Comment 8 for bug 240072

i asked the developer for help, he told me to use "qam" switch (not "quam") and frequencies in KHZ. the -a -v switches are for older dvb cards so just add the pids to the end of the command..

given this information dvbstream also works for me with dvb-c:

$ dvbstream -c 0 -qam 256 -f 330000 -s 6900 2011 2001
dvbstream v0.7 - (C) Dave Chapman 2001-2004
Released under the GPL.
Latest version available from http://www.linuxstb.org/
Tuning to 330000 Hz
Using DVB card "DRXK DVB-C DVB-T", freq=330000
tuning DVB-C to 330000000, srate=6900000
Getting frontend status
Event: Frequency: 330000000
        SymbolRate: 6900000
        FEC_inner: 9
Bit error rate: 0
Signal strength: 0
SNR: 370
UNC: 15898
FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC
dvbstream will stop after -1 seconds (71582788 minutes)
Using 224.0.1.2:5004:2
version=2
Streaming 3 streams

and then to watch it with mplayer:
mplayer -cache 8192 rtp://224.0.1.2:5004

many thanks to dave chapman!