The VideoLAN Forums

Try to use other video codec (vcodec=mp4v will be fine), or try to specify video encoder. See viewtopic.php?f=4&t=50049

Use only v4l-xxxx not v4l2-xxxx after v4l2:// - that works for me. Here is my example : vlc -vvv --color v4l2:// --v4l-vdev="/dev/video0" :v4l-norm=3 :v4l-frequency=-1 :adev=/dev/dsp1:audio=0 .................. I see that You try to use ogg vorbix mux, but I am afraid that this not work fo...

Try to add modulation parameters:
--dvb-modulation=128
Here is my working example:
vlc -vvv --color --ts-es-id-pid --program=1 dvb: --dvb-frequency=806000000 --dvb-srate=6875000 --dvb-modulation=64
Are Your DVB card working with other programs l.ike xine, mplayer or kaffeine?

You can see http://linuxtv.org/wiki/index.php/Main_Page for supported from linux kernel dvb cards. If Your card is listed, the vlc will work.

If Your have DVB card, the answer is YES, but all channels must be on same transponder.

I thing that problem is with audiocodec. I will try to help, but I need more info about IPTV operator and Your linux distro. Is Your vlc compiled from source or You are using distro repository?