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Quicktime 10 crash whilst recording event audio recovery

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Chris Lambert
Quicktime 10 crash whilst recording event audio recovery
on Apr 22, 2013 at 6:27:23 pm

Hi everyone

I've recently run into a massive problem whilst shooting an event and running an events mixer into my line in on my Macbook Pro OSX ML and Quicktime 10 I left the program running for 4hr's and then returned to my mac to find that the program had crashed before I had a chance to save. I tracked down the recording with my application folders etc and found

1. "unsaved" Quicktime container file
-1 index file
-1 .aifc file

I sent this 4gb file off to some data recovery specialists who have managed to recover it but have requested about $300 to do so! They did however tell me the settings of the file and that it is almost entirely recoverable.

Does anyone know how I should go about this vlc, quicktime etc either do not open the file or show anyway of being able to adjust it.

Format : AIFC
Format/Info : Apple/SGI
File size : 4294841334 B
Duration : 4h 30mn 31s 482ms
Overall bit rate mode : Constant
Overall bit rate : 2 117 Kbps

Format : PCM 4C69 6E65 6172 2050 434D 2C20 3234 2062 Linear PCM, 24 bit big-endian signed integer
Format settings, Endianness : Big
Duration : 4h 30mn 31s 482ms
Bit rate mode : Constant
Bit rate : 2 117 Kbps
Channel(s) : 2 channels 0x0002
Sampling rate : 44.1 KHz 400E AC44 44100.000000
Bit depth : 24 bits 0x0018 0x12+0x06
Stream size : 4294.8 MiB (100%)

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Jean-Christophe Boulay
Re: Quicktime 10 crash whilst recording event audio recovery
on Apr 24, 2013 at 5:03:10 pm

Hi Chris,

They're probably using a hexadecimal editor, like HexEdit, to close the file that has been unterminated by Quicktime, which should recover the data recorded up to the crash. You really have to know what you're doing to make sense of the operation. This would be a good time to have a coder friend. I've had one of mine do something similar for me and all he asked for was a beer. Maybe some digging on Google can get you by.

AtomBox gives you access to the QT file's structure, with built-in hex editing and could be used to repair the file if you know about atom structure. It runs on Windows.

It's up to you if your time twiddling about with this is worth 300$ or not. I'd look into a more rugged recording software for future gigs.

JC Boulay
Technical Director
Audio Z
Montreal, Canada

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Chris Lambert
Re: Quicktime 10 crash whilst recording event audio recovery
on Apr 25, 2013 at 3:37:35 pm

Thank you Jean I'll have a dabble and see what I can do.

Absolutely agree this is probably the most careless I've been in just assuming something would work as Quicktime has never let me down before and was worried that the AA's in my field recorder would wind down and catch me out.

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