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Multicorder/Main record very out of sync - out of sync records
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Minklemoo  
#1 Posted : Sunday, September 27, 2020 11:31:53 PM(UTC)
Minklemoo

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Most probably newbie errors, but as the title says my multicorder and main record are very out of sync.
I'm trying to work out why?

I've got 3x sources all vmix calls from webcams. (1280x720 30p avg 1500)
Audio sync is set to 0 in settings as mic is via webcam.
Each vmix call is set as master audio, and a bus channel. a, b, or c
Each vmix call is sent to an output 1-3 with its audio set to its bus channel. Again not changing any audio sync.
I multicorder outputs 1-3 as mp4 fault tolerant, single file, to an external ssd via usb c
The main record is a screen of all calls in boxes.
Again the record is set to mp4 and to the same ssd as above.
I've set my project and records as 30p, in vmix 23 running on a powerful HP Z8 G4 workstation

Each of my 4 records are very out of sync. Each seems to be different too. Sometimes 2 secs upto 20 secs.
Yet on the screen within vmix everything looks spot on in sync.

What am I doing wrong?
Thanks
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gzifcak  
#2 Posted : Saturday, April 24, 2021 2:43:53 AM(UTC)
gzifcak

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Same issue, testing now to try to figure out exactly what's going on. Main output multiview audio sync is different than the ISOs recorded from outputs 2-4, with audio from the buses.

In our first test:

Main output: participant A audio delay pretty consistently bad, participants B and C seem OK.

ISOs: participant A audio is not too far off, participants B and C are late by up to 2 seconds
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Vince Beck  
#3 Posted : Saturday, April 24, 2021 4:06:10 AM(UTC)
Vince Beck

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Do you have any dropped frames in the multicorder?
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gzifcak  
#4 Posted : Saturday, April 24, 2021 5:45:38 AM(UTC)
gzifcak

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Good question, thanks. The sync issue in these files was discovered after the fact, we will check during our next test.
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