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Output not initialized on startup - vMix restart is required to initalize output correcltly
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jet  
#1 Posted : Monday, October 13, 2025 5:56:00 AM(UTC)
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Just installed the new vMix 29.0.0.31 Beta and the latest BMD drivers (Desktop Video 15.1) and noticed the behaviour described in the topic subject.

The output (and input) card is BMD Micro (M.2).

This issue is repeatable.

My guess is that vMix gives not enough time to the I/O card to be initalized correctly before it goes ahead with other things.
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admin  
#2 Posted : Monday, October 13, 2025 12:01:58 PM(UTC)
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Hi,

Moved this to Hardware Compatibility as we cannot replicate this and Decklink API behavior has not changed in vMix 29.
My guess is some kind of issue with that particular device or system.

Regards,

Martin
vMix
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jet  
#3 Posted : Monday, October 13, 2025 5:33:02 PM(UTC)
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The weird thing is that when vMix quitted 1st time then the Output IS Awakened / initialized on exit.
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jet  
#4 Posted : Tuesday, October 14, 2025 8:10:28 PM(UTC)
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Really, really weird. Today vMix output worked right away, without the need to quit and re-run vMix.. (I did not yet update to the latest beta).
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jet  
#5 Posted : Tuesday, October 14, 2025 8:42:12 PM(UTC)
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Stopped working again.

Found this on the net:
https://weareatomic.com/lab/sdi-level-a-b/

Now changed the M.2 card to use SDI Level A and it seems to work more reliable.
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jet  
#6 Posted : Tuesday, October 14, 2025 9:48:10 PM(UTC)
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Now Output seems to work great with SDI Level A and latest vMix 29.0.0.32 Beta
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