Nextbase Dashcam - Sandisk 128GB MicroSD corrupted
Posted: 28 Feb 2024, 14:43
A previously working and regularly reformatted MicroSD card from a Nextbase Dashcam 522GW lost all files after plugging into my Mac... all that is on there now is the .VT100Spotlight folder that the Mac indexes searches with. The drive would normally have a label of NEXTBASE - this is missing.
Photorec manages to recover >1000 files but most of these (which are MP4 format as seen as MOV by Photorec) cannot be opened... I know often this is considered to be fragmentation but oddly I can read 66 files and a bunch of text files that hold the dashcam status. Would I be able to read any of the .mov files if .mdat/ftyp fragmentation was at play. The Nextbase writes a small preview AND a larger full resolution file - they are not identical sizes but follow that pattern. The card was formatted before these files were written so there should be no over-writing taking place.
Running hexdumps:
These two work and are 1 minute (the Nextbase default) long:
These two don't work:
Any suggestions would be most appreciated!
Thank you
Ian
Photorec manages to recover >1000 files but most of these (which are MP4 format as seen as MOV by Photorec) cannot be opened... I know often this is considered to be fragmentation but oddly I can read 66 files and a bunch of text files that hold the dashcam status. Would I be able to read any of the .mov files if .mdat/ftyp fragmentation was at play. The Nextbase writes a small preview AND a larger full resolution file - they are not identical sizes but follow that pattern. The card was formatted before these files were written so there should be no over-writing taking place.
Running hexdumps:
These two work and are 1 minute (the Nextbase default) long:
Code: Select all
f7408128_ftyp.mov
00000000 00 00 00 20 66 74 79 70 61 76 63 31 00 00 00 00 |... ftypavc1....|
00000010 61 76 63 31 69 73 6f 6d 00 00 00 00 00 00 00 00 |avc1isom........|
00000020 0a 2b bf 38 6d 64 61 74 00 00 00 02 09 10 00 00 |.+.8mdat........|
00000030 00 13 06 00 0d 80 af c8 00 00 03 00 00 af c8 00 |................|
00000040 00 03 00 40 80 00 00 00 0e 06 01 09 00 3c 08 24 |...@.........<.$|
00000050 68 00 00 03 00 01 80 00 00 00 05 06 06 01 c4 80 |h...............|
00000060 00 04 7c 04 25 88 80 20 00 4c c6 f5 66 33 27 0b |..|.%.. .L..f3'.|
00000070 d0 ce b3 93 4a 2f 47 e6 ab f2 f6 7c 45 25 1d d4 |....J/G....|E%..|
00000080 dc 43 4d 26 fe 24 1c 7d 0e 56 12 e2 55 be 46 68 |.CM&.$.}.V..U.Fh|
00000090 7f d2 fe 9c 1b 8d 90 09 8f 11 b4 4d 74 48 9d e3 |...........MtH..|
f7428608_ftyp.mov
00000000 00 00 00 20 66 74 79 70 61 76 63 31 00 00 00 00 |... ftypavc1....|
00000010 61 76 63 31 69 73 6f 6d 00 00 00 00 00 00 00 00 |avc1isom........|
00000020 00 9c 20 78 6d 64 61 74 00 00 00 02 09 10 00 00 |.. xmdat........|
00000030 00 13 06 00 0d 80 af c8 00 00 03 00 00 af c8 00 |................|
00000040 00 03 00 40 80 00 00 00 0e 06 01 09 00 3c 08 24 |...@.........<.$|
00000050 68 00 00 03 00 01 80 00 00 00 05 06 06 01 c4 80 |h...............|
00000060 00 00 46 c4 25 88 80 20 03 ff f2 1f 73 2e 4b 0c |..F.%.. ....s.K.|
00000070 b6 eb 4c 9d 7a ee d1 8d 29 16 20 7e aa ee 28 f4 |..L.z...). ~..(.|
00000080 9e f3 52 6f 02 f5 1c 0a 3b f7 90 81 54 83 2e 14 |..Ro....;...T...|
00000090 55 67 6d 20 af d5 ff e5 04 6e 56 57 ff 4c fb 51 |Ugm .....nVW.L.Q|
Code: Select all
f7776768_ftyp.mov
00000000 00 00 00 20 66 74 79 70 61 76 63 31 00 00 00 00 |... ftypavc1....|
00000010 61 76 63 31 69 73 6f 6d 00 00 00 00 00 00 00 00 |avc1isom........|
00000020 0a af eb 5a 6d 64 61 74 00 00 00 02 09 10 00 00 |...Zmdat........|
00000030 00 13 06 00 0d 80 af c8 00 00 03 00 00 af c8 00 |................|
00000040 00 03 00 40 80 00 00 00 0e 06 01 09 00 3c 08 24 |...@.........<.$|
00000050 68 00 00 03 00 01 80 00 00 00 05 06 06 01 c4 80 |h...............|
00000060 00 04 91 24 25 88 80 20 00 4c c6 ea 6a 2b 81 58 |...$%.. .L..j+.X|
00000070 56 2b b4 ed 3f 26 c1 2e 10 68 85 20 8f cf f8 63 |V+..?&...h. ...c|
00000080 45 f3 7c bc 9a 83 56 15 71 22 6e 76 a5 b9 21 39 |E.|...V.q"nv..!9|
00000090 17 6c 7f e1 10 42 9a 4f 65 d4 c4 95 96 70 c9 13 |.l...B.Oe....p..|
f7797248_ftyp.mov
00000000 00 00 00 20 66 74 79 70 61 76 63 31 00 00 00 00 |... ftypavc1....|
00000010 61 76 63 31 69 73 6f 6d 00 00 00 00 00 00 00 00 |avc1isom........|
00000020 00 a7 94 3a 6d 64 61 74 00 00 00 02 09 10 00 00 |...:mdat........|
00000030 00 11 06 00 0d 80 af be 00 00 0a 00 af be 00 00 |................|
00000040 0a 40 80 00 00 00 0e 06 01 09 00 3c 08 24 68 00 |.@.........<.$h.|
00000050 00 03 00 01 80 00 00 00 05 06 06 01 c4 80 00 00 |................|
00000060 3b 26 25 88 80 20 00 df 00 2a d6 47 eb 2d 6c 1f |;&%.. ...*.G.-l.|
00000070 7e 88 4a 55 31 23 71 65 af 69 a3 d3 88 70 61 51 |~.JU1#qe.i...paQ|
00000080 03 87 00 9e 63 f8 1d 3a 18 57 01 a3 9c db e1 b7 |....c..:.W......|
00000090 d6 90 74 b5 1e 07 1e 96 ce 4e b9 e4 15 60 22 fc |..t......N...`".|
Code: Select all
total 740088
drwxr-xr-x 6 root staff 192 28 Feb 12:48 .
drwxr-xr-x 12 root staff 384 28 Feb 12:48 ..
-rw-r--r-- 1 root staff 178203180 27 Feb 22:59 f7408128_ftyp.mov
-rw-r--r-- 1 root staff 10431020 27 Feb 22:59 f7428608_ftyp.mov
-rw-r--r-- 1 root staff 179301242 27 Feb 22:59 f7776768_ftyp.mov
-rw-r--r-- 1 root staff 10982490 27 Feb 22:59 f7797248_ftyp.mov
Thank you
Ian