Djeizon Barros wrote:
> > Another possibility could be different line endings in some
> > metadata file (ie '\r\n' on windows and '\n' on Linux).
> >
>
> The produced files are tagless. So I don't know about this... but
> it is a good guess
Its a good guess and its wrong :-).
> I have uploaded a small file example for you to check.
> I am curious about what is exactly producing this mismatch filesize!
> I know it's ridiculous and probably too paranoid, but knowledge is always
> welcome.
>
>
> -rw-r--r-- 1 djzn djzn 341418 2010-02-11 20:34 bandstand-linux.flac
> -rw-r--r-- 1 djzn djzn 556308 2010-02-11 20:34 bandstand.wav
> -rw-r--r-- 1 djzn djzn 341429 2010-02-11 20:34 bandstand-win32.flac
Wow, this is weird.
I have a program thats part of libsndfile called sndfile-cmp. Run as:
sndfile-cmp bandstand-linux.flac bandstand-win32.flac
it shows nothing which means that the decoded audio of the two files is
identical.
However, I also have a hexdiff program which shows the two files to contain
the identical byte data all the way up to offset 0x2080. Then the files
diverge wildly:
00002070: FF F8 C9 A8 00 8D 4E 00 00 00 00 FF FF FF FF FF ......N. ........
FF F8 C9 A8 00 8D 4E 00 00 00 00 FF FF FF FF FF ......N. ........
00002080: FF FF FE FF FE FF FE B4 A2 7D E8 9D 2E 79 91 47 ........ .}...y.G
FF FF FE FF FE FF FE B4 A2 7D E8 9D 36 79 11 47 ........ .}..6y.G
00002090: 57 05 9F DD 0A 2A 54 52 A5 13 13 2D 4B 2C B2 94 W....*TR ...-K,..
57 05 9F DD 0A 2A 54 52 A5 13 13 2D 4B 2C 59 4A W....*TR ...-K,YJ
000020A0: 95 6A 2D 25 24 85 95 96 26 49 0A 13 53 A9 24 51 .j-%$... &I..S.$Q
4A B5 16 92 92 42 CA CB 13 24 85 09 A9 D4 92 28 J....B.. .$.....(
The first column is the file offset and the first line for a given offset
is one file and the second line is the second file.
>From offset 0x20A0 on the (encoded) files are far more different than
they are similar, but the decoded audio data is exactly the same.
I've got some ideas as to why this might be, but its pure speculation.
It would be much better to hear what Josh has to say.
Erik
--
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/
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