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Premiere Pro CC 2014 / Preferences / Playback / Video Offset not working ? (BMD output)

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James Cohen
Premiere Pro CC 2014 / Preferences / Playback / Video Offset not working ? (BMD output)
on Mar 10, 2015 at 10:44:05 pm

We are having a really hard time getting video / audio sync in our client monitor. It seems like the video offset in preferences -> playback -> Blackmagic Video offset is what we need to modify to get everything in sync. However, maxing it out to 500ms does not seem to have any effect at all. We can modify the audio offset, but it pushes everything more out of sync.

By manually unlinking the audio in the sequence, and slipping the audio 5 frames later makes the audio and video appear in sync in the client monitor. But the editor can't working with everything in his timeline 5 frames out of sync.

Is there a way to do the same offset through the Blackmagic pane of system preferences?

Here is our setup:

5k iMac
OSX 10.10.1
Sonnet Echo Express III-D
Blackmagic Studio Decklink 4K
Desktop Video 10.3.5
HD-SDI output
AJA Hi5-3D converts to HDMI
Sony XBR client monitor
Analog Audio out of Blackmagic pigtail

We also tried going directly from the Blackmagic card's HDMI output directly to the monitor (cutting out the HD-SDI to HDMI conversion), but it did not fix it.


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James Cohen
Re: Premiere Pro CC 2014 / Preferences / Playback / Video Offset not working ? (BMD output)
on Mar 11, 2015 at 4:04:45 pm

We have another suite that is identical except that it has a Kona 3G instead of a Blackmagic card.

In that suite the preferences -> playback -> Kona Video offset actually effects the playback.

So my guess is that something is gummed up in the interface between Premiere and the Blackmagic card.

I'm not sure whether Adobe or Blackmagic should address the bug.


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Josh Cramer
Re: Premiere Pro CC 2014 / Preferences / Playback / Video Offset not working ? (BMD output)
on Mar 13, 2015 at 3:19:09 pm

Same exact problem here. Any luck at all in getting this to work? We are having the same issue on multiple BM cards/devices and multiple computers (both old and new Mac Pros).


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James Cohen
Re: Premiere Pro CC 2014 / Preferences / Playback / Video Offset not working ? (BMD output)
on Mar 13, 2015 at 5:22:28 pm

I talked to Blackmagic support, and they thought our signal flow was introducing some latencies.

They looked up our Sony XBR manual and found a "game" mode that is a low latency mode that bypasses a bunch of the algorithms the consumer monitor does. It went in through the options and turned off any other options like "Reality Creation" or "Smooth Gradation" or the "CineMotion" thing that makes everything look like a soap opera.

In our case, the HD-SDI output, through the HDMI converter carries video and audio. So we can play audio out of the TV speakers on the client monitor and the sync is spot on.

The problem is that the editor is used to hearing the zero latency analog audio at their desktop through Genelecs. If the analog editor speakers are up, and the client monitor TV speakers are up, there is a echo (that represents the latency between the two signals.)

So the Premiere GUI and the editors speakers are still fairly out of sync from the client monitor.

The Preferences / Playback / Video Offset seems like it would help, but doesn't seem to be working.


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James Cohen
Re: Premiere Pro CC 2014 / Preferences / Playback / Video Offset not working ? (BMD output)
on Mar 13, 2015 at 11:00:09 pm

We swapped our Sony XBR monitor with a Panasonic Plasma (that we have been using for years).

The Plasma has a direct HD-SDI input.

The sync looks good using the older professional monitor. So it must have been the latency introduced by the AJA Hi5-3D HDMI converter and the consumer monitor doing all its upscaling algorithms or whatever it does.


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