av extension

Posted by Steve Denn 
av extension
June 26, 2006 06:51PM
FCP 4.5, G5 dual 2.5, OSX 10.3.9, 4 gigs of Ram, Apple xServe Raid 3.5T, AJA LD.

After digitizing some footage today. I noticed in the raid & in the folder containing the QuickTime file, there were two more files with the same name but with the extension (example) Car Chase-av
Car Chase-av-1 & Car Chase-av-2.

Trashed Prefs & switched to the other half of the Raid.
Still happens.

Anyone else come across this problem?


TD/Production Editor
WJBK FOX2 Detroit
Re: av extension
June 26, 2006 08:58PM
Surprised this is happening with a raid, but it's possible.

How big are those files? I'll guess 2 GB each (at least the first 2). If so, it's because the raid is not formatted Mac OS Extended, and thus there is a 2 GB file size limit on all files. Your system will be able to deal with it (with extra overhead), but it's best not to have things like this. Do "get info" on the drive and see what it says for format.

Re: av extension
June 26, 2006 09:42PM
This is from the (coming soon, really..) FCP FAQ

Q. I'm capturing video, but all my files are coming up as 2GB, and I'm getting weird file names with a long string of numbers attached to them / with the extension .av.

Most likely answer :
A. Check the formatting of the drive you're capturing to. It is likely that it's misformatted. You must format a drive to Mac OS Extended before you use it for capturing.

To do this, open Disk Utility (Your main Hard Drive > Applications > Utilities > Disk Utility) and select the name of the capture drive in the left hand panel. Click on the ?Erase? tab (don?t panic, this does not erase the drive, yet) and check that the volume format is Mac OS Extended. If it is not Mac OS Extended (preferably not ?Journaled?) you will have to reformat the drive. This means erasing all the information that is currently on the drive. If this is what you want to do, just select the correct format and press Erase.

Other things that it could be :
? Early versions of Mac OS 9 did not recognise files larger than 2GB. If you need to stay in OS9, upgrade to 9.2.2 for access to larger files.
? Because some drive formats do not recognise files over 2GB, there is an option in FCP to break captured or exported files into 2GB chunks. It could be that you have this option enabled. In FCP go to System Settings > Scratch Disks > and make sure that ?Limit Capture / Export File Segment Size? is not ticked. Note that the default is 2000MB, or 2GB.
Re: av extension
June 27, 2006 12:29PM

Our raid is formatted Mac OS Extended.
This just started yesterday. Our system has been up & running for almost two years now. all files I captured yesterday are 1.9gig in file size.

Re: av extension
June 27, 2006 02:01PM
Steve, see Jude's last item about Scratch Disk settings. I don't have anything better to suggest.

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