Capturing out of sync

AJA Video Systems

Capturing out of sync

Posted by Richarde007 on July 19, 2007 at 11:00 am

Hello,

I’m new to the forum and to Macs and Video Capture in general.

I’m trying to capture Digibeta masters to the encode into MPEG2 for DVD release.

I’m using Final Cut Pro 5.1.4

Mac Pro Intel Dual 3GHz
4GB Ram
1 TB Internal HDD (No external drives)
AJA Kona LSE Card
Sony J 30 Digibeta connected through component and analogue XLR’s to the Kona breakout cable.
I monitor with my desktop monitor and all audio is line out through soundsticks.

Basically i am unable to capture audio and video (PAL) in synch through this setup. When i first got the digibeta i was using firewire and capturing in DV format and everything then was in synch. Then i was told that i really ought to be capturing in 8 or 10 bit unbcompressed using a Kona card. Since then in either of those formats nothing synchs up.

The audio seems to happen approximately 1-2 frames ahead of the video and this is so in the log and capture window, canvas, viewer and on all exported quicktime and mpeg2 files…… basically please can someone help me as this is doing my head in. I’m just using the Kona 8 bit uncompressed easy setup in FCP if that helps.

Many thanks in advance

Richard

Neil Sadwelkar replied 19 years, 1 month ago 5 Members · 20 Replies
20 Replies

Walter Biscardi
July 19, 2007 at 1:05 pm

System Settings > Playback Offset > Frame Offset.

Set to 0 when using the Kona board.

Set to 4 when using DV. (4 is default)

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Broadcast and independent productions.

All Things Apple Podcast! https://cowcast.creativecow.net/all_things_apple/index.html

Read my blog! https://blogs.creativecow.net/WalterBiscardi
Richarde007
July 19, 2007 at 1:12 pm

Walter,

Thanks for getting back to me so fast.

I forgot to mention that i’ve already done that after scouring the net for any leads and still no joy.

Any other ideas?
Walter Biscardi
July 19, 2007 at 1:14 pm

[Richarde007] “I forgot to mention that i’ve already done that after scouring the net for any leads and still no joy.

Any other ideas?”

How are you monitoring your video and sound?

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Broadcast and independent productions.

All Things Apple Podcast! https://cowcast.creativecow.net/all_things_apple/index.html

Read my blog! https://blogs.creativecow.net/WalterBiscardi
Richarde007
July 19, 2007 at 1:17 pm

With a desktop monitor and headphones or lineout desktop speakers.

I realise this isn’t ideal but surely this shouldn’t affect the actual capture and export?
Walter Biscardi
July 19, 2007 at 1:20 pm

[Richarde007] ”
With a desktop monitor and headphones or lineout desktop speakers.

I realise this isn’t ideal but surely this shouldn’t affect the actual capture and export?”

You MUST monitor the Kona and NOT the computer when playing back video via Uncompressed HD.

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Broadcast and independent productions.

All Things Apple Podcast! https://cowcast.creativecow.net/all_things_apple/index.html

Read my blog! https://blogs.creativecow.net/WalterBiscardi
Richarde007
July 19, 2007 at 1:23 pm

Ok, so what do i need to put on my shopping list ideally? External monitor and powered speakers that accept XLR connections?

It isn’t HD btw, it’s SD PAL
Walter Biscardi
July 19, 2007 at 1:30 pm

If you had the Kona breakout box, you would have RCA connectivity. Since you don’t, you can either get audio monitors that support XLR or simply pick up some XLR to RCA adapters to connect to just about any audio monitors.

As for the video monitor, any video monitor will do, even a regular TV if that’s what you can afford. You can run component or composite out of the Kona to the TV. We run the Sony PVM broadcast series here.

The main point is you need to be watching and listening to the Kona, not monitoring through the computer.

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Broadcast and independent productions.

All Things Apple Podcast! https://cowcast.creativecow.net/all_things_apple/index.html

Read my blog! https://blogs.creativecow.net/WalterBiscardi
Richarde007
July 19, 2007 at 1:33 pm

Sorry to labour the point but basically what you’re saying is that I am introducing the sync problems by not doing so. If i setup FCP so that everything is set to monitor through the AJA card it will then capture in sync and then i will be able to export in sync?
Walter Biscardi
July 19, 2007 at 1:50 pm

[Richarde007] “If i setup FCP so that everything is set to monitor through the AJA card it will then capture in sync and then i will be able to export in sync?”

this only has to do with playback, not capture or export.

So when you look at the waveforms in the timeline, you can clearly see that the audio is out of sync with the video? I’ve never seen this here with Kona captures and I do some work in PAL.

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Broadcast and independent productions.

All Things Apple Podcast! https://cowcast.creativecow.net/all_things_apple/index.html

Read my blog! https://blogs.creativecow.net/WalterBiscardi
Richarde007
July 19, 2007 at 2:34 pm

“So when you look at the waveforms in the timeline, you can clearly see that the audio is out of sync with the video? I’ve never seen this here with Kona captures and I do some work in PAL.”

Yep, that’s what i’m getting.

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