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what does presync in the video stream mean?

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davidkmiller
Posts: 57
Joined: 02 Oct 2013, 16:18

what does presync in the video stream mean?

Post by davidkmiller » 05 Feb 2014, 05:04

Having a strange issue where i will lose a video stream and the statistics show input in A:presync

manual says:
Presync, Syncing stabilizing stream, synchronizing multiple streams together

what does this mean and how do we restart a stream once its gone into Presync status?

Even better how do we prevent this from happening as it seems to be a common occurrence.

This is from a Black Magic Decklink 4 card
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Daniel Willer
Posts: 309
Joined: 06 Jan 2012, 18:12

Re: what does presync in the video stream mean?

Post by Daniel Willer » 06 May 2014, 10:27

Hi there

There are serveral reasons for a stream to be in presync status, it could be that the genlock signal is not fitting the input signal or that your configured input signal is not fitting the incoming signal. Another reason could be asynchrounous input signals with different frequenzies.
  • Check if you have the Synchronized flag checked in the config. If you have mixed freuquenzies you have to uncheck it.
  • Check if your genlock signal matches your input signal.
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