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    Blackmagic Video Input no image

    Troubleshooting and Bug Reports
    troubleshooting
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    • R
      RL last edited by

      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

      MacBook Pro 2017
      OSX 10.14.6

      mark_m jfg 2 Replies Last reply Reply Quote 0
      • mark_m
        mark_m @RL last edited by

        @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?

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        R 1 Reply Last reply Reply Quote 0
        • jfg
          jfg @RL last edited by

          @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 

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          mark_m R 2 Replies Last reply Reply Quote 0
          • mark_m
            mark_m @jfg last edited by

            @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!!

            Intel NUC8i7HVK Hades Canyon VR Gaming NUC, i7-8809G w/ Radeon RX Vega M GH 4GB Graphics, 32GB RAM, 2 x NVMe SSD
            Gigabyte Aero 15 OLED XD. Intel Core i7-11800H, NVidia RTX3070, 32GB RAM 2 x NVMe SSD
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            • R
              RL @jfg last edited by

              @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. 

              MacBook Pro 2017
              OSX 10.14.6

              1 Reply Last reply Reply Quote 0
              • R
                RL @mark_m last edited by

                @mark_m 

                Hi Marc,

                hope Mobil-Pictures are ok. Was easier :)

                MacBook Pro 2017
                OSX 10.14.6

                mark_m 1 Reply Last reply Reply Quote 0
                • mark_m
                  mark_m @RL last edited by mark_m

                  @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 :-(

                  Intel NUC8i7HVK Hades Canyon VR Gaming NUC, i7-8809G w/ Radeon RX Vega M GH 4GB Graphics, 32GB RAM, 2 x NVMe SSD
                  Gigabyte Aero 15 OLED XD. Intel Core i7-11800H, NVidia RTX3070, 32GB RAM 2 x NVMe SSD
                  PC Specialist Desktop: i9-14900K, RTX4070Ti, 64GB RAM, Win11Pro
                  www.natalieinsideout.com

                  R 1 Reply Last reply Reply Quote 0
                  • R
                    RL @mark_m last edited by

                    @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.

                    MacBook Pro 2017
                    OSX 10.14.6

                    DusX 1 Reply Last reply Reply Quote 0
                    • DusX
                      DusX Tech Staff @RL last edited by

                      @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.

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                      R 1 Reply Last reply Reply Quote 0
                      • R
                        RL @DusX last edited by

                        @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.

                        MacBook Pro 2017
                        OSX 10.14.6

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