Audio out off sync

[Volodymyr Kashuba]

So nobody has an answer why audio is out of fync on timeline???

Windows 7 Ultimate 64bit,
Intel Core i7-2600K Sandy Bridge 3.4GHz (overclocked to 4.5GHz),
CORSAIR CWCH50-1 High Performance CPU Cooler, ASUS P8P67 PRO,
G.SKILL Ripjaws X Series 16GB,
EVGA GeForce GTX 460 (Fermi) 2GB ,
Matrox MXO2 with MAX,
COOLER MASTER HAF 932 Black ATX Full Tower Computer Case,
Adobe CS 5 Production Premium

[Jon Barrie]

What are your clips audio properties and then what are the sequences audio properties?

Are they the same kHz rate?

If there is a disparity between them this can cause progressively worsening audio sync slip.

To fix this you want to work in a sequence with the same audio kHz rate as the clips.

Frame rates can also create issues if there is a mismatch there too.

– JB

Jon Barrie
Adobe Video Solutions Consultant ANZ
Jon’s YouTube Tutorial Page
follow Jon with twitter

[Volodymyr Kashuba]

Thankyou Jon for traing to help.

The property of video clip is .MTS files 1080i NTSC 29.97fps audio is 48000kHz.

Project seting is exectly this same. Matrox HD project 1080i 48000kHz NTSC 29.97fps.

I try non Matrox just Premiere Pro SC5 NTSC 29.97fps AVCHD 1080i with 48000kHz project – this same results, audio is out of sync for about 10 frames.

I am not new to Premiere, I edit in Premiere for last 10 years sins Premiere 6.0 and never had any problem like that. I have no idea whot causing this.

Premiere Pro SC5 version 5.0.3 (005(MC:218798)) with the latest updates.

Before I made this project I complitly cleared cache folders over the Premiers preferences dialog and manualy going in to cache folder and deleating ALL files.

Windows 7 Ultimate 64bit,
Intel Core i7-2600K Sandy Bridge 3.4GHz (overclocked to 4.5GHz),
CORSAIR CWCH50-1 High Performance CPU Cooler, ASUS P8P67 PRO,
G.SKILL Ripjaws X Series 16GB,
EVGA GeForce GTX 460 (Fermi) 2GB ,
Matrox MXO2 with MAX,
COOLER MASTER HAF 932 Black ATX Full Tower Computer Case,
Adobe CS 5 Production Premium

[Ben G unguren]

Is the out-of-sync material in a constant offset? That is, if you slide the audio 10 frames to put it in sync, does it remain in sync? Or does it drift out of sync after a while?

In my experience, this tends to happen when sample rates are off, when drop-frame/non-drop-frame footage gets muddled, when the recording device has gone wonky, or when there is a bug in the codec or editing app. In your case, my guess is it’s one of the latter two.

I’d examine the source of the footage — have you tried importing footage from the same model but a different physical camera? Have you tried importing footage from a few months ago shot with the same camera (back when you weren’t getting these errors)? If you open old edits that weren’t experiencing these errors, do they still work properly? It would be helpful to identify if this is a system problem or if it’s an equipment problem….

Ben Unguren
Motion Graphics & Editing
http://www.mostlydocumentary.com

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[Volodymyr Kashuba]

Thank you Ben for traing to help.

Yes, the out-of-sync material in a constant offset for about 10 frames on recording of 1(one) hour long.

As I stated before if I preview original files in windows media player – video and audio is in sync. It goes out-of-sync only after I import footage in to Premiere.

I always copy the entire PRIVATE folder from SDHC card to hard drive, and then importing from that hard drive folder in to project.

I am saing original, becouse I do not convert them to diferent format. And how could be the original files of video and audio out of sync???

The project is the wedding recorded with 2(two) identical Panasonic AG-HMC150 cameras, and footage from both camera is in sinc in Windows Media Player and OUT-OF-SYNC in Premiere, so it cant be recording device.

I did not try to open the old project yet. I will do it right now and will post the results.

Thank you.

Windows 7 Ultimate 64bit,
Intel Core i7-2600K Sandy Bridge 3.4GHz (overclocked to 4.5GHz),
CORSAIR CWCH50-1 High Performance CPU Cooler, ASUS P8P67 PRO,
G.SKILL Ripjaws X Series 16GB,
EVGA GeForce GTX 460 (Fermi) 2GB ,
Matrox MXO2 with MAX,
COOLER MASTER HAF 932 Black ATX Full Tower Computer Case,
Adobe CS 5 Production Premium

[Volodymyr Kashuba]

Ben, I did what you suggested, and after that I am goin complitly crazy…

I did two experiments:

No:1.
I opened project edited in February 2011, evrithing is OK and in sync, but if I import footage from my recent project – it is out-of-sync.

No:2.
I imported footage from the February project(evriting in sync) in to the recent project and evrhiting still to be in sync, but recent footage out-of-sync.

So, does’t matter whot I do, recent footage from both camera is in sync in Windows Media Player, but out-of-sync after I import in to Premiere.

Windows 7 Ultimate 64bit,
Intel Core i7-2600K Sandy Bridge 3.4GHz (overclocked to 4.5GHz),
CORSAIR CWCH50-1 High Performance CPU Cooler, ASUS P8P67 PRO,
G.SKILL Ripjaws X Series 16GB,
EVGA GeForce GTX 460 (Fermi) 2GB ,
Matrox MXO2 with MAX,
COOLER MASTER HAF 932 Black ATX Full Tower Computer Case,
Adobe CS 5 Production Premium

[Ben G unguren]

Well, that’s good news! A constant offset is much better than audio drift, IMO. Much easier to fix.

Have you tried exporting an out-of-sync clip from Premiere (into an H264 codec, e.g.) — does the audio drift show up there? That way you can find out if it is a playback-in-premiere issue or if it’s an importing-the-audio issue.

Are all your codecs up-to-date?

If there are only a few clips, I’d just sync them up in Premiere and export them from your current interframe codec (AVCHD, I’m guessing?) into a more-reliable intraframe codec (ProRes, DNxHD) and go from there…. Obviously this doesn’t uncover the problem, but it does allow you to press on with your work….

Ben Unguren
Motion Graphics & Editing
http://www.mostlydocumentary.com

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[Ben G unguren]

That’s very helpful information, but I’m afraid I still don’t’ know exactly what the problem is. Is this a different camera (broke the old one, ordered a replacement)? Maybe the firmware is a different build or something — did you update the firmware?

The changes seem to be happening BEFORE it gets into Premiere. Though the problem may be an interpretation issue in Premiere. For now, updating all video codecs seems the most important step. You’ll probably find all you need on the Panasonic website, in the support section. Download, install, try again (ask everyone you know to cross their fingers for you. I’m busy at work, but I’ll keep my tows crossed on your behalf!).

Ben Unguren
Motion Graphics & Editing
http://www.mostlydocumentary.com

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[Volodymyr Kashuba]

Thank you Ben for help with this issue.

The firmware an both cameras is this same and it is the latast from Panasonic sait, and they never was brocked or replased.

The Premiere Pro SC5 version 5.0.3 (005(MC:218798)) with the latest updates.

The Matrox Tool is the latast from the Matrox site.

I did not try to export in to H.264 format and check if the problem stiil there, I will try to do that.

I will unlink the video and audio and manualy moove audio 10 frames to sync with the video just on this project to finish the project.

Thank you again.

Windows 7 Ultimate 64bit,
Intel Core i7-2600K Sandy Bridge 3.4GHz (overclocked to 4.5GHz),
CORSAIR CWCH50-1 High Performance CPU Cooler, ASUS P8P67 PRO,
G.SKILL Ripjaws X Series 16GB,
EVGA GeForce GTX 460 (Fermi) 2GB ,
Matrox MXO2 with MAX,
COOLER MASTER HAF 932 Black ATX Full Tower Computer Case,
Adobe CS 5 Production Premium

[Jeff Pulera]

Hi Volodymyr,

When using the Matrox hardware, you have to consider how you are monitoring the audio, as there are several options.

By default, when playing back a Matrox sequence in Premiere, the sound only comes out of the Matrox hardware, and NOT the system sound card. This audio should be in sync with the video.

In Playback Settings, there is an option under the AUDIO tab to “Use System Soundcard”, which will route the audio through the computer sound card, but sync is not guaranteed that way.

If using an HDMI display to monitor video from MXO2, but audio is NOT coming from the HDMI display, this can cause the audio to APPEAR out of sync since there is some signal processing latency that delays the video a few frames on some displays, while the audio coming direct from Matrox hardware outputs is “live” and therefore ahead of the video. My HDMI display has a speaker jack on the back and that is how I monitor my audio to insure preview sync.

Another option is to make the Matrox hardware the default device for system sound. Go to Control Panel > Sound Devices and choose the Matrox listing as default.

Also, your AVCHD clips should be imported using the Adobe Media Browser, rather than direct Import – if not already doing that, it is good practice.

Jeff Pulera
Safe Harbor Computers