Problem with capture card

i have a SDI BlackMagic capture card.
i put a signal in the card. with the software to encode video there is no problem. i see my video signal.
but in vvvv the node video in don’t capture the signal and display ‘video no input’ like there is no source connected.

can you help me ?

for continue Moustikopat’s question:

however this card is a Direct Show one. It’s very strange.


does the VideoIn nodes “Driver” pin show the cards name?
where do you see the display “video no input”? does the card have several inputs which you can switch via the “Anaolg Video Input” pin?

"does the VideoIn nodes “Driver” pin show the cards name? "

"where do you see the display “video no input”? "
this message is generate by the card when there is no signal in input normaly but we are sure that there is a signal in input
i have test capture with Virtualdub and the blackMagic software

"does the card have several inputs which you can switch via the “Anaolg Video Input” pin? "
no it’s a SDI (digital) capture card only

puh. now this is really hard to guess then…so the capture card seems to have a connection to the videotexture…hmm.

if you have mediaplayer classic and the directshow sdk-tool graphedit…and capturing works with mediaplayerclassic…you could have a look at the capturegraph and compare it to the one generated by vvvv.

tell me if you need more detailed description for those steps. or if you are near frankfurt and could come by with your card…

I’ll try to see that…

thank you

there are more information on this link
Decklink Directshow SDK
maybe you can find some informations…

I think that the fastest solution for everyone would be to send the card to you. If it doesn’t cause more problem to you to spend time on this problem. But for One or two days we will try to fix it by our side…

the previous message come from me

How to connect remote Graph to vvvv? I wasn’t able to do that.
Otherwise I’ve obtain these graphs with mediaplayer classic:

{img src= width=250 height=200 desc=withBlackMagicDecklinkCardAndMediaPlayerClassic
align=center link= }
{img src= width=250 height=200 desc=withvvvvNoGraph?
align=center link= }

no graph with vvvv and webcam

uh. forgot to say: viewing Filestream with an Inspektor reveals another pin allowing you to expose the graph to the ROT. then you can connect to it from graphedit.

and i can only view the last of your images. adress seems to be wrong.

ok I’ll do that

so look at this…

It seem that there are bad filters.

what can be done?

hm. no. where do you see the bad filters? actually that all looks smooth to me. the output is very strange… the graph is connected and runs…sou…

in graphedit when you rightclick the decklink source. is there any property page? i was hoping the screenshot would show a more obvious problem…

when sending me the decklink i should be able to figure out the problem. would need an sdi-source though…where maybe msberger could come into play? i’ll ask him…

there is an AVI decompressor filter however Decklink card is an SDI uncompressed card. If you can see in the first screenshot this capture card normaly need deinterlace filter only.

It is possible that I missed something…

When I rightclik the decklink source there is his propertie page but it is very poor. Only one Scroll menu which normaly display the video format. Nothing very strange.

We don’t have our own SDI source.

test with SDI signal and decklink card

  • dont work - graphedit and vvvv : Decklink videocapture, SmartTee, AVI Decompressor, Color Space Converter, Video Mixing Renderer 9
  • work - graphedit and mediaplayerclassic : Decklink videocapture, SmartTee, Deinterlacer, Overlay mixer, Video Renderer
  • work - graphedit and VirtualDub : Capture Device, AVI Decompressor, Video Renderer

test with webcam and vvvv
work - Philips ToUcam Pro Camera;Video, SmartTee, AVI decompressor, Video Mixing Renderer 9

in the dont work case above do you also get the denklink novideo image or just a black image?

the only node capable of generating that nice Decklink image i ee is the Decklink videocapture node - so the graph is up and running something in this node not set up properly? are there any additional control panels with that card? perhaps these can set some system wide default behaviour, like default input, ntsc/pal variants to use etc. ?

do the blackmagic forums say anything concerning the conditions where the no-video show up?

yes, we also get the decklink no video image when it doesn’t work.

we have tried every adjustments in the control panel Pal, NTSC, 8 bits, 10 bits… something is blocked because these adjustement doesn’t take effect with vvvv. It’s like the picture was freeze at start.

An other thing interesting is that when we plug a webcam we have the two device listed in the device pin of “video in” node but when we choice webcam it works and when we want to choice the Decklink device back this one is selected but in the video pin we have webcam video again…

I didn’t find BlackMagic forum

Do you think Cheater Node or Dscaler Node can help?

no. cheater and dscaler won’t help here.

but before sending the card another test:

mediaplayer classic (mpc) allows you to choose a renderer used for display. go to VIEW/OPTIONS/PLAYBACK/OUTPUT and select: VMR9 (renderless). additionally select the radiobox: “Use texture surfaces and render video in 3D”.

VMR9 (renderless) is used for vvvvs videotexture node. VMR9 (windowed) is used for the videoout node. try both in mpc and see if they behave different.

  • didn’t find any useful information in the declink sdk. they are writing about the “noinput” image but only say that it appears when there is no valid input connected.
  • which input do you have connected when you say you don’t have your own SDI source?
  • which deinterlacer are you using in your screenshot above?

there seems to be a forum:

and another maybe related story:

still strange that it works with other soft though…
waiting for your results with the vmr9 settings in mpc

We have tried friday at a company who rent audiovisual devices (SDI so).
But these days we just made a loop with BNC cable. We can see that picture flicked.

I’ll do these new tests this night.