Decklink DUO a/v out of sync during preview

Do you have questions about Desktop Video, Converters, Routers and Monitoring?
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dbozza

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  • Joined: Wed Aug 29, 2012 4:29 pm

Decklink DUO a/v out of sync during preview

PostWed Aug 29, 2012 4:48 pm

Hello,
I developed a simple directshow graph:

Decklink video capture(1) (1080i50) -> Avi decompressor -> video Render
Decklink audio capture(1) (2 ch) -> Default directsound device (clock)

My source is a video camera that outputs SDI signal with audio + video embedded.

Sometimes audio and video get out of sync into my preview graph.
CPU load is very low.

If I restart graph, audio and video become in sync.

Could it be because my decklink doesn't have a reference input?
Must source and decklink be syncronized with a reference input?

Thanks.
Davide
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Joshua Helling

Blackmagic Design

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  • Joined: Wed Aug 22, 2012 4:58 pm

Re: Decklink DUO a/v out of sync during preview

PostWed Aug 29, 2012 5:24 pm

I'd recommend posting this to our Developer's list as this is more of that type of issue.

You can sign up here:
http://lists.blackmagicdesign.com/mailm ... -developer
Joshua Helling

Director of World Wide Support
Blackmagic Design Inc.

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