On Thu, Nov 17, 2005 at 06:29:26PM +0100, Steffen R. Knollmann wrote:
> Oh, okay. Now. Sorry, my fault. The files are not corrupt, they are
> still valid ogg-files (as in: can be readily played). The content
> though is faulty and will sound really bad and even have higher
> bitrates than it is supposed to have.
>
> This is something that might go unnoticed if the quality setting is
> high (target bitrate of 256kB/s or so). I will try that.
So I made a couple of runs on the same wav ("Stream of Passion -
Spellbound"):
quality setting nominal bitrate bitrate faulty bitrate correct
2 96 kB/s 131,068259 kb/s 94,005275 kb/s
4 128 kB/s 156,445113 kb/s 126,269563 kb/s
6 192 kB/s 295,187676 kb/s 187,735141 kb/s
8 256 kB/s 390,066274 kb/s 253,991523 kb/s
10 499,821000 kb/s 539,641787 kb/s 469,760050 kb/s
The bitrate values are the ones given when running ogginfo on the
files.
The worse quality is audible in all files but you might not spot them
in the -q 10 (and maybe -q 8) settings if you are not explicitly
listening for them.
To really hear what I mean with worse quality compare the files in
quality setting 2. This should really be a huge difference. Or even
compare the faulty -q 2 setting with the correct -q 4 setting which have
approximately the same bitrate.
Cheers,
Steffen
--
Grau, teurer Freund, ist alle Theorie,
Und grün des Lebens goldner Baum.
-- Goethe, Faust
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