<![CDATA[Blackmagic Video Input no image]]>Hello,

I am trying to get a video input of a Blackmagic Deckling 8K Pro (on Win10). Settings are 3840x2160 25p.

I see the card in the input settings, but not getting any image. It stays black.

I checked in the MediaCapture Tool of Blackmagic and there the signal enters without issue. 

Are there any limitations in Isadora?

Thank you, rené

]]>https://community.troikatronix.com/topic/9176/blackmagic-video-input-no-imageRSS for NodeMon, 13 Apr 2026 18:52:01 GMTWed, 26 Mar 2025 09:45:10 GMT60<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 17:10:47 GMT]]>@dusx

good question. The Decklink Setup App doesn't give that option, but I will check as soon as I am back in my Studio (unfortunatelly not before friday).

However, I did check earlier my signal I wanted to capture and that leaves the device with 8bit.

]]>https://community.troikatronix.com/post/56076https://community.troikatronix.com/post/56076Wed, 26 Mar 2025 17:10:47 GMT<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 16:40:42 GMT]]>@rl said:

In Isadora WDM is only available unter Driver Windows legacy and Modern, but both give an error message.

 That's expected, since Blackmagic should interface via the Blackmagic driver.
I have look over this, and the only thing I can see is that the device supplies 12bit video, while Isadora uses 8bit internally. I don't know how conversion is handled in this case. I will need to check into that. Is there any way of configuring the device to use 8bit?

Unfortunately I don't have a pc tower, or decklink, so I can't dig in to testing this.

]]>https://community.troikatronix.com/post/56075https://community.troikatronix.com/post/56075Wed, 26 Mar 2025 16:40:42 GMT<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 16:24:08 GMT]]>@mark_m

I made a few more tests. I checked in other softwares, including Zoom. What I noticed: in MediaExpress the correct input is "Decklink 8k Pro #1" (no other choice). In Zoom and in another software "Decklink 8k Pro #1"  doesn't work, but I get a signal on "Blackmagic WDM Capture #1".


In Isadora WDM is only available unter Driver Windows legacy and Modern, but both give an error message.

]]>https://community.troikatronix.com/post/56074https://community.troikatronix.com/post/56074Wed, 26 Mar 2025 16:24:08 GMT<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 15:16:46 GMT]]>@rl

Thanks for posting the pictures.

All your settings look right.

I just compared them with mine. I only have an UltraStudio Recorder 3G so can only test in HD 1080 but the settings look the same in the Isadora Live Capture Settings, so I'm afraid I don't have any good ideas.

I notice that someone else posted problems with their Decklink on Windows.  @callie  did you ever get this working?

https://community.troikatronix...

Sorry I can't help more :-(

]]>https://community.troikatronix.com/post/56073https://community.troikatronix.com/post/56073Wed, 26 Mar 2025 15:16:46 GMT<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 13:39:04 GMT]]>@mark_m 

Hi Marc,

hope Mobil-Pictures are ok. Was easier :)

]]>https://community.troikatronix.com/post/56072https://community.troikatronix.com/post/56072Wed, 26 Mar 2025 13:39:04 GMT<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 13:31:39 GMT]]>@jfg 

Thanks. Not a stupid question, but I am aware of the issue. BM Express is closed. I only temporarly use it for a fast check to see if the connection works, because it's the easiest way to see the input. 

]]>https://community.troikatronix.com/post/56071https://community.troikatronix.com/post/56071Wed, 26 Mar 2025 13:31:39 GMT<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 12:29:39 GMT]]>@jfg said:

Sorry if my comment is too stupid, but do you have BM Express running at the same time as Isadora? If so, it won't work.

 That's a really good point! And I've been caught out with that before!!

]]>https://community.troikatronix.com/post/56070https://community.troikatronix.com/post/56070Wed, 26 Mar 2025 12:29:39 GMT<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 11:52:48 GMT]]>@rl

Sorry if my comment is too stupid, but do you have BM Express running at the same time as Isadora? If so, it won't work.

Best regards, 

Jean-François 

]]>https://community.troikatronix.com/post/56069https://community.troikatronix.com/post/56069Wed, 26 Mar 2025 11:52:48 GMT<![CDATA[Reply to Blackmagic Video Input no image on Wed, 26 Mar 2025 09:59:17 GMT]]>@rl

This should work.

Make sure the settings in Isadora are the same as in the Blackmagic Media Express app.

maybe post a screenshot of the Isadora live capture settings?

]]>https://community.troikatronix.com/post/56068https://community.troikatronix.com/post/56068Wed, 26 Mar 2025 09:59:17 GMT