can't see capture from Decklink

[ancientmember]

can anyone tell me why i can't see feeds from Decklink SDI card? i'm using the latest ubuntu and this is what i input

manager@ubuntu:~$ cvlc dshow:// :dshow-vdev="decklink video capture" :dshow-adev="none" :decklink-caching=1000 :dshow-caching=1000 :decklink-mode=ntsc :dshow-chroma=UYVY :dshow-fps=25 :dshow-aspect-ratio=16:9

this is what i got:

VLC media player 1.1.12 The Luggage (revision exported)
Blocked: call to unsetenv("DBUS_ACTIVATION_ADDRESS")
Blocked: call to unsetenv("DBUS_ACTIVATION_BUS_TYPE")
[0x9c6220] dummy interface: using the dummy interface module...
[0x9bef30] main input error: open of `dshow://' failed: (null)
[0x9bef30] main input error: Your input can't be opened
[0x9bef30] main input error: VLC is unable to open the MRL 'dshow://'. Check the log for details.

[Rémi Denis-Courmont]

DirectShow is never going to work on Linux, that's a given.

[ancientmember]

so what should be correct command? thank you