What are these AV1, AV2 files?

My editor finally sent me back my project, 3 QT files, run about 10 minutes each. But below each of these are clips AV1 & AV2. I asked my editor what these are and says he sometimes gets them, but does not know why. That I should test playing without them.

I tested and the QT's wont play without them. They add 12GB that I now have to permantly archive on my hardrives. any tips appreciated.

Mac OS X (10.4.10), G5 dual 1.8 , 2mb ram

Posted on Oct 16, 2007 5:59 PM

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17 replies

Oct 16, 2007 6:25 PM in response to Studio X

And the REASON you have AV-1, AV-2 is that Fat 32 has a 2GB data limit for files, so your captured video is being broken up into 10 min chunks, each 2GB. And all these files are linked, so if you toss one, the whole file structure gets corrupt and unusable.

When you format MacOS Extended, there is NO limit, and the clips will remain as one chunk.

Shane
User uploaded file

Oct 16, 2007 7:38 PM in response to Shane Ross

Thanks guys!
I'm pulling my hair out.
Here is what happened:
I captured to an external FW drive, they are all formatted Mac OS Extended.
but.......

I then copied the raw footage to a new USB external, mobile to send to the editor --not paying attention to formatting, that is
MS-DOS File System (FAT32)

That is the culprit then?
If I format that external, I'll be ok in future?

Oct 16, 2007 7:58 PM in response to kevs55

You can bring the file(s) back into FCP then export it back out to a Mac OS Extended drive. Give it a new name and make it self contained. This should recombine all the segments into one file again.

Get it out of your head these files are extra. They ARE the file. It is just the version you have has been segmented and the idea noted above may put it back into one file.

Reformatting the drive will prevent this from happening again. Just make sure you are not trying to edit from the USB drive. USB is not recommended for that purpose.

x

Oct 17, 2007 9:16 AM in response to Studio X

thanks Studio
I only have FCExpress 3.0, can that work?

This was done by my editor who has studio pro.
I don't know how to export it back into... honestly. Let me know how!

Yeah I get what you are saying , it's kind of like now a layered Photoshop file that needs to be flattened.

USB, that's interesting: I just got this USB 2 drive cause it was a cheap way to fed ex my footage to an editor. Should I tell the editors to drag the files over to their hard drive? (I'm not even sure if the editor edited from the USB mobile drive directly, but my guess is yes) -- why is USB bad? I thought a drive is a drive.

Oct 17, 2007 9:37 AM in response to kevs55

Open your program
put the file in the timeline
Export>Current settings & make self contained
Give the file a different name.

USB works as packets, firewire is isochronos (creates a dedicated connection). USB can not guarantee the material will arrive on time and on budget. Firewire does a better job. E-Sata does a better job than firewire.

x

x

Oct 21, 2007 3:38 PM in response to Studio X

Ok, Studio, I made a unified version, getting rid of AV files. only difference is the new version says little endian, while original says big endian, in format. mean anything? Any other side issues by unifying everything and not keeping those AV's?

Now issue #2:
The size of the unified is the same as the the orginal file plust the 2 AVs! -- 6 GBS, so in that sense I did not win. Maybe that's the deal with HD footage. Still - 6GB for a 9 minute clip. is that about right? thanks

Oct 23, 2007 11:28 AM in response to kevs55

Kevin,

As Shane stated earlier "these files are not extra." By combining them you have just made three files into one. They are going to be the same size as the original because you are not compressing them, which BTW, you probably don't want to do.

Also as Shane has stated, 6 GB is not that big. I routinely shoot in DVCProHD and I will shoot anywhere from 4 to 32 GB's in one day. I have over 3 TB's of storage on just one of my edit stations. 6GB's is tiny in video world.

K

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What are these AV1, AV2 files?

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