Mark0's Forum
Software => TrID File Identifier => Topic started by: camarg on February 08, 2011, 06:48:26 PM
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TrID not recognize this form of [compression|embedding]
0000: 5A 01 01 1B 5B FF D8 FF E0 00 10 4A 46 49 46 00 Z...[......JFIF.
......
____NOTE_____
renaming file with JPG extension cause XNVIEW open this seamlessly as a standart JPG
?
--> the author of XNVIEW (P. Gougelet) as some knowledge of this format
--> XNVIEW use a library that have knowledge of this format
_______________BUT_________________
0000: 5A 01 01 10 21 47 49 46 38 39 61 58 00 1A 00 F7 Z...!GIF89aX....
0000: 5A 03 01 18 85 02 2C 9F 03 0B E7 89 50 4E 47 0D Z.....,.....PNG.
as you see they'r also embedded picture formats :
in this cases, renaming as GIF or PNG won't work
with XNVIEW !? gulp !
===
* at this time i have not tried other picture/multimedia viewer (like IRFANVIEW)
* I plan to wrote to P. Gougelet abot this curiosity
___________at end______________
0000: 5A 01 01 08 6E 1F 8B 08 00 00 00 00 00 00 03 AD Z...n...........
this exemple not embed a know (by me!) format
__________some tracks___________
?
->http 1.1 compression
?
->implemented with Zlib
->implemented with other
->other
ps -- it's possible i have already posted this! or may be, I posted on unrelevant board and this message is in limbic space....
camarg
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Somes additions
* this header seems to be more a archive format as tar, that a a compress format as zip
* in some case i found more that one file like a css, a png, a js bundled togeter, and i can manualy extract them
* if the embedded file is a zip like that :
0000: 5A 02 01 35 7C 02 14 00 50 4B 03 04 14 00 00 00 Z..5|...PK......
0010: 08 00 83 B9 08 25 84 78 36 58 FC 04 00 00 E9 0A .....%.x6X......
0020: 00 00 0A 00 00 00 52 45 41 44 4D 45 2E 54 58 54 ......README.TXT
....
total commander open the zip correctly without warning !!
(nowadays TC7 use his own TCUNZLIB.DLL)
* the string after the magic seems not to have a fixed lenght across samples i own
--> I can send some example files if needed
--
a mai e melhor
camarg
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Hi!
ps -- it's possible i have already posted this! or may be, I posted on unrelevant board and this message is in limbic space....
Actually you wrote me an email about this some days ago, and I replied the subsequent day. :)
As I said, I think that probably XNVIEW JPEG decoder simply skip a few bytes at
the start until it find the proper JPEG header.
The two bytes 5A 01 don't remind me of any known / standard header at the moment -
but that doesen't necessary mean that there isn't one.
Thanks,
Bye!