Audio Synch

I converted a VOB file to DV using MPEG Streamclip and then imported into FCE. The audio is now out of synch with the video. HELP! THanks!

Did you use these settings in MPEG Streamclip ... and did you import the DV video into a DV-NTSC sequence in FCE (what was the Easy Setup that you had in FCE when you created the sequence you imported your video into? was it DV-NTSC or was it DV-NTSC 32KHz)
Is the audio out of sync always, or does it start out ok and then drift out of sync over time?

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Audio synch issues in QT

My project displays fine in PE8. No audio synch issues in the preview. After outputting the project to a quicktime movie withe LAN setting the audio becomes seems to run faster than the video, becoming more and more out of synch as the movie plays. Any ideas what might cause such an issue?

The Stream info in MPEG streamclip for files from both cameras gives me this info:
Bitrate: 30.31 Mpbs
Video Tracks:
DV/DVCPRO - NTSC, 720x480, 16:9, 29.9699999999999 fps, 28.77 Mbps
Audio Tracks:
16-Bit Little Endian mono, 48 khz, 768 kbps
I don't know if this helps.

What does "Audio Synch" in Creative Media Source actually

Does Audio Synch
. Make the data on the micro the same as the data on Media Source? I am kinda vague about the whole "synch" concept. I know WMP 0 has it too. I would like to try it, just for fun, but am not willing to jeapordize the 600 or so songs I now have on my micro.

Audio sync syncs the audio files between your player and your computer. You aren't gonna lose your files by synching .....

QT 7.0.4 losing audio synch

Since installing QT 7.0.4 my mp4 and m4v files which played perfectly with 7.0.3 lose audio synch. The sound starts out perfectly synched with the lips and within 30 seconds is way out. If I click pause and then play from that point the sound starts out in synch again and is out gradually (as before) within 30 seconds. As said, these were perfectly healthy files before this update.
Also, these files play fine on VLC and do not lose synch. BUT I'd rather use QT.
Of course, Tiger 10.4.4 downloaded at the same time so it may be the Op Sys.
I have tried reinstalling QT but nothing changes. I've tried to find 7.0.3 to return to that version, but the download does not seem to be available any longer.
I am playing these files on a MacMini from the local drive.
Does any one have any suggestions.
Thanks,
iMac G5 & iBook G4 & MacMini Mac OS X (10.4.4)

Re-install of v7.0.1 and updating to v7.0.3 approach works. Had to do this recently because v7.0.4 "Movie to MPEG4" conversion to ipod compatible MPEG4 files would not sync using iTunes v6.0.2 but would sync when using QT v7.0.3 Pro software. Not sure if the file produced is actually incompatible of if some tag or header data was changed and iTunes refuses to deal with it.

AUDIO SYNCH PROBLEMS

I have never had an audio synch problem 'til now. I am running 10.5.7 on a 2.8 GHz Intel Core 2 Duo 4 GB ram, 24" imac.
iMovie 6.0.4
I have a 50 minute heavily edited project with many transitions, etc.. I have no problem with the footage downloaded from my Sony HD camcorder. I even saved many individual frames as pictures and changed them to the beat of the music in the timeline and all worked perfectly. BUT, my problem is with the "video trailers" I slipped into the timeline. The audio slips when I play back in the timeline AND when burned to DVD. BUT, it does not slip in the same place every time I preview it. If I scrub the playhead back over some of the bad scenes and play them again, they are in synch. IT KEEPS CHANGING..... When I export to a desktop movie to review - the synch problem is there and some of the audio is missing. This only happens on "movie trailers" I have downloaded.
I can't figure out why it keeps changing in the timeline and then correcting itself when I back up and play it over again. I AM GOING CRAZY........
Thanks in advance for any suggestions.
Wally

Thanks for the reply but my problem is not with iDVD - it is with iMovie - when I add "trailers" to it they go in and out of synch at different places everytime I review it before moving on. When I scrub back over the problem area and then play again, they are perfect for one time and then I try again and they are not synched. The problem is in iMovie.
Thanks,
Wally

Audio synch problem

I have a 1 1/2 hr program in HDV that I'm having audio synch problems with during export. All my frame rates for my clips are the same as well as my audio sampling rates. It will start fine, then be slightly off and by the end of the program that audio is behind by about 3 seconds. I've tried all formats, reference file, self-contained, Anamorphic DV and still no luck. Any ideas?

Exporting Quicktime movie...current settings, video and audio....just uncompressed right out of FCP.

Audio synch problem from 24 to 29.97

I am working for a tv show that is having a major audio synch problem.
We send our mix to an external sound house for our pro-tools mix. They request the file to be 29.97, though our timeline is 24. In turn, we export a 24 time line, re-import to an 29.97 timeline and than re-export at 29.97 with a time code burn. They export the mix, using a sound compressor that converts the mix to a 24 fps synch, we send them a 24 frame export that they can check it againest on their end in Final Cut Pro. For them, both the opening and end two-pop lines up. When we recieve the mix back however, and bring it onto our timeline, it is always 24 frames ahead of the picture. We can't fiugre out why.
I know this all sound very confusing.
Below is our export and timeline settings:
OUR TIME-LINE\EXPORT SETTINGS:
1st Time Line:
FS: 1280x1080
FPS: 24
Compressor: DVCPRO HD 1080i60
Aud Rate: 48.0 KHz
Aud Format: 32-bit Floating Point
1st Export:
FPS: 24
DV\DVCPRO - NTSC
Compressor: DVCPRO HD 1080i60
Aud Rate: 48.0 KHz
Aud Format: 32-bit Floating Point
Data Rate: 2.9MB/sec
2nd Time Line:
FPS: 29.97
Compressor: DV/DVCPRO - NTSC
Aud Rate: 48.0 KHz
Aud Format: 32-bit Floating Point
2nd Export:
FPS: 29.97
Compressor: DV\DVCPRO - NTSC
Aud Rate: 48.0 KHz
Aud Format: 16-bit Integer
Data Rate: 3.6 MB/sec
AUDIO MIX SETTINGS:
Data Rate: 140.6 K/sec
Aud Rate: 48.0 KHz
Aud Format: 24-bit Integer
Total Out: The audio is exactly 24 frames ahead of the video by the end of the clip
We shot on a Panasonic HDX900
Can anybody think why this might be happening?

ProTools mixes 24fps...and 23.98, which SHOULD be the case here. There is NO REASON why they should want a 29.97 mix, nor should they mix at that rate...because you are not working at that rate nor delivering that rate...are you?
Your sequence settings confuse me. DVCPRO HD 1080i60 runs at 59.94. You can get it to 23.98 with a little work...but you indicate 24fps. Is that SOLID 24fps? Not 23.98? If so...that is a major issue. You should not be working at 24fps. 23.98 is the frame rate...
Still...if you are working at 23.98 and delivering a 23.98 master, the audio guy needs to mix at 23.98. ProTools is capable of 23.98. If they can't do that, then I'd suggest finding another mixer.
Shane

HDV audio synch error upon capture

I'm having issues with audio synch capture issues.
I set the project settings for HDV 1080i30(60i) - I accepted the defaults of preset, I specified Canon in Device Control
I captured two clips...each ~ 20 minutes in length. Both have audio synch issues.
Both clips captured footage that included a blank spot(s) in the tape...ie. the timecode was reset when I removed the tape from the camcorder during the trip.
Both captured clips have odd bright red video footage inserted for a second or two (is that an error signal?) in various places.
Both show the following error message:
F;\Video\Project1\Clip 02.mgegError in MPEG stream detected around frame 3502
(there are ~20 such error messages in the Events panel)
Suggestions?
Thanks, in advance.
- Mike -
Premiere Pro CS3
HV30 Canon camcorder (mini DV tape)
Firewire link for capture
dedicated second internal drive for video assets
Vista Home Premium 2 Gb RAM, 2 500Gb internal drives...lots of room left
HP8187 DesktopE6750 Intel Core 2 Duo
NVIDIA GeForce 8500GT
HP LP3065c 30 inch LCD monitor (2560x1600)

Harm,I
Thanks for your continued advice.
Doing the resiz in camera makes a lot of sense. My only concern is not wanting to do my edits and titling for a large project twice (i.e. once for DVD version and later for a BR version). I know there's some feature of Prem. that allows substitute clips...work on low-res & replace with high-res...but I'm a rookie on that front. Is there a term for that?
As mentioned earlier, I was willing to try doing a manual capture process in order to work around the timecode breaks. But I'm running into issues, again. The first clip ~2 minutes - no problem. The second clip ~35 minutes - big problems...error reports of dropped frames...must be on portions of the tape other than my timecode breaks. Also, the thing can't complete the Conforming Clip 02b.mpeg process. It starts...makes progress...grinds to a halt mid-way...and renders Prem "Non Responsive".
It's feeling like this HDV full res process has lots of gotcha's. I'm wondering how folks get through it.
- Mike -

12 bit audio synch issues

Hey all. I have a queation regarding 12 bit audio synch problems. I have digitized a tape recorded with 12 bit audio and am just now coming into video/audio synch issues and was wondering if anyone might have a workflow suggestion. Soecific questions are -
1 - Can I export the troubled clips to quicktime/ resample them at 16 bit and reimport?
2 - Some of the clips I already have edited and are in synch, do I need to correct them as well or will final cut do that on export?
3 - If I get a 12 bit/16 bit mixed bag on my timeline, can I export the mix to 2 track and convert before exporting it to compression?
ANy suggestions on how to work through this would be appreciated. I seem to have a lot of people coming to me with this setting and would like to know of any viable workflow solutions.
Thanks

1. Yes. Quicktime Pro, iTunes or third party audio editing software such as Peak can resample to 48khz/ 16 bit.
2. It would be best if you can get everything in the timeline to be 48khz/16 bit.
3. See #2.
Dope slap these fools who bring you 32khz stuff. Charge them MUCHO extra for your time.
x

IPad mini audio synch

all of my 'sounds' i.e. alerts, alarms and audio (even the on/off click) are all out of synch. The audio is about 3-6 seconds behind the function. And while it's not particularly annoying for alarms, alerts and such - it's annoying as heck when you're watching a video and the audio doesn't match up with the mouth movement. Any suggestions? I checked my other 2 iPads and the audio synch on point.
Thanks

You can make a Genius Bar appointment at your nearest Apple Store and do an out-of-warranty replacement (will be about 50% of the cost of a new model).
You can go to a 3rd party repair site in your area and have them replace the jack (this route will preclude you from ever using the first option I posted).
You can use an online 3rd party repair service such as http://www.iresq.com or Google for similar sites (this route will preclude you from ever using the first option I posted).
You can purchase the part and do it yourself. At http://www.ifixit.com they have videos showing how to do this and they sell 3rd party and salvaged parts (this route will preclude you from ever using the first option I posted).

URGENT - How accurate is Audio Synch on Computer Monitor?

Hi,
Due the temporary lack of Digital-to-Analog convertor for my Blackmagic HDLink card, I've been unable to monitor audio while watching video on my external monitor. So instead I've been watching the computer monitor, and listening thru built-in audio.
(I should explain that I am listening to a mixed down audio track, so I dont have the original audio clips in the timeline to see the synch indicators. I'm doing this all by eye and ear)
I have a two-beep at the beginning of the long sequence, which I SEE and HEAR at the same time. But I've been told by someone I trust not to trust the synch using this method. My sequence is 83min if that makes any difference.
The reason this came up is that after adjusting the synch on a bunch of shots a few weeks ago, I went back and checked them again and they are off a few frames....
I've got a M-Audio Flying Cow Digital to Analog convertor on the way, but the meatime am borrowing a Home Theatre amp with Digial In that should allow me to monitor from the Decklink, but would really like to know if all my synch work is unreliable.
thank you !!!

Mathew,
You shouldn't have a problem using built-in audio if you're monitoring on the computer monitor. Built-in is low enough latency that it shouldn't matter. As you say, they appear to be in sync. If you were monitoring video through your Decklink, and audio through the built-in, then I would suspect a problem because the video D to A conversion introduces video latency.
Why a sequence would go a bit out of sync a few weeks later after making no changes is a mystery. Unless you changed something else in your system that could have changed the buffer settings for built-in audio? Just a longshot.

Audio Synch from Color back to FCP

I am sending a short sequence with 8 clips or so to color, adding a color fx to half of the clips, rendering all of the clips, inc. the ones without an effect added, and sending back to fcp. When I open the new color sequence, the audio is out of synch by a few seconds. Any ideas why?

Any ideas why?
Not really, but it has been a continuing problem. You're sure it is the audio that is out of sync, and not the video? (Just checking) There are a lot of complaints, especially with HDV about frame drift.
Best solution is to lift the audio from the previous timeline and paste it into the graded (from COLOR) sequence. Even when a mixed stereo final is part of the workflow, it almost never comes back the same, so most, if not all, users avoid sending and retrieving audio as part of the COLOR roundtrip. In my experience, even if it somehow mysteriously lands back in sync, the pan settings are all slammed over to one side.
So we all just pull the original audio forward from the previous sequence and Apple can go onward in its delusional mindstate.
jPo

Strange Audio Synch problem

I've been supplied with a movie (from an HD master) in .mpg format (for ease of size) to which I need to synch an audio track for a Blu-ray release.
When I open the file in MPEG Streamclip it gives the frame rate as 23.976. However, when I import this same clip into FCP it gives the vid rate at 25fps, with no audio (but it's there if I open it in Quicktime).
If I convert the .mpg to ProRes I the get the audio in FCP, but the running time is altered - even though I've not changed anything, making it useless to synch to.
Example:
.mpg file = 01:35:49:20
ProRes conversion via MPEG Streamclip = 01:35:44:00
I've also been supplied the same file at 25fps (for the DVD release). The same problems occur with this too.
So my question is, how do I synch a new audio track to the movie and ensure everything is kept in synch?
Would I be better off exporting from MPEG Streamclip to another format?

When you open this file up in Quicktime, what does it say the frame rate is? Because it sounds like it is 25fps, so you need to set MPEG STREAMCLIP to convert it to 25fps.
Shane

2 camera audio synch method?

Hi...I've got video footage from 2 cameras and want to only use the audio from one of them. How can I synch up the 2nd video to the audio file and intermittently use some of it's footage and switch back and forth between the two views?

Len,
You will probably find it easiest if you put Video A in the timeline on Track v1 (with audio a1/a2) and then put Video B on top of it on timeline Track v2 (with audio a3/a4). Then, using sound as your guide, move one of the videos to the left or right in the timeline to line it up with the other video. It's fussy, meaning you do a bunch of trial & error, but it can be done. Listen closely, your ears will tell you when the sound tracks are lined up.
Once you have them sync'd, put a marker on the Timeline and on each clip (v1, v2, a1, a2, a3, a4) all at the very same location. That way if you ever accidently bump them out of alignment, you have a quick way to realign them. Then just mute the audio for video B (tracks a3/a4). After that, you can edit to your heart's content to switch back & forth between the two video tracks.

IMovie and MD audio synch drift problem

I've got a movie of a basketball game. I recorded voice over commentary on a Minidisc player, imported it into iMovie and synched it with the video. The commentary was synched perfectly, from beginning to end. I split the video clip of the game where the first basket was scored, and I used 'Music Video' titles to keep running stats on the screen, which splits the movie into 10 second (or shorter) clips, but shouldn't have any impact on it's length or alter the position of the video in the timeline (which I locked the audio to anyway when I synched it). Well, once I started doing the titles, the video only stays in synch for the first 10 minutes and then starts to drift. By the end of the 40 minute game it is out of synch by almost 5 seconds. Any ideas?

The audio was synchronized. I used this method because the voice over was recorded long after the original footage had been shot and imported into iMovie for my project. I figured out the problem was that to keep the music video stats onscreen continuously by making numerous 10 second clips, Imovie is consuming at least a frame or two to do so, and over the course of the game that led to the voiceover falling out of synch. I decided instead to just have 1 title briefly appear after each play the subject player makes....few enough title clips, the audio remained synched no problem. Thanks for your suggestions!

Audio Synch

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