Date: Mon, 14 Apr 2003 23:25:17 -0600 From: <soralx@cydem.org.ua> To: mwm-dated-1050763555.d76c7b@mired.org Cc: multimedia@freebsd.org Subject: Re: How to play new flavor of mp3 files Message-ID: <200304142320.05656.soralx@cydem.org.ua> In-Reply-To: <16026.51618.401941.833013@guru.mired.org> References: <reichert@numachi.com> <200304131953.59231.soralx@cydem.org.ua> <16026.51618.401941.833013@guru.mired.org>
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> Without knowing what a real mp3 file should look like, anything beyond > "file" - which I tried, having seen avi files with an mp3 extension - > doesn't do me any good. > I wonder what the things really are? continuous file of MP3 '32-bit, 44.1kHz, stereo' headers with junk :) look at few other MP3 files Here you can see data immediately following MP3 header, no ID3 tags: `biew /usr/mp3/Running\ Wild/RunningWild-TheCurse.mp3`: ================================================================================ File : /usr/mp3/...-TheCurse.mp3 Size : 3071286 bytes 0% 00000000: FF FB 90 44 00 00 04 5E 82 B2 80 22 5B 70 00 00 D .^"[p 00000010: 06 50 00 00 00 0F 8A 0B 00 A1 05 0D C0 84 00 60 .P .. .. ` 00000020: 00 00 00 00 12 6B ED 7A 15 C7 63 B3 DD 9D C8 7F .kz.cݝ. 00000030: FF B3 BB 3F FF EE EC FF BA BB 64 FF FF FF F7 55 ?dU 00000040: 7F FF FF FC 35 75 D6 3E CB AB A5 D7 65 F0 D7 2C .5u>˫e, 00000050: 7C F9 C7 C4 C4 BA 96 5D 8F FE EA AE BF AB 63 1F |ĺ]ꮿc. 00000060: FF 0D BB 63 D9 31 3D 55 C4 C4 B9 B6 F6 3E 26 1B .c1=UĹ>&. 00000070: 75 4F AF 86 D9 C6 3D 93 13 0D 5C F9 C4 D0 55 23 uO=..\U# 00000080: 52 E2 C2 61 BA 13 08 A4 6A 66 43 8F 84 F4 15 49 Ra..jfC.I 00000090: AF 50 D8 D4 F1 D3 C6 A3 B8 13 43 A1 30 D0 75 93 Pƣ.C0u 000000A0: 0F 9D 36 21 46 B1 AC 84 2F 3A 6C 49 1D 42 50 6C .6!F/:lI.BPl [...] ================================================================================ Some MP3's have few KB of '0x00' or '0xff' after first header and before data Here you see ID3 tag, followed by headers[s?], and data (which must look random, because it's coded/compressed) `biew /usr/mp3/Crematory/Crematory-Unspoken.mp3`: ================================================================================ File : /usr/mp3/...-Unspoken.mp3 Size : 4769260 bytes 0% 00000000: 49 44 33 02 00 00 00 00 10 59 54 45 4E 00 00 10 ID3. .YTEN . 00000010: 00 53 6F 75 6E 64 4A 61 6D 20 76 32 2E 31 2E 31 SoundJam v2.1.1 00000020: 54 54 32 00 00 09 00 55 6E 73 70 6F 6B 65 6E 54 TT2 . UnspokenT 00000030: 50 31 00 00 0A 00 43 72 65 6D 61 74 6F 72 79 54 P1 . CrematoryT 00000040: 41 4C 00 00 08 00 42 65 6C 69 65 76 65 54 52 4B AL . BelieveTRK 00000050: 00 00 05 00 38 2F 31 32 54 59 45 00 00 05 00 32 . 8/12TYE . 2 00000060: 30 30 30 54 43 4F 00 00 05 00 28 31 37 29 00 00 000TCO . (17) 00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [...] 00000850: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00000860: 00 00 00 FF FB 92 40 00 00 00 00 00 37 80 00 00 @ 7 00000870: 00 00 00 06 F0 00 00 00 00 00 00 DE 00 00 00 00 . 00000880: 00 00 1B C0 00 00 00 00 00 00 00 00 00 00 00 00 . 00000890: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [...] 00001FF0: CA 8C 0A 14 30 D0 78 C2 F6 15 52 1A 2A 4C 58 48 ʌ..0x.R.*LXH 00002000: 09 44 A0 BE 10 81 A8 FE 58 12 73 43 22 92 75 19 .D .X.sC"u. 00002010: D4 F6 94 93 5A 52 08 0A 25 92 2D 67 69 D2 DB 58 ZR..%-giX 00002020: 21 C4 5A D6 1F 5E C5 03 E5 7F 2E A7 54 EB F3 DF !Z.^...T 00002030: FA FF 53 D4 CB 3F D9 7D 3F FF FC 6D 30 00 00 00 S?}?m0 00002040: 17 FF FF 92 86 CA C3 00 C7 57 CA 82 A6 A7 20 60 . Wʂ ` 00002050: E2 82 CA 8C 2B 14 E8 15 0A 9B 45 71 CB 38 9F EC ʌ+....Eq8 [...] ================================================================================ bash-2.05a# ls -alFG /usr/mp3/Crematory/Crematory-Unspoken.mp3 -rw-r--r-- 1 root wheel 4769260 Mar 25 2001 /usr/mp3/Crematory/Crematory-Unspoken.mp3 bash-2.05a# gzip -9 /usr/mp3/Crematory/Crematory-Unspoken.mp3 bash-2.05a# ls -alFG /usr/mp3/Crematory/Crematory-Unspoken.mp3.gz -rw-r--r-- 1 root wheel 4670433 Mar 25 2001 /usr/mp3/Crematory/Crematory-Unspoken.mp3.gz Only ~2.07216633188377232526639352855500% compression rate 8) another one - `biew /usr/mp3/\!NEW/GammaRay-RebellionInDreamland.mp3`: ================================================================================ File : /usr/mp3/...Dreamland.mp3 Size : 8377701 bytes 0% 00000000: FF FB 90 44 00 00 02 44 64 4B 50 21 13 6C 4A 0A D .DdKP!.lJ. 00000010: B8 A9 04 22 6D 89 35 81 6D A7 84 4D B1 3F B0 2B ."m5mM?+ 00000020: B5 10 89 B6 D0 09 50 92 55 8D D0 94 8C 82 D2 18 ..PUД. 00000030: 07 69 A4 30 64 62 49 A9 74 9A 19 1D 36 B9 89 36 .i0dbIt..66 00000040: C7 FB BB 3C E8 BF FC 87 45 72 98 A3 8E 47 D9 D8 <ErG 00000050: E7 27 FD BE CC FF 76 67 FB B3 3F FF F7 76 FB 3B 'vg?v; 00000060: B7 FF FF EE CE BE 85 33 0C 73 94 98 F5 50 95 55 ξ3.sPU 00000070: 6A BD A6 03 20 89 26 87 DA 4C 1C C4 93 00 CB A4 j. &L.ē ˤ 00000080: D0 C8 CA DA E6 41 6D 8E 4F 77 67 9D 17 FF FF 67 AmOwg.g 00000090: 76 7E EC 2C E4 7E EC 75 FF 67 6F 76 67 6F 76 67 v~,~ugovgovg 000000A0: 6E CE C4 3F DD 2C E8 A8 CE 44 5E A6 28 E6 8D 4D n?,D^(M ================================================================================ enough, I think :) part of your file again: ================================================================================ 00000000: FF FB 10 00 03 0A 02 0B 01 0B 03 05 02 04 04 08 . ............ 00000010: 09 07 09 08 07 09 02 0A 05 08 01 02 0A 07 06 07 ................ 00000020: 04 0A 0B 04 01 07 08 06 03 00 09 0A 00 06 02 00 ......... .. .. 00000030: 0B 05 0A 08 07 01 06 08 03 01 00 02 0A 06 0B 04 .......... ..... 00000040: 04 02 05 05 00 04 00 05 0B 07 0A 07 08 0B 07 02 .... . ......... 00000050: 0A 04 07 07 03 02 00 06 03 03 04 0B 01 0B 07 05 ...... ......... 00000060: 07 05 00 07 00 0B 0A 0B FF FB 10 00 05 0B 05 05 .. . .... .... 00000070: 04 0B 00 09 01 0A 05 04 05 00 0B 0A 09 00 04 03 .. ...... ... .. ================================================================================ something really weird I can't guarantee even 95%, however, that it's not a some sort of MPEG stream I'm too lazy to go and read mp3 headers descriptions... BTW, VBR MP3's look similar to the normal ones. 14.04.2003; 23:19:51 [SorAlx] http://cydem.org.ua/
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