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Will Decklink HD downconvert 720P files?

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Herb Sevush
Will Decklink HD downconvert 720P files?
on Jul 15, 2009 at 10:12:28 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


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Joachim Blunck
Re: Will Decklink HD downconvert 720P files?
on Aug 8, 2009 at 6:21:01 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?




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Herb Sevush
Re: Will Decklink HD downconvert 720P files?
on Aug 8, 2009 at 12:48:09 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


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Joachim Blunck
Re: Will Decklink HD downconvert 720P files?
on Aug 8, 2009 at 2:39:34 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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