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Audio Sync Issues with Black Magic Decklink Studio

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Philip Barbour
Audio Sync Issues with Black Magic Decklink Studio
on Aug 7, 2012 at 2:11:02 pm

I am having all sorts of audio sync problems. I am using a Broadcast Pix Granite 1000 Video Switcher

along with an Mackie Onyx audio board, and a Black Magic Decklink Studio 2 for video streaming. I'm using Adobe Flash Media Live Encoder along with Internap (CDN) to host my live video stream. From the Broadcast Pix to the Black Magic card, the sync looks fine. But when I do a test stream to Internap, the audio is anywhere from 1 second to 8 seconds ahead of the video. I do the test by watching the live stream from Internap on another computer. I added in a Rane AD22S Audio Delay unit, but I'm still getting these same, long delays.

I've been told by the Broadcast Pix people that a delay of more than a second sounds unusual. But I can't for the life of me figure out where the problem is. Any ideas??

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