footage 32 khz - settings 48 kh: what to do?

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footage 32 khz - settings 48 kh: what to do?

Hello everyone,
So far I always had my footage delivered shot with PAL 48kHz audio.
Now for the first time I've got this big project with some 50 different PAL DVcam *32 kHz* tapes (but: only two of them are shot on 48 kHz after all).

Now there are a few things I'd like to know:

*As I captured some of this 32 kHz footage I got a warning message that my audio might get out of sync (having my capture- and projectsettings set on 48 kHz). How serious is this audio-risk? Will I severely punished when I ignore this? (the 10 minutes I captured looked fine so far).
*When this probability of audio-trouble is high indeed (as I expect it to be), should I put both my capture -and project settings on 32 kHz then?
*If so, how should I do that? In both my capture and project settings so far I could only find 48 kHz presets.
*With 2 tapes shot on 48 KHz-audio and preferring to work with 48 kHz anyway, wouldn't it be possible to just capture the whole lot with 48 kHz-settings on the Mac and then somehow export the 32 kHz audio-parts (to Sound Track Pro for instance) and thus change them into 48 kHz audio-pieces?
*And if the answer on this last question is positive: how should I do that?

I know these are all together a lot of questions, but as I don't have too much time for this project I can't permit myself to start experimenting. So I hope you people might have some useful answers or suggestions how to tackle this problem...

Best regards,
Robbie V., Amsterdam, the Netherlands

Mac Pro, Mac OS X (10.4.7)

Posted on Sep 14, 2007 8:00 AM

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Answer 1

Links

Level 4

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Sep 14, 2007 1:53 PM in response to Applerobbie

To prevent sync problems, don't capture 32KHz content with a 48KHz preset.
The answer is to create a 32KHz preset,
Convert the audio to 48KHz after you capture with Soundtrack or export via QuickTime Player.
Look here:

http://discussions.apple.com/thread.jspa?threadID=1129682&tstart=60

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Answer 2

Applerobbie Author

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Sep 15, 2007 8:02 AM in response to Links

Thanks very much for your reply. I just read the thread and it was very helpful.
One last question: Is it possible then to export the video AND the audio together, finding an export-setting that keeps the DVcam-video as it was, only changing the audio from 32 to 48? Or will it be inevitable to have an 'extra' audio-clip for every clip I captured in the first place in the project.

Best regards,
Robbie V., Amsterdam, the Netherlands

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Answer 3

Links

Level 4

1,780 points

Sep 15, 2007 11:15 AM in response to Applerobbie

You will capture the tapes that are at 48KHz with a normal DVCAM 48KHz preset.
You make a "duplicate" of that preset and change the audio to 32KHz (leave the video settings as they are) and *use that new preset* for capturing the other DVCAM tapes, both the video and the audio.
Notice when you choose the 32KHz setting that it will be 16 bit, though the tapes are 12 bit, this won't be a problem.

Bring the new clips with 32KHz into your FCP 48KHz timeline then highlight the audio track and "Export " using QuickTime conversion.
In the "Format" drop down choose AIFF, then choose "options" and change the Rate to 48KHz.

Bring the new 48KHz audio clip into you bin and drop it into the timeline, making sure you match the begining of the new audio clip with the old one.
Then turn off, or delete the 32KHz clip.
Or, "Send to" Soundtrack Pro Audio File Project" and convert there.

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Answer 4

Applerobbie Author

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Sep 17, 2007 12:54 PM in response to Links

"You make a "duplicate" of that preset and change the audio to 32KHz"
I tried to do that but I couldn't find the possibility to make this duplicate. How should I do this?

"Then turn off, or delete the 32KHz clip."
Is it possible then to delete the 32 kHz audio and leave the video intact?
On the timeline it is of course, but I'd like to get rid of the 32 kHz audio then on media file level.

Thanks very much so far.

Robbie V., Amsterdam, the Netherlands

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Answer 5

Links

Level 4

1,780 points

Sep 17, 2007 2:17 PM in response to Applerobbie

From the FCP menu choose audio/video settings
Open the "Capture Preset" tab, choose your DVCAM capture preset, click "duplicate" (or copy) and change the audio setting to 32 KHz 16bit,in the format drop-down.
Change the name and description of this new setting to your liking.
Click OK.
Select this new setting as your capture preset for the tapes that are recorded with 32KHz audio.

Once you satisfied that your converted 48KHz clips are in sync, go ahead and delete the 32KHz file from your timeline.
You need to "unlink" the audio from your video track first, as they are captured linked together.

Look closely at the name of your clip, if it is "linked" to the audio track you will see that the name is underlined.
This means that when you edit, the video and audio are edited together.
To enable you to delete the 32 KHz track independent of the video, it has to be "unlinked".
To do this, select a clip in the timeline.
Click "command" + "l" (the letter "el" not "i") and you will see that the underline on the video clip is gone.
You can now delete the audio without affecting the video.

To now "link" your new 48KHz audio to your video, shift click to select both, then click "command" + "l" on you keyboard.
Now when you edit, both the audio and video are edited together.

BTW you have posted the same problem twice on this forum.
That is not a "good thing" to do.

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Answer 6

Links

Level 4

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Sep 17, 2007 2:45 PM in response to Links

I've tested this in FCP 5.1.4.
If you are capturing vis Firewire the following applies.

Choose your PAL capture setting.
Choose "duplicate" (this prevents making unwanted changes to you current setting)
The "Digitizer" should be "DV Video"
The QuickTime Audio Setting" should be "DV Audio"
The 32KHz 16 bit stting is selectable.
If you are capturing via component using a video card, the 32KHz setting will NOT be available.

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Answer 7

Applerobbie Author

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Sep 17, 2007 2:48 PM in response to Links

Thanks very much for your answer.
And I didn't mean to post the same problem twice, I'm really sorry about that.
It's just that every answer seems to create another problem, but you're right that the postings are much alike.
Anyway, the basic problem seems to be that on my capture preset dropdown-menu there's no 32 kHz audio-option (only 44.1, 48 and 96). On this other thread someone already suggested to try another deck, as he has the same FCP version (5.1) but still the possibility of 32 kHz in the dropdown menu.
By the way: do you know how I should turn to the administrator? I'd like to reward your reply but as soon as I try that I get an error message.

Thanks again.

Robbie V., Amsterdam, the Netherlands

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Answer 8

Links

Level 4

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Sep 17, 2007 5:16 PM in response to Applerobbie

Do you have FCP 5.1 or updated to 5.1.4?
I tested it in FCP 5.1.4
Exactly what deck are you capturing from, and how?
Component are Firewire?

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Answer 9

Links

Level 4

1,780 points

Sep 17, 2007 5:54 PM in response to Applerobbie

By the way: do you know how I should turn to the administrator? I'd like to reward your reply but as soon as I try that I get an error message.

This is happening to everyone.
There's are feedback discussions here if you care to add your name.

http://discussions.apple.com/thread.jspa?messageID=5373657
and here
http://discussions.apple.com/thread.jspa?threadID=1134242&tstart=0
and here
http://discussions.apple.com/thread.jspa?threadID=1135031&tstart=0

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Answer 10

Applerobbie Author

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Sep 17, 2007 6:26 PM in response to Links

In the meantime my problem is solved! After all it had to do with the deck. I had this SONY A1 connected with firewire and my guess is that I had switched it on at the wrong moment. As I started up FCP after switching on the deck suddenly the option 32 kHz-16 appeared.
I followed your instructions and now I have aiff audioduplicates for every clip I had captured.
Now there 's only one problem left and, as it is workflow-related, maybe I should open a new thread in this case.
That is: I like to have my captured clips and new aiff-files linked somehow before putting them all in the timeline. I'm used to making relatively small selections out of the sourcebin/viewerwindow and F10 them into the timeline. If I do so now, I could select only the video, do F10 and then add the aiff-part under my videotrack. But as the aiff-files don't have the same source timecode this would take an awful lot of time.
Isn't it possible f.i. to link my source clips with the aiff *on the timeline* -as you described- but then exporting both the video and the aiff audio to create brand new source clips?
It would only be a matter then of choosing the right settings in order not to loose video-quality.
Have you any ideas about this?
You should know that this will be a huge project with almost 50 hours of footage and lots, lots of clips. So I think it's maybe better to invest some time now instead of completely losing track at the time my deadline is there...
Many thanks for your observations and suggestions so far.
Robbie V., Amsterdam, the Netherlands

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Answer 11

Links

Level 4

1,780 points

Sep 17, 2007 6:47 PM in response to Applerobbie

Isn't it possible f.i. to link my source clips with the aiff on the timeline -as you described- but then exporting both the video and the aiff audio to create brand new source clips?

Certainly if you want to take the time and have the hard drive space you could export your clips if that would make you happy.

From the file menu choose:
Export > quicktime movie
Setting > Current Settings
Include > Audio and Video
Make Movie Self Contained

This won't alter your audio or video in any way.

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Answer 12

Applerobbie Author

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Sep 17, 2007 6:52 PM in response to Links

Thanks again, I'll start with footage of one tape and then see if that method works fine.
I owe you a few 'solved's in the meanwhile....
Greetings,
Robbie V., Amsterdam, the Netherlands

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