file corrupted

Issue #1168 invalid
Itichi Bo created an issue

It's the second time this week a file is corrupted. I don't know why.

I'm on Android 6.

I'm trying to restore the files by modifying the header in hexadecimal. Someone knows what is the right header (for M4A-HQ and for 3gpp) ?

I have two files: one is a m4a file of 89Mb recorded in M4A-HQ.

Right now I have:

00 00 00 18 66 74 79 70 6D 70 34 32 00 00 00 00
69 73 6F 6D 6D 70 34 32 3F 3F 3F 3F 6D 64 61 74
01 40 22 80 A3 7F F8 85 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D
2D 2D 2D 2E F4 F1 0A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5E 00 DE 36 2D 34 B8 51 84 16 41 00 97 5D
E8 6E A4 52 AD 30 94 52 61 AC 98 B3 D2 0F 40 45
98 84 C3 93 14 92 76 B0 74 3D 62 18 BD 31 0D 1E
68 86 3F 1A 42 F4 4C B9 A5 49 98 E4 C6 02 63 41
35 12 76 39 08 B2 48 C6 2F E7 29 78 FD 3B 36 56

which corresponds to: ....ftypmp42....isommp42????mdat.@"€£.ø…---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------.ôñ.ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ^.Þ6-4¸Q„.A.—]èn¤R.0”Ra¬˜³Ò.@E˜„Ó.’v°t=b.½1..h†?.BôL¹¥I˜äÆ.cA5.v9.²HÆ/ç)xý;6V

The other one is a 16Mb recorded file in 3gpp format.

The only header I find is : http://www.file-recovery.com/m4a-signature-format.htm

Right now I have:

00 00 00 18 66 74 79 70 33 67 70 34 00 00 00 00
69 73 6F 6D 33 67 70 34 3F 3F 3F 3F 6D 64 61 74
21 21 45 00 14 50 01 46 FA 81 0A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A
5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5A 5E
21 4E D2 FF FA 00 00 00 00 00 58 07 E0 3F 01 F8
0F C0 82 0F C5 F6 72 FB 84 8A FB 82 C9 4A 78 BE
25 66 95 2F 5F 9C ED D5 EF 7C 3C EA 9F A6 73 3D
A6 F9 D6 7C 71 A2 29 67 5E 9A CE F4 A6 C1 43 AE
9E 10 1D D8 FD A6 39 9E 27 59 84 D1 B2 A0 79 B0
E1 BA 33 54 0E 65 39 4E 0A 3D FB E8 4C 2B 4D 43
C7 00 0C B3 4E 63 3C 30 00 03 17 3C DF 56 1F D4
44 13 04 28 00 B1 5E 78 E6 8D F2 7E D3 D9 5F D7
3D 84 38 2B DB 6D B9 F8 DC E1 0E AA F4 3E F7 F5

which corresponds to: ....ftyp3gp4....isom3gp4????mdat!!E..P.Fú..ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ^!NÒÿú.....X.à?.ø.À‚.Åörû„Šû‚ÉJx¾%f•/œíÕï|<꟦s=¦ùÖ|q¢)g^šÎô¦ÁC®ž..Øý¦9ž'Y„Ѳ y°áº3T.e9N.=ûèL+MCÇ..³Nc<0...<ßV.ÔD..(.±^xæ.ò~ÓÙ×=„8+Ûm¹øÜá.ªô>÷õ

Thanks!

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