Sync Problem Pro Tools Audio to FCP

Hi!
I did a sound edit for a PAL FCP project in Pro Tools, exported it, and when the .aif is imported back into the FCP timeline, audio drifts out of sync slowly becoming earlier than picture.
By the end of the 17 min film. we are about a second/second and a half ahead of picture.
Any ideas or heal are greatly appreciated. Thanks!!
TG-

make sure the aif file is 48khz not 44.1khz.
x

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I would recommend the M-Tron Pro and VSE both from G force for strings , flutes , etc. http://www.gforcesoftware.com/index.php
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I usually give my Audio Guy a 2-pop (one frame tone hit) at the 2 second before picture mark..just like you see with film leader. So at 59:58:00 I have the one frame pop. I usually include an 8 second visual countdown at the head for reference.
Same with the end...two seconds after picture a 2 pop...nad flashing the number 2 one more time....visual reference.
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'onglet' - great, my favorite when visiting restaurants in France!
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Well 2 days later and hours on the phone with Apple tech support Senior Advisors, and problem still not solved. HELP.
Everything works fine in FCP X, but when I create the QuickTime movie, it is way out of sync (by many seconds).
We have isolated the problem to audio files that I am exporting to Pro Tools, processing, and then importing back into FCP X. I can create a QuickTime movie with the original video/audio and it is fine.
Information
The original video came from Canon HF M40 camcorder: AVCHD (using MPEG4-AVC / H.264 compression codec), MTS format. Audio is 48kHz, 24 bits.
I used ClipWrap to rewrap the video into ProRes 422 and decompress the audio and save as LPCM.
I simply provide this FYI. As I said earlier, the original video works fine and the resulting QuickTime movie works fine. So the original files imported into the FCP project are not the problem.
The creation of the problem audio occurs as follows:
- Detach the original audio from the original video, and export
- Import this audio into a 48.0 kHz/16-bit Pro Tools HD session and EQ/limit the audio
- Import the resulting audio into FCP X (exact same length file, audio waveforms aligned with the original audio).
This audio works fine in FCP. It is in sync with the video, everything looks great.
I ran Pro Tools at 16-bits because a senior advisor told me FCP runs at 16-bits but does not convert imported stand-alone audio (as opposed to combined video/audio) to 16-bits; thus the Pro Tools session had to be at 16-bits. I changed from 24-bits to 16-bits, and this didn't solve the problem. (FYI, when Pro Tools imports the original audio exported from FCP, it says the audio is 24-bits, not 16-bits).
What is the problem?
The basic question is why does this audio cause QuickTime a problem?
Something is going on in the conversion to the QT movie. In FCP X, I don't have a way to play with the conversion variables except to set "Video and Audio" and "Use current settings" (which is ProRes 422).
The only difference I see between the original audio and the Pro Tools audio is that the original audio is stereo and Pro Tools works with dual mono files (L & R). The mono files work fine in FCP and I can't imagine why QT would have a problem with these, but I haven't tried converting the files to stereo before importing into FCP.
I should also mention that I selected the stabilization and roll correction algorithms in FCP. I assume these don't create problems in QT. I mention this because I didn't use them when I tested making a QT movie with the original video/audio files.
FCP and Pro Tools are used together all the time to do exactly what I am doing......improve the sound of the original audio. They are the premier video and audio professional programs. Of course, the final product is often not a QuickTime movie, but many times it is a QT movie.
What the heck is going on???
HELP.

(1) It is immediately out of sync. It even appears to be speeded up to me initially, but this is subjective. But it is clearly out of sync throughout, not a gradual drift.
(2) When I create the audio files in the Pro Tools session, the files are automatically stored in the audio folder of the Pro Tools session. So I don't actually have to go through an export process. I just close the Pro Tools session, then open FCP X and import the audio from the Pro Tools folder.
I'm not sure what additional specifications you seek, other than:
- wav files
- sample rate = 48 kHz
- Bit rate = 16-bits (and earlier I used 24-bits)
- Files are dual mono, rather than stereo (name_01.L.wav, name_01.R.wav). As I mentioned above, I have not yet tried converting these to stereo before importing into FCP, to see if dual mono causes an issue with QT. It does not cause a problem in FCP. I will try this today if we don't solve the problem.
(3) I can upload a portion of the audio to a server and send you a link to the file so you can download it. Is there a way to private message on the forum so I can get an email address to send you the link?
(4) The original video came from Canon HF M40 camcorder: AVCHD (using MPEG4-AVC / H.264 compression codec), MTS format. Audio is 48 kHz, 24 bits.
I used ClipWrap to rewrap the video into ProRes 422 and decompress the audio and save as LPCM.
The FCP Project was set up at:
- Starting time code - 01.00.00.00
- Format - 1080p
- Resolution - 1920 x 1080
- Frame rate - 29.97p
- Audio channels - stereo
- Sample rate - 48 kHz
- Rendering format - Apple ProRes 422

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Hi all,
I've been having so much fun agonizing over this issue I thought I'd let some other people join in the fun. Okay, really, I've got a bounced AIFF file from Pro Tools that doesn't stay in sync when it goes to FCP.
There's a lot of information to cover here, so bear with me.
1) The project is a 123-minute feature. It's made up of 9 separate sequences (which correspond to nine different Pro Tools projects). This problem only occurs on 1 of these 9 sequences. Over the course of about 14 minutes, the audio is about 20 frames shorter than the video. (I know what you're thinking, but there's no pulldown or pullup anywhere. I've checked this extensively.)
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smack5099 wrote:
6) Like I said everything is 24fps/48K. Except that this AIFF file, when it goes to FCP, FCP thinks it's 30fps drop-frame. All the other bounced AIFF files go into FCP as pure 24. This one, despite the fact that I'm doing nothing difference, shows up as 30fps drop-frame in FCP. (Again, this is despite the fact that it's in pure 24fps in Pro Tools.)
I don't know why FCP does this, but it does consider all audio-only clips to be 30fps.
For what it's worth, it appears that I can bounce to a Quicktime movie, and that audio will sync up fine, but, well, I'm just not satisfied with using that workaround permanently.
Why? Seems like a perfect solution for you.

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Last edited by sultanoswing (2013-11-13 06:15:11)

Sync problem converting videos with SU

Hi there. I have owned my Creative Zen Vision:m 30gig player for about 2 weeks now. So far I have really come to love this device. I have learned how to put album art on all my favourite albums with ?Album Art Downloader? and I am using Media Monkey to manage and sync my mp3 files from my pc to my Vision:m. I have even loaded all my photos onto the player and bought the accessories pack so that I can hook it up to my television ? it works perfectly.
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I have a video, perhaps a little morbid, where the sync problem is very obvious after you have converted it with super, here is the link http://video.google.com/videoplay?docid=-7233445036972827652
I use a plugin for Firefox to download videos from Youtube, Google video, etc. called ?Video Downloader?, here?s the link
https://addons.mozilla.org/firefox/2390/
The settings I use for Super are the following:
Output Container: Avi (For Pocket Pc)
Output Video Codec: Mpeg4
Video Scale Size: 320*240
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Bitrate: 336
Hi Quality: ?Checked?
Stretch It: ?Checked?
Sampling Freq: 22050
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Ok if you manage to download the clip from google video (easy) AND convert with Super into a format fitting for the Zen Vision:m without the sync problem? well my joy will break any ?happy-meter? out there
Ps. I did actually find a way to fix the sync problem, I checked the ?Directshow? for the ffmpeg but the picture was sort of lagging and looking REALLY ugly so that actually created a problem much worse than the previous one.
Thank you for your time and patience

I am not sure I can help you but I do have one pice of information. The sync problems arise from converting to the wrong frame rate. If you can choose the frame rate for the videos you convert to then you can test different rates and find the right rate. Keep in mind that there is currently no way to determine the approiate frome rate without teting it.
[Edit]
BTW is that MS-mpeg4-v or MS-mpeg4-v2?Message Edited by Edward-Nardella on 2-26-200602:08 PM

Optimal Hard Drive Configuration for Premiere Pro CS5 and Pro Tools

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Audio sync problem: exporting from FCP to Pro tools or soundtrack pro

--------------------------------------------------------------------------------
Final Cut Pro sound export for mastering.....sync problem
Hey,
I'm editing a 30 minute film and I have done most of the sound edit in FCP and Soundtrack pro and I want to now bring all the sound into pro tools to master the sound but every time i export sound into pro tools it seems to stretch by two or three seconds.
I have tried OMF, AIFF, XML, and Quicktime audio file sut to no avail!!!!
There are 50 tracks in the file so it is quiet large. It's not that there are handles of the file also as when I sync the file with the audio track with the video it syncs in one place but it is still out of sync in another.........It's as if the audio has been stretched!?!
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Keith

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falcoy wrote:
Has anyone had any experience importing audio tracks into Logic 8 that were originally done in another studio on a P.C.(YUK!) IN Pro Tools.
YUK?
Hmmm... even a beginning PC DAW user would be smart enough to at least take an educated guess as to the problem.
I am currently struggling with this and I am having terrible problems getting things to stay in sync. The general tempo is also a bit slower which I find really weird.
And how about pitch, if the audio is playing back at a slower tempo is the pitch slightly lower as well?
pancenter-

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Interesting point about the winter/static. The only thing is that I never had those problems before with the same setup on my older dual 1.8 PPC G5 PowerMac, through several winters.
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