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Please help me salvage recorded MP3 that seems to have been corrupted, [TOS #6: was “Help with file playback issue” in General Audio]
kwdelre
post Jan 6 2013, 01:20
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Hello everyone,

I really need some help here. I recorded a meeting using a MemoQ Pen Recorder MQ-94. It records in MP3 format and has worked in the past. Well, after the meeting I went to download it from the flash drive and the file will not playback on anything. (I've tried all I can on both windos and Mac) The file itself appears to have recorded because it is a 17 mb file, so I know it wrote something. There is clearly an issue with the recorder itself since it used to work fine, but what I need to do is try to recover this file.

When attempting to open the file on a Mac it does nothing. On windows it gives me a general playback error as if it didn't recognize the codec.
The only program I was able to get the file to even open in was Audacity. In Audacity the file appears as a 1.5 sec clip and when I play it, it sounds like the entire hour long meeting in a second.

I tried two programs to repair the file without any luck. (All Media Fixer, and MP3 Repair Tool)

I can't figure out anything else to try at this point to recover this file. Any help would be greatly appreciated.

-Will
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kwdelre
post Jan 10 2013, 04:20
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QUOTE (mjb2006 @ Jan 9 2013, 20:04) *
xvi32 couldn't open the original? Now that is weird. It doesn't care what the format is. It should open anything. Was something locking the file?

What you did open does not look like MPEG audio to me. Every 288 bytes, the same structure repeats: 00 E3 48 C4 00 (rest varies).

Is this what the whole file looks like?



Yeah it looks like it does repeat...
This may be the product of running the broken mp3 through the repair software, maybe not the original.
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splice
post Jan 10 2013, 07:15
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QUOTE (kwdelre @ Jan 9 2013, 19:20) *
...
Yeah it looks like it does repeat...
This may be the product of running the broken mp3 through the repair software, maybe not the original.


It does look broken. The repeating pattern makes sense as a frame header if you allow that the first byte should be FF instead of 00. (FF E3 48 C4 instead of 00 E3 48 C4)
The rest of the bits decode as:
MPEG 2.5
Layer III
Not protected
32K Bitrate
8 KHz sampling rate
Mono
Not copyright
Original Media

This would be consistent with a memo recorder designed for best performance at low bitrates. Or it could simply be a coincidence...

We really need to see the original file.

This post has been edited by splice: Jan 10 2013, 07:17


--------------------
Regards,
Don Hills
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Posts in this topic
- kwdelre   Please help me salvage recorded MP3 that seems to have been corrupted   Jan 6 2013, 01:20
- - DigitalMan   You could try using the program Foobar2000. Right ...   Jan 6 2013, 04:59
- - splice   ... but remember to make a copy of the file first,...   Jan 6 2013, 11:26
- - DonP   QUOTE (kwdelre @ Jan 5 2013, 19:20) . In ...   Jan 6 2013, 13:50
- - kwdelre   Hi everyone. Thank you very much for the reply. I...   Jan 9 2013, 06:56
- - mjb2006   Get xvi32 (free binary editor) and open the file i...   Jan 9 2013, 14:01
- - kwdelre   QUOTE (mjb2006 @ Jan 9 2013, 07:01) Get x...   Jan 10 2013, 01:39
- - mjb2006   xvi32 couldn't open the original? Now that is ...   Jan 10 2013, 03:04
- - kwdelre   QUOTE (mjb2006 @ Jan 9 2013, 20:04) xvi32...   Jan 10 2013, 04:20
|- - splice   QUOTE (kwdelre @ Jan 9 2013, 19:20) ... ...   Jan 10 2013, 07:15
- - mjb2006   In xvi32 you can do a search and replace for that ...   Jan 10 2013, 08:49
- - kwdelre   I will get an audio sample ready to post. Wanted ...   Jan 11 2013, 01:38
- - kwdelre   I may not have file upload privileges yet. Or, I s...   Jan 11 2013, 02:00
|- - Dynamic   QUOTE (kwdelre @ Jan 11 2013, 01:00) I ma...   Jan 11 2013, 11:10
- - Aleron Ives   That error means that although the file has the MP...   Jan 11 2013, 02:52
- - mjb2006   nm.   Jan 11 2013, 07:55
- - splice   From looking at the sketchy info online, it looks ...   Jan 11 2013, 13:00
|- - Dynamic   QUOTE (splice @ Jan 11 2013, 12:00) Does ...   Jan 11 2013, 14:50
- - kwdelre   Okay, I was able to upload a sample file from the ...   Jan 11 2013, 21:37
|- - splice   QUOTE (kwdelre @ Jan 11 2013, 13:37) Okay...   Jan 12 2013, 00:39
- - mjb2006   Turns out the first byte in each frame header vari...   Jan 12 2013, 01:56
- - kwdelre   QUOTE (splice @ Jan 11 2013, 17:39) Aha.....   Jan 12 2013, 04:11
- - kwdelre   I am beyond words right now. I cannot thank you al...   Jan 12 2013, 04:52
- - mjb2006   Still, I think your pen is broken   Jan 12 2013, 11:19
- - kwdelre   QUOTE (mjb2006 @ Jan 12 2013, 04:19) Stil...   Jan 12 2013, 20:37


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