XDCAM File Sizes Change when Copied in Mountain Lion
Posted: July 30th, 2012, 8:45 pm
I transfer XDCAM media from Express Cards onto Raid1 drives for safe backup. I have used the same Mac workflow with all my tapeless media for years. I copy the entire contents of the camera card into the target folder. When the transfer is complete I right-click and "Get Info" to verify that the BPAV folders are exactly the same size in bytes. If the number of bytes (often in the trillions) is consistent, I can be confident that the files are identical. It's a simple process that has saved my butt several times when it's been necessary to re-populate a card and have the camera restore the files.
HOWEVER, NOT IN MOUNTAIN LION. When using "Get Info" to verify the new copies of BPAV folders in Mountain Lion, at first one size appears momentarily, which immediately changes to another number, kilobytes larger. Not only am I unable to confirm that I have properly backed up my media, I am also concerned about the integrity of the original files. These backups of the cards are my "camera originals". I do not want them altered in any way, which apparently the operating system is doing!
It does not seem to matter where I put the file, whether on an external drive or the desktop. I tested other camera files, from a GH2 and a Canon XA10. They DID NOT have this problem. I also found that this changing byte size only occurred to the new file. It does not appear to matter if the card is locked or not, the existing files on the card do not alter their original size. This would also seem to rule out Sony's Cinemon plug-in which I use to preview clips in Finder.
Is anyone else encountering this issue? Can someone tell me why this is happening and how to stop it?
HOWEVER, NOT IN MOUNTAIN LION. When using "Get Info" to verify the new copies of BPAV folders in Mountain Lion, at first one size appears momentarily, which immediately changes to another number, kilobytes larger. Not only am I unable to confirm that I have properly backed up my media, I am also concerned about the integrity of the original files. These backups of the cards are my "camera originals". I do not want them altered in any way, which apparently the operating system is doing!
It does not seem to matter where I put the file, whether on an external drive or the desktop. I tested other camera files, from a GH2 and a Canon XA10. They DID NOT have this problem. I also found that this changing byte size only occurred to the new file. It does not appear to matter if the card is locked or not, the existing files on the card do not alter their original size. This would also seem to rule out Sony's Cinemon plug-in which I use to preview clips in Finder.
Is anyone else encountering this issue? Can someone tell me why this is happening and how to stop it?