SRW filetype. Samsung RAW

[Johanes]

After reading the v6.14 release notes, I've noticed that there is much work to be done around RAW files, since some of these are gathered in TIF filetype. My problem is about Samsung RAW files, SRW.

Here we have the fidentify output:

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fidentify _SAM4427.SRW 
_SAM4427.SRW: tif

But PhotoRec is not recovering anything.

This is the

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hexdump -C _SAM4433.SRW | head

of 3 different SRW files:

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00000000  4d 4d 00 2a 00 00 00 08  00 06 01 0f 00 02 00 00  |MM.*............|
00000010  00 10 00 00 00 56 01 10  00 02 00 00 00 10 00 00  |.....V..........|
00000020  00 66 01 12 00 03 00 00  00 01 00 01 00 00 01 32  |.f.............2|
00000030  00 02 00 00 00 14 00 00  00 76 01 4a 00 04 00 00  |.........v.J....|
00000040  00 02 00 00 00 8a 87 69  00 04 00 00 00 01 00 00  |.......i........|
00000050  00 92 00 01 95 72 53 41  4d 53 55 4e 47 20 20 20  |.....rSAMSUNG   |
00000060  20 20 20 20 20 00 4e 58  31 30 20 20 20 20 20 20  |     .NX10      |
00000070  20 20 20 20 20 00 32 30  31 33 3a 30 39 3a 30 37  |     .2013:09:07|
00000080  20 31 30 3a 31 37 3a 30  32 00 00 01 af a8 00 01  | 10:17:02.......|
00000090  b0 12 00 13 82 9a 00 05  00 00 00 01 00 00 01 7c  |...............||

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00000000  4d 4d 00 2a 00 00 00 08  00 06 01 0f 00 02 00 00  |MM.*............|
00000010  00 10 00 00 00 56 01 10  00 02 00 00 00 10 00 00  |.....V..........|
00000020  00 66 01 12 00 03 00 00  00 01 00 08 00 00 01 32  |.f.............2|
00000030  00 02 00 00 00 14 00 00  00 76 01 4a 00 04 00 00  |.........v.J....|
00000040  00 02 00 00 00 8a 87 69  00 04 00 00 00 01 00 00  |.......i........|
00000050  00 92 00 01 94 2c 53 41  4d 53 55 4e 47 20 20 20  |.....,SAMSUNG   |
00000060  20 20 20 20 20 00 4e 58  31 30 20 20 20 20 20 20  |     .NX10      |
00000070  20 20 20 20 20 00 32 30  31 33 3a 30 39 3a 30 37  |     .2013:09:07|
00000080  20 31 30 3a 31 38 3a 30  36 00 00 01 b1 82 00 01  | 10:18:06.......|
00000090  b1 ec 00 13 82 9a 00 05  00 00 00 01 00 00 01 7c  |...............||

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00000000  4d 4d 00 2a 00 00 00 08  00 06 01 0f 00 02 00 00  |MM.*............|
00000010  00 10 00 00 00 56 01 10  00 02 00 00 00 10 00 00  |.....V..........|
00000020  00 66 01 12 00 03 00 00  00 01 00 01 00 00 01 32  |.f.............2|
00000030  00 02 00 00 00 14 00 00  00 76 01 4a 00 04 00 00  |.........v.J....|
00000040  00 02 00 00 00 8a 87 69  00 04 00 00 00 01 00 00  |.......i........|
00000050  00 92 00 01 8c ee 53 41  4d 53 55 4e 47 20 20 20  |......SAMSUNG   |
00000060  20 20 20 20 20 00 4e 58  31 30 20 20 20 20 20 20  |     .NX10      |
00000070  20 20 20 20 20 00 32 30  31 33 3a 30 39 3a 30 37  |     .2013:09:07|
00000080  20 31 30 3a 31 38 3a 31  33 00 00 01 a8 60 00 01  | 10:18:13....`..|
00000090  a8 ca 00 13 82 9a 00 05  00 00 00 01 00 00 01 7c  |...............||

I have tried to add the extension following this guide step by step, and checking just the Own custom signatures option, but nothing happened. This is the signature, is it right?

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SRW 0 "MM.*.................V...........f.............2.........v.J...........i.............,SAMSUNG        .NX10      "

The program and de HDD are both working since I've obtained thousands of jpg files from the unit.

I don't know how to keep working...

[cgrenier]

Can you send me an unmodified SRW file ?

[Johanes]

The 3 "hexdumps" I've posted above are from unmodified SRW files, anyway, here you have:

https://www.dropbox.com/s/zo717ssq8rxjlnu/_SAM4139.SRW

And another problem I've just noticed this morning (I'm in GMT +02:00), the mp4 video files from this camera are also not recovered by PhotoRec. Again the same problem, my own extension hasn't worked. Can I send you the mp4 file link by private message?

[cgrenier]

I have launch PhotoRec 6.14 on the sample file, it's recovered perfectly as a .tif, the recovered file may be larger than the original.
BTW the signature you have used is wrong, you can use instead "SRW 0 4d 4d 00 2a 00 00 00 08".
PhotoRec may failed to recover your files because of data fragmentation or if the media has been wiped (content has been overwritten)