HELP! Audio goes out of sync after export!

OK, folks. I need your help. I have a looming deadline of THIS FRIDAY to hand this in.
I have a finished multicam edit of a show that runs 1 hr 20 min. It plays back perfectly in the timeline, all video and audio perfectly in sync. Looks and sounds exactly like what I need.
When I export the video as an H.264 file, the audio gets out of sync with the video by 13 frames! But that's not all... It doesn't happen to the entire audio track. There's about 50 minutes in the middle of the video where the audio goes out of sync. The audio at the beginning and ending of the video is lined up perfectly in sync. It's just the middle section that gets screwy.
What do I do?!
This has never happened before, and I've worked a lot with multicam in Premiere Pro CC before this. Never been an issue. I tried uninstalling and reinstalling Premiere, and also deleting all media cache files, but still no dice. I also tried copying the clips into a new sequence in the same project, copying the clips into a new sequence in a NEW project, nesting the sequence... nothing works.
My setup:
MacBook Pro Retina (Rev. A)
Premiere Pro CC (latest version)
Panasonic GH3 footage in 1080p 24p AVCHD timeline
3 cameras & 1 audio WAV file in Multicam
Any help would be greatly appreciated!

OK, I figured out how to fix it:
In Premiere Pro CC, click on SEQUENCE > DELETE RENDER FILES.
Try exporting the movie again.
It worked! I exported the same sequence, and it took a long while to re-render the audio files, but when it was finished exporting the audio and video were in perfect sync. I'm not sure what caused it, but this fixed it, so hopefully anyone else having this issue can save a lot of time by reading this.
Cheers!

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My audio goes out of sync after export

Please help.

Hi Meet,
We need a lot more info to help: FAQ: What information should I provide when asking a question on this forum?
Thanks,
Kevin

My audio goes out of sync after import

I have a bunch of masters of 1h documentaries that I've done using Adobe Premiere CS6. I've exported the masters using exactly the same specs:
Apple Pro Res 422 (HQ), 23.98fps, 1920x1080p, 48kHz, 16b, PCM audio.
I have to do some changes on the masters of these shows. They all play fine on several players like VLC, Quicktime, Mpeg Streamclip, etc. However after I import the masters into Premiere Pro CC, 3 out of 10 shows get the audio gradually out of sync, even on the source monitor before I put them on a timeline. The behaviour continues even after I place them on a timeline.
The project settings are the same as the masters and so are the sequence settings. I've tried to recreate the project, delete and re-import, duplicate the file and import that, and no matter what I do the same 3 masters go out of sync after the import.
I've tried to find a solution in many forums and despite noticing that several people have the same issue, no one has a valid solution for my problem.
I cannot go back to CS6 since my company updated their systems to CS7 so I can't even cross check.
Any suggestion will be most welcome.
Thanks in advance peeps.
NJ

Couple of suggestions.
First, rather than opening the Master export, go back to the original project. That should open fine in CC.
Second, with a CC subscription, you do have access to the full CS6 suite.

Rate Stretch audio goes out of sync when exported.

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I had it all synced up in the playback on iMovie and had it aligned with visuals, however, after burning, it gets displaced and everything gets off...
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The problem:
http://www.dvformat.com/htm/features/2000/800/dv_formatfaq.htm
(Scroll down about two thirds to "What's the difference between locked and unlocked audio?" )
The solution:
Always use 16-bit/48kHz audio.
iMovie: Audio and Video Lose Synchronization
http://docs.info.apple.com/article.html?artnum=61636
A few possible solutions here:
http://www.danslagle.com/mac/iMovie/audio/1001.shtml
iMovie: Improving audio and video synchronization
http://docs.info.apple.com/article.html?artnum=42974

Audio goes out-of-sync after adding photos to video

iMovie HD 5.0.2 here. I have one main 10-minute video clip and am trying to splice the video to include a few photos, which maintaining that video's audio track throughout.
After importing the video, I extracted the audio. But when I dropped in a photo, any video AFTER that photo is now out-of-sync with the audio track. (I'm not really fiddling with the visual timeline; I just split the video clip at playhead, insert photo, and any video after the photo winds up out of sync.)
Is this a problem with the dated software? Is there a workaround? If I should upgrade, what should I upgrade to? I really love the simple video and audio timeline of iMovie HD; it's perfect for my needs and I don't want to lose it...

OK
I'm a soft head. Now I understands what You want to do.
OK there is a smart way to exchange video for a photo but keeping the audio. BUT
I use a much more raw way of doing this.
I import my photo. Set a duration for it eg. 4 sec => 00:00:04:00 exactly
then I select the video clip
Extract sound - so that I don't affect this when doing the brain surgery
Cut in the video part away exactly 00:00:04:00
Select the photo clip - drop this before the un-needed video clip
Select the un-needed video clip and delete this.
Now I've replaced a pice of the video with a photo but the sound flows as it
was un-tuched.
I always work this way - think it has to do with super-8 film editings during
the stone-ages.
There is a function in iMovie that does this - replace action but I've never used it.
Yours Bengt W

Audio/video out of sync after export

My son Charley and I are working on a simple project, where we have imported an MP4 file into Premiere Pro, then edited it, with no problems, but when he exports the file (either to an MP4 or FLV), there is a small but noticeable audio-video sync problem on the exported file. There does not seem to be a sync or other problem with the source file, nor with the edited file as viewed within PP. But on the exported file, the audio seems to run slightly ahead of the video.
When we upload one of these exported files to Youtube or Vimeo, the sync problem seems to become more noticeable than in viewing the exported flv or mp4.
We cannot find a solution in searching the Forums. Charley consulted with another more experienced videographer, and they tried for hours to no avail.
Charley is using Premiere Pro CS5.5 on a Mac (MBP Mid-2009 2.53 Ghz Intel Core 2 Duo, using OSX 10.6.8).
We see lots of discussion about frame rate. Charley put the settings to 'match source' but maybe there is something else we're supposed to do.
He can post screen shots of all the settings, if that will help. Adobe provides no phone support for PP and just sends us back to this Forum.
Any help much appreciated.
Michael Lanning

Kevin: OK, that's helpful. Charley is at work until 3:15 Eastern; in the meanwhile, I'm trying below to reply to your inputs; sorry if some of my questions are illogical, just reflecting my confusion.
You say to match source settings, including audio sample rate, and (I think) that we should do that by creating a new sequence at which time we select the clip and drag it to New Item button. Perhaps doing that would make some of the following questions irrelevant, I'm not sure, but here they are:
We did not check the box "Match Sequence Settings" (just under 'Export Settings'); should we have done so?
On Presets, and using FLV vs H.264:
Do we need to leave the 'Match Sequence Settings' box Unchecked if we want to use a YT or Vimeo Preset?
FLV does not seem to have a pre-set for YT or Vimeo, but does have one for 'Web.' H.264 does have YT and Vimeo pre-sets. As I've mentioned, we have been trying to make this work with FLV, as Charley found that H.264 was giving us (worse) sync problems. Maybe we should go back to H.264.
You say that "if these things don't work, "...try an similar H.264 preset to upload to" YT. Do you mean to suggest that we try exporting in H.264 instead of FLV? (If that's not what you mean, and if we still work with FLV, then I don't know what "an similar H.264 preset" would be; do you mean like the 'Web' preset?
Whether FLV or H.264, I'm unclear how ensure audio sample rate matches source.
Codecs listed on source file are H.264, AAC; does that imply that under 'Basic Audio Settings' on Audio settings tab, we should use an AAC codec rather than the MP3 now indicated?
Should we be determining the bitrate settings of the source (ie, right click the file within PP to find the properties, including bitrate?) and then using that bitrate?
Or do we resolve all this about audio sample rate simply by creating a new sequence as discussed above?
I hope these questions make sense. Thanks again for your help.

Audio Goes Out Of Sync On Export

Hello,
Im exporting an Hd 1440x1080, 29.97, HD 1080i60 sequence to a self contained QT movie. Its about 70 minutes long. By the time we get to the toasts in the reception, the video is at least a second ahead of the audio. This always happens with my HD exports, or even if I send directly to compressor to create a BluRay. Any work arounds
Thanks
MG

1080i60 is 29.97, so no problem there.
Please list the 'item properties' of the clips (audio and video) and the 'sequence settings' you're using.
Also, dbl-check the audio rate...is it exactly 48kHz or something like 47.998 or 48.002. If it's not exactly aiff/48kHz/16bit, you could see sync issues.
But let us know exactly what you're working with.
K

How do I stop my video & audio going out of sync after adding a still.

Audio/Video Settings - Sequence Preset HDV - 1080i50, Capture HDV, Device preset SonyHDV 1080i50 Firewire, Vid playback Digital Cinema Desktop Preview-Main, Audio Default.
Easy Setup - Format HD, Rate 25.00fps, Use HDV.
Sequence Settings - Gen. Tab Frame Size 1440 x 1080, Aspect Ratio HD (1440x1080) (16:9), Pixel Aspect Ratio HD (1440x1080), Anamorphic unchecked, Field Dom. Upper(odd), Editing Timebase 25, Quicktime settings HDV 1080i50, Quality 100%, Audio Settings Rate 48kHz, DEpth 16 bit, Config Channel Grouped.
I have not tried reloading FCS.

Hold your horses everyone, I've done it ,Yippee!!
It's all down to Percy, that is perseverance, I do not like to give up.
Under Sequence in the Menu bar I clicked on Sequence Settings. There under Render there is a Render Control tab. I changed the codec from 'Same as Sequence Codec' to 'Apple ProRes 422 [HDV, XDCAM HD/EX/HD422 only]' and everything is back to normal, even the pixelating text (see an earlier post of mine). The rendering is quick as well. The world is my oyster.

Video and audio goes out of sync when imported into Premiere

I have some videos ripped from some DVD that an acquaintance made, with an open source program called HandBrake, with the default "high profile" settings. When I play it both in VLC and in Quicktime, it plays just fine, but when I import it either in Premiere or in After effects, the video and audio goes out of sync (the video ran faster than the audio and when the video stops, the missing audio is trimmed).
Video info according to Premiere (in Spanish but you may get the meaning).
Ruta del archivo: [...].m4v
Tipo: Película MPEG
Tamaño de archivo: 667,7 MB
Tamaño de la imagen: 720 x 480
Profundidad en píxeles: 32
Velocidad de fotograma: 29,97
Formato de audio de origen: 48000 Hz - comprimido - Estéreo
Formato de audio del proyecto: 48000 Hz - Punto flotante de 32 bits - Estéreo
Duración total: 00:30:35:15
Velocidad media de datos: 372 KB / segundos
Proporción de píxeles: 0,8889

"HandBrake, these days, is almost entirely about H.264 video, aka MPEG-4 Part 10. HandBrake is migrating to quality-based encoding."
Hmmm. I use HC Encoder to make my DVDs because it's the only free encoder I've found with the much more professional Constant Q encoding option. But HC Encoder doesn't do HD sources for Blu-ray, so I've been wondering if I'd be stuck with the lame-*** consumer CBR and VBR options most encoders provide (including Adobe - hint, hint) when I eventually start working in HD. This is a very interesting program, Handbrake. I will have to check it out.

When audio goes out of sync..

In FCP7, when audio goes out of sync with the video track it came from (even when they are unlinked), a red warning box is displayed on the audio track and tells you how far out of sync it is, which easily enables you to resync.
Well, in FCX my audio went out of synce, but i didn't know it until i played back a segment i was working on, where i spliced two audio tracks and video tracks together. Right now i'm trying to fix the one audio track so that is synced up with its parent video track, but so far i'm just guessing that it's a good sync rather than knowing FOR SURE whether or not it's truly synced back up.
Is there any kind of work around, which enables you to resync in a manner similar to before FCPX?
Thanks

I am not sure if your problem has been solved already but here is the way to do that:
select in the clip in the timeline the part were the audio should be return in sync. use the blade-tool to make that part a seperate clip.
Higlight this clip in the timeline and use shift-F to highlight this clip in the browser. There it wil show up partially of course.
Use only the audio and put that part under the selected clip in the timeline where you need the original audio. remove the original out-of-sync audio.

Audio sync problems with greenscreen I have replaced the camera audio with my zoom recorder audio and it is in sync. When I apply greenscreen the audio goes out of sync. What am i doing wrong?? So frustrating..Thanks, Peter

I have replaced the DSLR audio with audio from my Marantz recorder and it is in sync with the dialogue. I apply green screen and the audio goes out of sync. Cannot seem to make it work. what am I doing wrong? Thanks, Peter

Thanks for the reply. I don't have time for this. is it time to switch to a different editor?

Audio and video out of sync after exporting sequence

I'm a FCP user since years, but not so common with HD footage. Therefore I have an issue with my finished edited movie after exporting: Video and Audio are out of sync.
My sequence settings are: HDV1080i50, 25fps, 48kHz, 16bit, Stereo. I used File-> Export-> Quicktime Movie -> Current Settings
Sequence has a duration of 61 minutes and 38 sec. I tried to find out where's the problem and exported audio and video seperated. This results in:
Video is 61 minutes and 27 sec long
Audio is 61 minutes and 38 sec long
That means exported video is shorter than original sequence.
What could that be ?

I had the same problem with a Panasonic camera, even filming at 30 fps. I was able to fix it; see [this thread|http://discussions.apple.com/thread.jspa?threadID=1783029&tstart=0]. It's a frustating problem, to be sure. You might have to use Easy Setup a couple times before you get things to work properly. Not sure why that's the case.
Good luck!
Message was edited by: Anthony M Kassir MD

Audio out of sync after exporting into Quicktime using current settings.

Quicktime file has audio out of sync when I export to quicktime movie using current settings.
Ok for about the first few minutes then, out of sync after about 10 minutes.
I shot the footage on tape with my Sony HVR-Z7u.
My Sequence setting is the same as the format of the footage as shown below.
Pixel Aspect Ratio: HD 1440x1080
Editing Time base: 23.98
Quicktime video settings: Compressor: HDV 1080p24
Audio Settings: Rate 48 KHz
Depth: 16bit
Clip format:
Pixel Aspect Ratio: HD 1440x1080
Vid Rate: 23.98
Compressor: HDV 1080p24
Audio Rate 48 KHz
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I recently moved and both of my editing machines were unplugged for a couple of days until I could get them set up. After turning them back on, the problem had disappeared. Perhaps leaving the system unplugged had allowed some of the internal components to reset? That's the only thing I can think of. At any rate, the issue is gone.

DVD & Blu-Ray audio out of sync after export

When I use FCP X's built in DVD or Blu-ray export option, about halfway through the video, the audio becomes out of sync and becomes ahead of the video.
How can I fix this?

Freddy,
You will see that I am experiencing the same issue with my DVDs and BDs per my question 3 hours prior to yours. It never was an issue until very recently. I may have a solution. Realizing that my audio was acting as if I had "Drop Frame" audio attached to "Non-Drop Frame" video, I went back to my source material to verify my acquisition settings. All elements of the production were recorded appropriately as "Drop Frame." Playback on the "Timeline" (Passé now) was perfect. No audio sync issues there. So I felt it must be some rendering setting within Compressor and the render engine. When you go to Compessor (Send to Compressor), you will gain access to the audio render settings for both DVD & BD. Typically, the "Retiming" under the "General" tab of the Audio Inspector is set to "100% of source." I Went ahead and checked off the radio button below that to render the audio at the exact duration of my program (nearly 3 hrs long). I did this for the DVD version of the program and placed it into DVD Studio Pro to replace the bad sync audio. Well wudda ya know....it worked. I haven't burned the DVD yet, but that is next. I suspect that if this works for the DVD, it may work for the BD render as well. Wish me luck. I hope this helps.
On a side note: If all else fails, render a MASSIVE master file and use that in Toast to make a BD. Not the best option, but it will get you out the door.
Robert Land

HELP! Audio goes out of sync after export!

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