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Author Topic: Zero byte .wav file - how to restore?  (Read 9240 times)

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Offline rigpimp

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Re: Zero byte .wav file - how to restore?
« Reply #15 on: December 13, 2021, 04:51:16 PM »
If there is a file on the card back it up and host it for others to try. 
If there is no file on the card then try Recuva. https://www.ccleaner.com/recuva
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Offline daspyknows

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Re: Zero byte .wav file - how to restore?
« Reply #16 on: December 13, 2021, 05:02:57 PM »
Tried Recuva and shows 0 byte file but nothing more.  Only files on the card are the other Wav files.  Not finding anything hidden.

Offline rigpimp

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Re: Zero byte .wav file - how to restore?
« Reply #17 on: December 13, 2021, 05:18:40 PM »
Tried Recuva and shows 0 byte file but nothing more.  Only files on the card are the other Wav files.  Not finding anything hidden.

Sounds like the recorder errored out while recording, most likely shortly after starting.  Boo, hiss.
Mics: Schoeps MK 5 MP, Schoeps MK 8 MP, Schoeps MK 41 MP, KCY 250/5 > PFA
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Offline daspyknows

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Re: Zero byte .wav file - how to restore?
« Reply #18 on: December 13, 2021, 05:23:53 PM »
I checked about 45 minutes into the set and the red record light was on and 20 minutes later it ended with red light flashing and a file error message.  Couldn't do anything but turn off recorder by removing batteries. 

Offline if_then_else

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Re: Zero byte .wav file - how to restore?
« Reply #19 on: December 14, 2021, 02:05:47 AM »
Can you create an img file of your SD card (e.g. using a low level copy tool like dd on Linux/UNIX) and send me the file along with the information about the original bit depth, sample rate and the number of channels? I've tried out a couple of different tools on Linux and Windows recently and chances are that at least one of them might work.

Offline daspyknows

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Re: Zero byte .wav file - how to restore?
« Reply #20 on: December 14, 2021, 02:47:20 AM »
Can you create an img file of your SD card (e.g. using a low level copy tool like dd on Linux/UNIX) and send me the file along with the information about the original bit depth, sample rate and the number of channels? I've tried out a couple of different tools on Linux and Windows recently and chances are that at least one of them might work.

Sure.  Thx.  Will do that tomorrow.

Offline if_then_else

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Re: Zero byte .wav file - how to restore?
« Reply #21 on: December 15, 2021, 10:58:59 AM »
@daspy:

After having fixed the PCM-WAV header, it seems that after 4'55'' there is data corruption.

In other words, playback isn't stalling (as originally suspected by me) but the recorder appears to have recorded the same sample multiple times to the SD card. Which would explain why the file is so big (4.2 GiB).

It's exactly the same picture when I try to load the RAW file into Samplitude.

Cf. the screenshots below. Do you still want me to send you the WAV or FLAC file with the fixed header even though the problem is a lot more fundamental?

 

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