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Topic: LAME -h switch (Read 6342 times) previous topic - next topic
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LAME -h switch

Out of curiosity (once again), I wonder what LAME -h switch REALLY improves? The documentation only says "-h: Use some quality improvements" but it doesn't say specifically what it is.
sin(α) = v sound/v object = Mach No.

LAME -h switch

Reply #1 –
try --longhelp

Code: [Select]
Noise shaping & psycho acoustic algorithms:
  -q <arg>        <arg> = 0...9.  Default  -q 5
                  -q 0:  Highest quality, very slow
                  -q 9:  Poor quality, but fast
  -h              Same as -q 2.   Recommended.
  -f              Same as -q 7.   Fast, ok quality
"I hear it when I see it."

LAME -h switch

Reply #2 –
Are the -q and -V switch similar?
sin(α) = v sound/v object = Mach No.

LAME -h switch

Reply #3 –
Quote from: SonicBooom! on
Are the -q and -V switch similar?

Not really.

The -V switch sets the desired audio quality, and the algorithm then uses the minimum bits to achieve that quality. By varying the -V switch you get a wide range of quality and bitrate.

The -q switch controls how much processor time is spent sqeezeing every last bit of quality for the available bits. Its effect on processor time is significant, but its effect on quality and file size is relatively small. Since you only encode once, and since processor power is cheap, there is no reason anymore to use anything other than the default -q value.

LAME -h switch

Reply #5 –
@pdq: Thanks! I see it now more clearly. The default -q value which is -q 2 is always enabled when using VBR. The -q 2 is the same as -h, right? I get it now, Hehe.. Thanks again! 
sin(α) = v sound/v object = Mach No.

LAME -h switch

Reply #6 –
Correct. I believe the -q5 default is from an old version, however; I was under the implication that -q2 was the default for both CBR and VBR encoding now.
 

LAME -h switch

Reply #7 –
Quote from: Zarggg on
I was under the implication that -q2 was the default for both CBR and VBR encoding now.


vbr-new and vbr-old/CBR use the q switch differently. There are only two quality settings for vbr-new, and I believe it's separated as q 0 - 4 are all the same, and q 5 - 9 are also all the same. Regardless of which q numbers map to which mode, the higher of the two quality settings is enabled by default, so there is no reason to specify the q switch when using vbr-new.