16 bit audio out of sync with final DVD video

My completed movie plays back fine in iMovie HD. But when I watch the DVD on the telly, the audio drifts out of sink in the last few clips. I have checked and double checked the final clips in iMovie and there they playback fine.
The only I can think of is that I have a music clip just before these final clips. Could that be pushing them out of sync? They don't overlap, though.
I have burnt using best performance and best quality and they produce the same result.
My original input recording was 16 bit, so it can't be the typical 12 bit problem.

Try building it again but before you do so Go to the Advanced menu and delete the encoded assets. That "ghost" track may still be in the project somewhere and maybe deleting the assets and re-encoding will clean it up.

Similar Messages

Even 16 bit audio out of sync. What now?

I recorded a variety of various length video segments with my Panasonic MiniDV camcorder. I used 16-bit audio and high quality (SP) record mode. I've imported the clips into iMovie and exported them to iDVD and burned an NTSC movie DVD. The audio slowly goes out of sync with the video in each separate clip, even though I've followed the prescribed 16-bit, SP rules. As with many other posts I've read, the A/V syncs perfectly in iMovie, but not when exported to iDVD. Any thoughts? One other note, I did use a remote mic plugged into the microphone jack of the camcorder when I taped. Does anyone know if that would have affected the A/V record quality? i.e. - does the 16 bit setting on my camcorder only work with the built-in mic? There's nothing in the camcorder manual to shed light on this question. When I play back the tapes on the camcorder, it does still idicate that the audio is 16-bit, but who knows?
eMac 1Ghz G4 Mac OS X (10.3.9)

Well, here's what has fixed my audio/video sync problem. First off, I upgraded to the latest versions of iMovie and iDVD. I can't say for sure if that has any bearing on my success, but it couldn't have hurt. After upgrading, I deleted my previously imported video/audio clips because I just couldn't get them to sync properly on the longer clips. I reimported the video/audio from my miniDV camcorder, but first I went to import preferences and chose to automatically restrict the clip length to 9 minutes each. The old clips were starting to go out of sync after 10 miutes. Note that breaking clips into shorter lengths AFTER you import the video will not help. You must do it as the video is being imported. Finally I exported everything to iDVD. It ended up being a 2-hour video and the audio synced perfectly throughout. Yippee!
eMac 1Ghz G4 Mac OS X (10.3.9)

Audio out of sync with waveform

We have 3 new computers at work with Final Cut Studio on all of them. Since we got them 2 or 3 weeks ago everything has been fine except today. 2 of them all of a sudden get audio out of sync. You can tell the audio waveform is inline with the video but the audio coming through the speakers are off and get worse as the clip plays. We are recording with xd1 cameras and importing using a card reader and using the xd transfer software. The actual .mov file when played outside of FCP is fine, it's just when it's imported into FCP that the problem occurs. I even have a project that I finished 2 weeks ago, it was fine at the time but when I played it today the audio was all of a sudden off. I've checked the settings and I'm clueless as to what to do. Any suggestions?
I don't know if this makes a difference but the computer that this problem isn't happening too has been updated online. The other 2 haven't. We don't have internet access all the time. I'm thinking an update might cure the problem but we didn't have time to update it today.

I think I figured out what the problem is. We have AJA Kona card installed in the computer but we are at a temporary location so setting the FCP to AJA Kona card but listening through the regular computer speaker output is what is causing the problem. When I setup the FCP to XDCAM 1060i it works fine.

PP CS4 - 12 bit audio out of sync - bane of my existence

I've searched this forum and across the web but have not found a solution for my specific problem...
I'm running a Mac Pro OS 10.6.3 with PP CS4.2.1 The audio on these tapes is 12 bit, so my sequences are set to 32000 sample rate (I have not been able to find a "12 bit audio" setting anywhere...only a choice between 8 bit and 16 bit audio...and all my research has led me to conclude that 32000 vs 48000 sample rate is the only setting I can adjust to capture 12 bit audio. If there is a better solution, please tell me.
When I capture 1 hour tapes (as Quicktime files) from my miniDV cam, everything appears fine with audio and video sync as I watch the footage in the capture window. Once the tape is successfully captured (without any dropped frames), the audio files "conform", and when I play the 60 minute clip back in the preview window or drag it into the timeline (32000 sample rate sequence for 12 bit audio) the audio goes gradually out of sync with the video.
To be more specific, the audio is in sync at the beginning of the clip, but by the end of the 60 minute clip the audio is well out of sync (perhaps as much as a second). Does anyone have experience solving this issue? It seems to me that the problem arises from the audio being 12 bit, although I'm happy to be proven wrong.
Thank you in advance for any insight or help.

Thanks for the help, Gonzchi. Unfortunately, I have already been capturing the audio from my tapes at the correct sample rate (32000 khz) and at 16 bit depth (I've been unable to find any settings allowing me to specifically select 12 bit audio so I've been using 16 bit capture settings), and I am having these sync issues.
Because I'm using the same sample rate as the tape for capture (32000) and all the audio appears totally in sync with video as I preview during capture, I figure that somehow the problem occurs when the audio files are processed after capture from the original 12 bit source to the 16 bit output.
Does anyone have suggestions for settings or procedures I can try? Perhaps some way to adjust the audio files as they are converted?
Thanks for the help. Much appreciated.

Audio out of sync with elemental plugin, and slower than my i7!!!

Maaannn!!
I just got a PNY nvidia quadro 1800 with elemental accellerator plugin. I just transcoded 2 hours of HDV straight from premiere 4 with Adobe Media Encoder using the Elemental codec and the audio is out of sync. It plays out of sync on the Blu Ray disk, and in Encore4. The audio is perfectly synced in Premiere. I just did another project a week ago without the Elemental, using the default Main Concept encoder and the audio is perfect. I am pretty sure I have the latest version of the Elemental Accellerator because there is a button to check for updates and it says there are no updates available. Does anybody know what is wrong here?.
The transitions are getting messed up. I can see a small section with the audio synced, then the video repeats after a second throwing them out of sync. I also suspect that the Elemental accelerator does not process any faster than the default h.264 for Blu Ray encoder. I hope I did not waste my money on this nvidia quadro 1800..
Whoooaa! I just woke up and checked the transcoding time.. To transcode approximately 2 hours of HDV it took 6:35 (hr:mm) with the elemental accellerator and it took 5:09 with my i7 920 chip!! Was that nvidia card a waste of money, or what?!!! Between the slower speed and the audio out of sync, I'd say I made a BIG misteak.. Does anybody want to buy a PNY nvidia quadro 1800? it'll be on ebay very soon..
Win7 64bit, Master Collection 4, i7 2.66 Ghz, Kingston Triple Channel DDR3 1600Mhz 6Gb, ASUS P6T, PNY nvidia quadro 1800.....

Thanks Neil,
I don't think my audio interface has anything to do with it.. I am using Adobe Media Encoder for the export and the Audio interface's latency has nothing to do with it.. I see the source of the problem but not the solution.. The Elemental plugin is not working properly with the transitions in Premiere. The transitions are visibly botched and the sound is in sync for a partial second of each clip, then the video skips backward as the sound keeps playing. This happens on every clip after the transition.
Whatever you were talking about might have to do with some kind of real time export, but to where? I think Premiere might have some auto plugin delay compensation for audio tracks.. I dont think you even read my post.. My MOTU 896 Mk3 audio interface has a 128 sample buffer leaving a few milliseconds of latency, and I can set it as low as 64.. This still has nothing to do with my problem.. Thanks for your input..
I am curious to know what you thought I was capturing elemental streams and audio from my interface in real time to.. I was unaware of anything that works like that in this type of editing..
The bottom line is that my i7 chip gets the job done much faster than the quadro 1800, and that's a shame that I spent the money on the 1800.. On top of that it doesn't even work properly!!

Audio out of sync with presentation (not using full motion)

When I preview or publish a project using Captivate 5, the audio is out of sync with the presentation. I am not using any full motion recording, which I know has caused audio/video sync issues in previous versions of Captivate. The audio is slide specific, with a separate audio file for each slide. (In other words, I'm not trying to break a large audio file over many slides.) When each slide is viewed individually -- in the workstation, in the preview window, or in the published version -- the audio is synced just fine. The problem arises only when I try to watch the entire presentation (approx. 10 minutes in length). The audio gradually lags behind the visual. By about half way through the project, the visual presentation is noticably ahead of the audio. By the end, the audio is nearly 4 seconds behind the video. I cannot detect a noticeable change in pitch or speed of the audio, so if the audio is being altered in any way, the alteration is slight.
However, if I use the playback controls to advance to a single slide, the audio is fine for that slide and those immediately after, although it does gradually get off again as the project progresses. (So, for example, if I start the playback in the middle of the project, the audio will only be off by about 2 seconds by the end, rather than 4.)
I have tried various publishing options (although I don't think publishing is the problem, since this happens when I preview the project as well). I have used 2 different computers and also tried viewing the published version locally and streaming. None of these alterations seem to make a difference. By the end of the presentation, regardless of how the project is published or viewed, the audio is several seconds behind the video.
My specs:
Captivate 5
Microsoft XP OS
2 GB RAM
Publishing to .swf
Suggestions?

Hi Mukul,
Thank you very much for your careful responses. Here are the answers to the questions.
First of all, the "slow video" behavior does appear only after adding the slides mentioned in previous post.
1.    I created a “software simulation” project. It IS a capture+audio recording.
2.    Since I recorded the audio while doing screen capture, almost every slide has audio, which is not convenient to edit at all. Is there any other better way that I missed so that we can keep the audio and video at the same step while editing them? As I know so far, either insert silence or delete a little audio to one slide, the audio becomes short, but the slide duration time is still the same as before unless we change that manually which normally is not precise enough to match the audio.
3.    I tried to add the blank slides at where there is a pause of speaking and where they are close to the problem slides. Otherwise, the speaking would sound weird.
4.    Published SWF file size is 20.6 MB.
5.    I do have two externalized video files for title and end.
6.    Unfortunately, it is still slow even if it played on a different system.
And another problem comes up these days. After publication, the screen resolution is not good (like some grey ink left on screen) wherever click or type something. It did not happen before even if worked on the same computer.
I am very sorry that there are so many problems. I have been working on this for long time. The project totally drove me nuts. Hopefully you have more ideas about that.
I really appreciate your help.
Sincerely,
Linda

Audio Out of Sync with Itunes downloaded Movie

I have searched on here for an answer, but have found none, so I go to the great Mac experts. I have downloaded two shows from Itunes in the last 4 days and during playback on my G4 the audio is out of sync with the picture. This has never happened before. I just updated Itunes with the latest update about a week ago. Is anyone having this problem, and better yet, any experts out there care to weigh in on a solution? It's very annoying. Any help would be greatly appreciated.

I downloaded a 90 minute TV show and it becomes out of sync @ 51 minutes in. I have no idea why and this has never happened before. Can't seem to find any explanations online so any solutions you find would be greatly appreciated...

Audio out of sync with multi-cam

Hi *,
I searched the forum with no big success. Many people seem to have the no-audio problem with multicam. My problem is different.
I enabled the multi-cam feature in CS4.1 in the preview (source) monitor. I have 2 video tracks (1 MPG, 1 AVCHD). Both appear and are in sync. Also the audio is in sync as long as the multi-cam feature is turned off. As I turn it on and play the monitor, it's totally out of sync with the video. Totally means, that it's really about 40 minutes away.
Any ideas?
- Stefan

Any ideas?
My only recommendation is to just not use GOP-based media. It's a bad idea at it's core and issues like this are not uncommon.

Audio out of sync with video in timeline SOLVED

The audio and video are in sync when playing .MP4 video (but may apply to other video files) in the Premiere Pro viewer and Windows Media Player and VLC however, as soon as you drag the clip into the timeline it goes out of sync. Since it took so much time for me to figure out how to get around this problem I wanted to share this, ESPECIALLY For all the people who are semi Adobe Premiere noobs (with no disrespect, I fall into this category) at this and google isn't helping to figure out why this is happening I'll give you the easy fix. For all the people in this forum who are going to ask the detailed information, codecs, etc. I'll give that as well.
FOR THE NOOBS:
All the information I've read online all seems to point that the timeline sometimes doesn't like certain audio contained in the video. It conforms incorrectly, etc. Personally, it doesn't make any sense to me. Forget all that.. you just want to get on with your project.. to heck with the details, you're tired of googling. Here's the solution I found. Extracting the audio from the problematic video file outside of Adobe Premiere. I use avconv, because it's free, open source, and you won't lose audio quality. Then linking that audio with the video in Adobe Premiere.
First if you are using a windows 32 bit computer download avconv here: http://win32.libav.org/win32/
If you are using a windows 64 bit computer download avconv here: http://win32.libav.org/win64/
go to the bottom of the page and click on the newest date version. DISCLAIMER: This is open source software. It's free. I didn't make it so I'm not trying to sell you anything.
It's a zip file so you will need to use winzip or 7zip to uncompress it. You can't just click on the installer. You can uncompress and save the program wherever you want on your computer. Say you didn't pay attention and you automatically saved it in the default spot in your downloads folder. The place you'd find the program might look like this if you're on a 64 bit computer:
C:\Users\youruseraccountname\Downloads\libav-9.7-win64 If you're on a 32 bit computer it will probably look like this C:\Users\youruseraccountname\Downloads\libav-9.7-win32
Just make sure you know where it is located and copy it down in notepad. If you can't find it, do a search on your C: drive for avconv .For this forum thread we will assume you have saved avconv in the downloads folder and you're on a 64 bit computer.
Click on the Windows key on your keyboard. Type in Run and then press enter. Type in CMD and press enter. This will open up windows command line. Don't worry, it's not as scary as you think.
Now hold down the Windows key and press E. This will open up a windows explorer window for you to find the video file you are having issues with in Adobe Premiere. Once you have found the file, copy the location of the file. So.. if your file was here: c:\Users\youruseraccount\videos\yourvideo.mp4 you would see that at the top of the windows explorer in what's called the address bar. Copy that. Paste it into your notepad.
Now switch back to the windows command line window. Now I'm going to have you type a command into the windows command line but before you do I want you to understand how to type it in.
#1. Do you know the exact path (location on your computer) where you installed avconv?
#2. Did you copy the exact path (location on your computer) where you have your video file?
If so.. type in the command below but change it with the information you have above
C:\Users\youruseraccountname\Downloads\libav-9.7-win64\usr\bin\avconv.exe -i "c:\Users\youruseraccount\videos\yourvideo.mp4" -vn -qscale 1 "c:\Users\youruseraccount\videos\yourvideo.wav"
So let's break it down so you understand and help troubleshoot any issues you may have.
C:\Users\youruseraccountname\Downloads\libav-9.7-win64 this is the example location we said we installed avconv. The actual avconv.exe program is located inside that folder so the full path would be this: C:\Users\youruseraccountname\Downloads\libav-9.7-win64\usr\bin\avconv.exe
-i just tells avconv what the input file is.
"c:\Users\youruseraccount\videos\yourvideo.mp4" is the path (location on your computer) where your video file is.
-vn just tells avconv you only want to extract audio from the video
-qscale 1 just tells avconv you want the best quality
"c:\Users\youruseraccount\videos\yourvideo.wav" just tells avconv the path (location on your computer) and the name you want to give the audio file you're taking from the video. This will save the audio wav file to the path (location on your computer) where the problematic video file is saved.
Once you have the audio wav file import it into Adobe Premiere. In the timeline, unlink the audio from the mp4 (or whatever video file you have). Highlight the now unlinked mp4 audio and delete the audio. Then bring your audio wav file you created using avconv and bring it onto the timeline at the start of the video. Now link it. Hopefully that did the trick.
If you have any questions regarding the command line or installing avconv please feel free to comment and ask. I'm pretty good at windows command line and can probably help identify what the issue is.
FOR THE INFORMED PREMIERE PRO USERS:
Here are the details of the problematic video file that I had this issue with. This is from avconv:
Metadata:
    major_brand     : mp42
    minor_version   : 1
    compatible_brands: mp42mp41
    creation_time   : 2013-05-12 11:45:32
Duration: 01:58:28.24, start: 0.000000, bitrate: 3256 kb/s
    Stream #0.0(eng): Video: h264 (Constrained Baseline), yuv420p, 1280x720, 2997 kb/s, 25 fps, 25 tbr, 25 tbn
    Metadata:
      creation_time   : 2013-05-12 11:45:32
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, fltp, 256 kb/s
    Metadata:
      creation_time   : 2013-05-12 11:45:32
I don't know the type make/model video camera that was used or if it was converted before being given to me. This is just what i had to work with and the solution I found to fix it.

if you are using a windows 32 bit computer
Then you won't be using anything above Premiere Pro CS4, and this thread would be in the wrong section.
By the way, the process is significantly easier using something like Xvid4PSP, which can strip out the audio using a fairly easy to understand GUI, as wel as convert those oddball videos into something PP can handle.
http://www.videohelp.com/tools/XviD4PSP (Use version 5.)

Audio out of sync with movie....

Hi all.
I'm having a bit of a problem with iDVD 6. I have created a movie with iMovie 6 which includes a slideshow and several small video clips from my camera (all as one movie). The only sound used is some MP3's (AIFF's after placing them in the timeline) and some sound effects, no sound from the videos. Although the previews are fine in iMovie and IDVD, once they have been burnt to DVD the audio is out of sync - delayed by about 6 seconds. Any help would be greatly appreciated.

Hi.
Thanks Sue & Len for your help. As I type, my movie is now encoding using Full Quality/ Quicktime. I expect it to be in sync but the proof of the pudding will be in the burning. Fingers crossed. Len, I am running Quicktime 7.1 - The digital camera films play fine and with audio through Quicktime, it just gets 'lost' when I place the clips in iMovie. That's not a problem, the sound was horrible anyway! I assume if all works out ok that I can burn the Quicktime file using iDVD using the front-end menu's etc so it'll play on a standard DVD player?
I'll let you know the results tomorrow night.
Thanks again for your time & help. It's very much appreciated:)
Kind regards
Barney (Morat)

Audio out of sync with optical out

Hi,
I've connected audio from ATV 2 times to my receiver. My Sony television has an optical out connection so it can act as a passthru for audio to my receiver. However, it's always stereo, I can't get surround from it. Apple says it sends the same audio over HDMI and optical out. So I connected ATV directly to my receiver with the optical output. Result: I do have surround now. So I guess my Sony is at fault for not passing along surround.
This is my setup:
1) ATV -> HDMI -> Sony LCD -> optical out -> receiver
2) ATV -> optical out -> receiver
My problem:
Setup 1) gives me no surround but audio and video are synced perfectly.
Setup 2) does give me surround, but audio and video are OUT of sync.
My video is generated by Handbrake 0.9.3 and contains both AAC stereo and AC3 surround passthru.
It's strange, because if you have this audio delay problem you would think it's caused by the television because that's an extra device sitting between source and receiver.
Any ideas what is causing this problem? Is Handbrake not able to add AC3 correctly or is ATV playing sound in sync over HDMI but not in sync over optical out?
Thanks,
Jef

Thinking about this a bit more, I think I could have an idea as to what the problem is - the AppleTV firmware. I believe that there is a timing difference between HDMI and the optical audio output. Let me explain...
My AppleTV is hooked up using HDMI for video only (direct to my TV) and the optical is hooked up directly to my audio receiver. Since there is no setting in the AppleTV menu to choose the output for the audio, I have to assume that it's sending audio through BOTH the optical output and the HDMI output simultaneously. If the timing for the audio signal is slightly different, then that could cause the audio to be out of sync. Since the HDMI signal carries both audio and video, it makes sense that it would remain tightly in sync. But since the optical is separated it could, theoretically, not be synced with the video.
As I said, both of these AppleTV units have been hooked up the identical way that they are now and have never exhibited this problem until the 2.3/2.3.1 firmware updates.
I also noticed that unplugging the unit from power for 10 minutes, plugging it back in and testing the identical file that minutes earlier was out of sync, that the video and audio were much closer to being in sync. Does this make any sense?

Export Premiere CS6 (h.264) - Audio out of sync with several players...

I've had this problem before, but unfortunately it happened again.
I exported an mp4 with h.264 compression. The file plays perfectly with VLC player and everything is in sync. Of course, in Premiere (CS6) everything is in sync as well.
It is also synced correctly with Windows Media Player, as long as you don't 'scroll' or skip parts in the video. If you do that, the audio gets out of the sync...
With QuickTime it is completely out of sync. Vimeo plays it back perfectly, with YouTube it is out of sync...
How is this possible? What is causing this?
I thought that it could have had something to do with the video and audio tracks not being of the same length. I have already mastered the audio tracks into 1 track (wav) and made the same length as the video tracks, before I exported... On previous projects I have have not done that, and the audio was slightly out of sync there as well on Youtube.
What did I do wrong? Any settings I could have done wrong? Is this a bug of Premiere? What can I do to prevent this?

Yea, that sounds plausible but from the other hand, this happens only with (my) exported clips from Premiere...
When I download or watch clips from the internet that are mp4 files with h.264 compression, there is no problem. I just skip through a file of 4GB and it plays back fine. Also the clips from my camera (which are h.264 files) play back fine with everything in sync.
Also, I almost never see sync problems on YouTube.
There is something else going on here... It must be.

Atv audio out of sync with computer speakers

I stream music to my atv and to speakers connected to an airport express. My computer speakers and the speakers connected to the airport express are always in sync with one another, but the audio on the atv is always lagging behind. Any way to fix this problem??

could be simply the fact that appletv is re-processing the audio, therefore there is a slight lag.
same scenario is present when watching terrestrial TV compared to satellite TV. satellite TV is usually a second or 2 behind terrestrial due to the extra processing involved.

Iplayer audio out of sync with picture

Hi guys,
Has anyone found with iplayer that you hear the sound before people's lips move. Seems to only happen with inlayer, my downloaded movies are fine. Please is anyone able to offer a solution, it's driving me crazy!

I downloaded a 90 minute TV show and it becomes out of sync @ 51 minutes in. I have no idea why and this has never happened before. Can't seem to find any explanations online so any solutions you find would be greatly appreciated...

Burned DVD works fine in a mac but audio out of sync in a DVD player!?

The titles kinda says it all. Nearly. I've made my most complicated (for me) DVD to date. It's a concert DVD shot in anamorphic. I've edited in FCP and exported with compressor with all the appropriate settings, to mpeg 2. I've built the DVD in DVDSP with an intro from motion, motion menus etc. It previews fine and looks outstanding (if I do say so myself!). I burned the finished folder with Toast 8 ( as a UDF) and the burned DVD plays under DVD player on all my macs faultlessly. When I put the DVD in a normal DVD player, the audio is SERIOUSLY out of sync (the dancing is out of time let alone the lip sync) and the picture is stretched wide, like it's trying for 2.35.1 when it's only 16.9 or something.
Can anyone offer any suggestions? All help appreciated.
Gareth

I've edited in FCP and exported with compressor with all the appropriate settings, to mpeg 2.
Double check to make sure that you edited in Anamorphic and also encoded as 16:9 video not 4:3 - also make sure you set the Track to 16:9 Letterbox in DVD SP.
What encoding rates did you use for the video and audio? Sometimes if the rates are too high it can cause drifts.
On the audio side, did you export the FCP as self contained and make the audio AC3? Also you can try just exporting the audio as an AIF and encode that as an AC3.
How did you burn the DVD (Speed and Media used?) Sometimes bad burns/media can cause issues.
Also look at these threads
http://discussions.apple.com/thread.jspa?messageID=3131142&#3131142
http://discussions.apple.com/thread.jspa?messageID=1872235&#1872235
http://discussions.apple.com/thread.jspa?messageID=1363574&#1363574
http://discussions.apple.com/thread.jspa?messageID=1086775&#1086775

16 bit audio out of sync with final DVD video

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