ARRI DigitalGeneral CategoryTechnicalCorrupt Alexa ProRes4444 Quicktimes
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revolttv
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« on: August 29, 2012, 07:39:49 PM »

I was brought in on a production with a curious situation.  This is a 2 camera Alexa shoot and they are 17 days in at this point.  The loader is using Al3xa Data Manager and the process has been seamless.

Yesterday, the loader didn't scrub the footage after offloading 2 cards and thus the footage is corrupt.  The ProRes files are there they are just unreadable.  The RD5 files, XML file and .ALE file are all empty with no data, but they exist.  I am trying my best to resurrect these quick times, this is very similar to R3D file corruption.  Any suggestions?

Thanks in advance,

Jonny Revolt
Santa Monica/Dallas
DIT 600
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Michael Borenstein
Digital Service Manager, Arri Inc.
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« Reply #1 on: August 30, 2012, 09:44:50 AM »

Jonny,

Do you still have the cards with the original data on them?  Is that what you are saying has the ALE and XML files on it?  If you still have the cards and haven't full erased or quick erased and re-written to them, we might be able to recover the footage. 

It doens't sound like the files were not closed when they were recorded.  The likelihood that all the files would be corrupt due to some sort of camera malfunction are slim to none. 

Please feel free to email or call me if you'd like to discuss. 
Regards
Mike
mborenstein@arri.com
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Michael Borenstein
Digital Service Manager, Arri Inc.

Anders Holck
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« Reply #2 on: September 01, 2012, 02:56:40 AM »

If the MD5 file is empty it sounds like a Al3xa manager issue as this file is created during the offloading process by the software. How it can write the empty checksum file and then verify it as correct seems very wrong.
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Anders Holck
Founder / CTO - Redrental aps

Michael Borenstein
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« Reply #3 on: September 04, 2012, 10:51:41 AM »

Anders,

thanks for pointing that out.  I would concur completely.

Regards
Mike
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Michael Borenstein
Digital Service Manager, Arri Inc.

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