Skip to main content
engineerfranko
engineerfranko
Participating Frequently
April 2, 2024
Question

Dropped Frames - Blackmagic IO

  • April 2, 2024
  • 10 replies
  • 1104 views

Since v22 of Premiere we have noticed that playback at 50p using Blackmagic results in dropped frames.

 

I have tested with all latest versions v23, v24 and including the Betas and reported to Adobe via their customer support but thought I should throw it in here as well as we have an upcoming project broadcast project where we must have the playback working. 

 

Couple of things to note:

1. The issue is not the IO device itself (tested with Ultrastudio 4K Extreme and Ultrastudio Monitor)

2. Only appears to affect 50p and not 25p or 50i.

3. It is not codec specific, same problem is in any codec

4. Rendering sequence, still playback issues

5. Tested with multiple versions of Desktop Video and firmware of devices.

6. Same files tested in BM Video Express, playback absolutely fine.

7. Machine itself is extremely high performance (2 CPU, 16 cores, 128GB RAM)

 

Our client has requested Premiere on the job so we can't ask them to use Avid. So a resolution is rather urgent even if it's beta.

    This topic has been closed for replies.

    10 replies

    Kevin-Monahan
    Community Manager
    Kevin-MonahanCommunity Manager
    Community Manager
    June 18, 2024

    Hello @engineerfranko,

    The product team has reached out and is helping you with the issue. Please let us know if you need further assistance or want to keep the report open.

     

    Thanks,
    Kevin

    Kevin Monahan - Sr. Community & Engagement Strategist – Pro Video and Audio
    R
    Community Expert
    Richard M KnightCommunity Expert
    Community Expert
    June 18, 2024

    I've had this issue and I have just installed the latest BM desktop video driver

     

    Makes no difference still dropping frames when using transmit.

     

    Win 11

    i9 9900K

    64GB ram

    BM Ultra Studio Mini 4K

    Bruce Bullis
    Community Manager
    Bruce BullisCommunity Manager
    Community Manager
    April 2, 2024

    That IS super interesting! 

    [I'll reach out directly, with contact info]

      engineerfranko
      engineerfrankoAuthor
      Participating Frequently
      April 2, 2024

      OK, get ready for a whole load of weird on this one Bruce:

      So, I open the project. The project is R709. I have media in two colourspaces: REC709 and REC2100.

       

      Anything that is R709 plays with dropped frames: UNLESS - If I load a clip that is REC2100 into the Source Window, as if by magic we get a consistent 50fps playback. The software is then fine until quitting.

       

      I have a screen capture showing it but due to security I won't be able to upload it here. Would you be able to email me on my account and I can send you the file for you to see?

        Bruce Bullis
        Community Manager
        Bruce BullisCommunity Manager
        Community Manager
        April 2, 2024

        >...so it would appear the problem lies in the sending of data to the BM.

         

        That doesn't necessarily follow; the problem could just as easily be in the plugin's handling of the data being sent. We'll have a look!

          engineerfranko
          engineerfrankoAuthor
          Participating Frequently
          April 2, 2024

            engineerfranko
            engineerfrankoAuthor
            Participating Frequently
            April 2, 2024

            So far as I can see, it appears the only issue.

             

            I also saw the same problem with a TB connected Ultrastudio Monitor 3G so it would appear the problem lies in the sending of data to the BM.

             

            I saw the dropped frames in the Dog Ears mode as well (love a diagnostic screen)

              Bruce Bullis
              Community Manager
              Bruce BullisCommunity Manager
              Community Manager
              April 2, 2024

              Ahh, the rebranded "Avid" Blackmagic device! Good details, thanks.


              Also confirming: Only 50p has problems?

                engineerfranko
                engineerfrankoAuthor
                Participating Frequently
                April 2, 2024

                Hi Bruce,

                 

                In the Transmit Settings

                Device: Artist DNxIQ

                Colour Gamut: Rec709

                No Output for unsupported frame sizes

                 

                Blackmagic Drivers 12.8.1 (also seen in 12.4, 12 and 11.5)

                 

                Drop frames are detected visually and the Premiere Pro output option 'Show Dropped Frame Indicator'

                 

                Turning off the Mercury Transmit, the playback is smooth but obviously only now visible in the GUI

                  Bruce Bullis
                  Community Manager
                  Bruce BullisCommunity Manager
                  Community Manager
                  April 2, 2024

                  The BlackMagic Transmit plugin controls transmit output, and does not support all output resolution possibilities. 

                  What settings within the Transmit plugin (PPro --> Preferences --> Playback --> little gear next to BlackMagic plugin) are you using, when you see the 50p failure?

                  What version of the BlackMagic drivers are you using? 

                  How are you detecting dropped frames; PPro's "dog ears"?

                    engineerfranko
                    engineerfrankoAuthor
                    Participating Frequently
                    April 2, 2024

                    I should note also,

                     

                    Deleting Caches didn't work

                    Turning off the Audio Hardware also didn't work.

                      Terms & ConditionsAccessibility statement
                      Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices