Video Assist audio sync a tad off.

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Tony Esposito

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  • Joined: Thu Oct 31, 2013 1:51 am

Video Assist audio sync a tad off.

PostSun Jun 19, 2016 7:22 pm

Just purchased 2 video assist and cards to handle the record. Been using them on live events for recording concerts. I love these units! My set up is; I come directly out of the SDI program out of the ATEM 1 Switcher, into a Blackmagic 1X8 SDI DA and one of those feeds goes into the video assist for audio and video record. Now I know some media players will put off sync sometimes when viewing so I find the ones that work best. With this set up it is just a tad off (something really only editors will notice) from my audio to video sync. I was wondering if anyone else has noticed this, or is there a better set up for me to use to feed the record.

I'm using SanDisk 256GB Extreme Pro 95MB 10 Cards

Thanks,
Tony
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JesseMaitland

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  • Joined: Mon May 30, 2016 5:42 am
  • Location: California

Re: Video Assist audio sync a tad off.

PostThu Jun 23, 2016 1:07 am

I too am having a sync issue. Im using a lexar 128gb Card. I was recording ProResLT and for the most part it was fine. I kept getting a dropped frame error, but tried various cards. Only one recording so far actually has a sync issue. It was a solid half second delay. My 5" video assist was connected directly via SDI to the MicroStudio 4k.
Jesse Maitland -
ATEM Production Studio 4k
Micro Studio 4K
and other awesome blackmagic gear
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Tony Esposito

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Re: Video Assist audio sync a tad off.

PostFri Jun 24, 2016 1:27 am

Humm, I didn't see a drop frame error on any of mine. If we don't get an answer soon I will write support and post answer in here.
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Paul Peltekian

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Re: Video Assist audio sync a tad off.

PostMon Jul 17, 2017 5:52 pm

I just got my VA 4k last week and I too am experiencing much worse audio drift then some of you are discribing. I still need to do some more tests, but there is a very noticable drift after several minutes and several frames off by the end of a one hour recording.

Anyone else experience this?
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Tony Esposito

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Re: Video Assist audio sync a tad off.

PostMon Jul 17, 2017 7:13 pm

I've only played with my audio delay box once so I need to set it up and watch lips and tune it in I guess. You would think they would already know from test that the audio is delayed by xx on the VA to help us out.
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Paul Peltekian

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Re: Video Assist audio sync a tad off.

PostMon Jul 17, 2017 7:18 pm

My guess is that it's dropping video frames, but audio continues to record as usual. For example, after a massive dropping of frames, video obviously skips, plays for another second or two, then show as Media offline in avid while audio continues to play normal.

Paul

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