovakia
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