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BlackMagic Output losing Sync 14.1

Had an issue where our BlackMagic output to our MiniMonitor lost sync.

I submitted a ticket/log under the title "BlackMagic Output losing Sync 14.1"

Sync to local h.264 recording remained unaffected. I noticed in the logs I sent a large number of "late" frames compared to other sessions, which had zero.

[Jan 20 12:05:42] - #bmdout session --  drops: 0/99128813 a/v, late: 75853/586 a/v, drift: -3221603/0 min/max, resamp: 3221603

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    • CraigSModerator
    • Telestream Desktop Forum Moderator
    • CraigS
    • 1 yr ago
    • Reported - view
    Bryce Seifert said:
    I submitted a ticket/log under the title "BlackMagic Output losing Sync 14.1"

     Do you have a ticket number yet? I'll check on it.

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    • CraigS 00804919 

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      • CraigSModerator
      • Telestream Desktop Forum Moderator
      • CraigS
      • 1 yr ago
      • Reported - view

      Bryce Seifert Thanks for that. We fixed a few more Blackmagic out issues since the public beta.

      Have you done the MiniMonitor test requested here with ProRes and Media Express?
      We needed to hear back the results of that test to proceed if this is a related issue.

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  • Hi Guys,

    Just seen this as I was looking for topics that might have mentioned BMD and a difference in audio and video sync on output from Wirecast.

     

    I noticed when using a sync test video playing out from Wirecast to a BMD HD Mini the picture was slightly behind the audio.

    Playing the PGM audio from the PC and listening to the Recorder, it sounds like the audio is in sync but the video is behind by 3-6 frames.

    I did the test by playing this clip in Media Express and the video and audio are in sync.

     

    Using Wirecast 14.1.1.

     

    Cheers,

    Phil

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    • CraigSModerator
    • Telestream Desktop Forum Moderator
    • CraigS
    • 1 yr ago
    • Reported - view
    Philip Mead said:
    playing out from Wirecast to a BMD HD Mini the picture was slightly behind the audio.

     

    Philip Mead said:
    Playing the PGM audio from the PC and listening to the Recorder,

     This is a bit confusing. Are you going out using Mini Monitor or in using Mini Recorder?
    You always have sync offsets on input with the Recorder.

    You may want to update the BMD driver to 12.0 and reboot the computer as this driver works best in Wirecast 14.1.1

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