Capturing out of sync

[Walter Biscardi]

[Richarde007] ”
Yep, that’s what i’m getting.”

Then I really don’t have any other input for you. This is something I’ve not seen here at all. We have a Sony J3/902 multiformat player, but we have SDI output on our deck. No sync issues there at all.

I would contact AJA Tech support and see what they have to say.

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

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[Bob Zelin]

Richard,
If walter has not made this perfectly clear to you by now, please let me repeat. Your audio on your “sound sticks” will NEVER EVER EVER be in sync – you MUST monitor your picture, and you must monitor your audio from the output of your Kona card – NOT THE INTERNAL AUDIO OUT OF YOUR MAC. I don’t care if this doesn’t make sense to you. JUST DO IT. Your problems will be gone.

Bob Zelin

[Frederic Lumiere]

As far as monitoring properly, if you are playing the video on the computer screen and monitoring the audio from the computer, it should be a true representation of your sync.

Basically, you don’t want to monitor the video through the kona card and the audio from the computer (or vice versa).

Simply opening your clip in QT an playing the audio from the computer (not via the kona) should show you accurately if you have an issue and it sounds like you do.

Are you capturing the audio embedded in the SDI signal from the Digibeta?

Frederic

[Frederic Lumiere]

[Richarde007] “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.”

Ah, you aren’t ingesting via SDI – I’ve never been successful getting analogue audio in and component video in to sync well direct into the Kona. I use an IO as an intermediate to convert the analogue signals to one digital SDI signal with embedded audio.

But then again, I’m sure someone else here has been successful with your setup.

Finally, make sure you use the easy setup for AJA PAL 8 bit uncompressed to insure all is set properly.

Frederic

[Walter Biscardi]

[lumiere] “Ah, you aren’t ingesting via SDI – I’ve never been successful getting analogue audio in and component video in to sync well direct into the Kona.”

I know there are a lot of folks using the LH and LHe with component video / analogue audio.

We use an AJA HD10AVA converter to take Component and Analog audio from our HDV decks and convert those to SDI with embedded audio into our Kona 3’s.

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]

Lumiere,

I’m capturing through analogue. if i do just play the captured quicktime file the sync is still out which is what is puzzling me.

Would you recommend the AJA HD10AVA box then to embed the audio?

[Frederic Lumiere]

[Richarde007] “Would you recommend the AJA HD10AVA box then to embed the audio?”

I guess but you should be able to get your setup to work.

Is the audio consistently off sync (number of frames) or is it a slip (offsync frames increases over time)?

[Walter Biscardi]

[Richarde007] “Would you recommend the AJA HD10AVA box then to embed the audio?”

You should not require this, the setup should work as is. What did AJA tech support say?

Is the audio out of sync when you play back the same Quicktime files on another 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]

AJA support didn’t really suggest anything different to what everyone is saying here. Trash my preferences, reinstall etc. I spoke to Rudy and although he was very helpful couldn’r seem to work out the problem.

The synch seems to be consistently out most of the time but occasinally will slip in. This could be some of the old source material i’m dealing with though.

Yes, it’s out of sync on a pc and when compressed to MPEG2 and put in a DVD player.

[Neil Sadwelkar]

Just capture a small section of tape which has some definite sync – a door slamming shut, something falling etc.

See the picture and waveform in FCP and observe if they are in sync.
Preferably take a screenshot.
Go to another known good sync system. Any system even non-AJA-FCP will do,
Capture the same there and see waveform.
Preferably take a screenshot.

Compare the two. If the offset in waveform and picture is the same in both systems, then your system is good. If not, you need to forward this to AJA with details.

I’ve spent a lot many hours troubleshooting a system with ‘sync issues’ only to find that the client’s tape had dodgy sync through really bad ADR/Foley.

Alternately you can create a ‘sync test’ tape with a few minutes of black with a 1 frame pop every second or so. But don’t use your system to make this tape unless you’ve sorted your sync issues.

Neil Sadwelkar

FCP Editor, Mumbai, India.
Completely PAL.