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  • Blackmagic Design

    Will Decklink HD downconvert 720P files?

    Posted by Herb Sevush on July 15, 2009 at 10:12 pm

    I have a Decklink HD on a Mac Pro. I’m cutting a 720P30 DVCPRO HD job on final cut. When I go into the control panel and set output to Downconvert to SD I get a flickering image, with interlaced fields flickering from letterbox to anamorphic. Can the Decklink HD downconvert in realtime?

    Thanks.

    Herb Sevush
    Zebra Productions

    Joachim Blunck replied 16 years, 9 months ago 2 Members · 3 Replies
  • 3 Replies

  • Joachim Blunck

    August 8, 2009 at 6:21 am

    I’m experiencing the same thing with a Decklink Extreme 2. I’ve seen one other instance of this problem in the threads, but no responses from the gurus.

    Please guys — what’s up?

  • Herb Sevush

    August 8, 2009 at 12:48 pm

    Joachim –

    I heard from the Black magic guys off line. The downconvert feature won’t work with a 30P timeline. Change your timeline settings to 720P60 and it works. The change doesn’t require any rendering or effect the material at all.

    Herb Sevush

    Herb Sevush
    Zebra Productions

  • Joachim Blunck

    August 8, 2009 at 2:39 pm

    Thanks.

    Timeline is set to 720p60 (there isn’t even a setting for 720p30). I also have a 720p ProRes timeline that does the same thing. They’re both 960 flavor 720 HD. I haven’t tried 1280 yet.

    Source material is irrelevant too — it can be from 720p30 or interlaced SD upconverted.

    But…

    If I change the video playback to 8 bit 1080i 29.97, it does the downconvert just fine.

    Weird.

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