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Topic: Mysterious Bitrate bloat @ LAME (Read 2909 times) previous topic - next topic
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Mysterious Bitrate bloat @ LAME

http://www.hydrogenaudio.org/forums/index....ndpost&p=310660

[...]
Anyway, the 242kbps file seems pretty interessting:

Lame 3.96.1 -V2: 263kbps*
Lame 3.96.1 -V2 -Y: 263kbps*
Lame 3.96.1 -V0: 298kbps*
Lame 3.90.3 -V2: 224kbps*
Lame 3.97 a10 -V2: 242kbps*

I analysed the file with mp3Gain and the song has a volume of 92dB and is not clipping...that's suprising because usally songs need at least a 1.5dB adjustment to prevent them from clipping. That made the bitrate bloat even more mysterious and therefore I did a spectrum analysis and guess what...there doesn't seem to be anything above 10khz! Most red and orange colors are below 5khz...that is really strange...from looking at the regular graph the file does not look anything like being overcompressed either...

So there's no sfb21 bloat, no 'expensive' frequencies, no overcompression and no loudness race...
[...]
* average bitrate based on entire file, not the uploaded sample.

[attachment=1621:attachment]
--alt-presets are there for a reason! These other switches DO NOT work better than it, trust me on this.
LAME + Joint Stereo doesn't destroy 'Stereo'