320K CBR是最好的毫无疑问
--abr naverage bitrate encoding
Turns on encoding with a targeted average bitrate of n kbits, allowing to use frames of different sizes. The allowed range of n is 8-310, you can use any integer value within that range.
It can be combined with the -b and -B switches like:
lame --abr 123 -b 64 -B 192 a.wav a.mp3
which would limit the allowed frame sizes between 64 and 192 kbits.
-V 0...9VBR quality setting
Enable VBR (Variable BitRate) and specifies the value of VBR quality.
default=4
0=highest quality.
--vbr-newnew VBR mode
Invokes the newest VBR algorithm. During the development of version 3.90, considerable tuning was done on this algorithm, and it is now considered to be on par with the original --vbr-old.
It has the added advantage of being very fast (over twice as fast as --vbr-old).
--vbr-oldolder VBR mode
Invokes the oldest, most tested VBR algorithm. It produces very good quality files, though is not very fast. This has, up through v3.89, been considered the "workhorse" VBR algorithm.
-B nmaximum VBR/ABR bitrate
For MPEG1 (sampling frequencies of 32, 44.1 and 48 kHz)
n = 32,40,48,56,64,80,96,112,128,160,192,224,256,320
For MPEG2 (sampling frequencies of 16, 22.05 and 24 kHz)
n = 8,16,24,32,40,48,56,64,80,96,112,128,144,160
Specifies the maximum allowed bitrate when using VBR/ABR
Built-in presets
Lame features some built-in presets. Those presets are designed to provide the highest possible quality.
They have for the most part been subject to and tuned via rigorous listening tests to verify and achieve this objective. These are continually updated to coincide with the latest developments that occur and as a result should provide you with nearly the best quality currently possible from LAME.
If your goal is quality, these presets are highly recomended over any custom set of parameters you might use. To activate presets, you should use:
lame --preset preset_name
VBR modes
--preset medium
This preset should provide near transparency to most people on most music.
The resulting bitrate should be in the 150-180kbps range, according to music complexity.
--preset standard
This preset should generally be transparent to most people on most music and is already quite high in quality.
The resulting bitrate should be in the 170-210kbps range, according to music complexity.
--preset extreme
If you have extremely good hearing and similar equipment, this preset will provide slightly higher quality than the "standard" mode.
The resulting bitrate should be in the 200-240kbps range, according to music complexity.
Any of those VBR presets can also be used in fast mode, using the new vbr algorithm. This mode is faster, but its quality could be a little lower. To enable the fast mode, use:
lame --preset fast preset_name
warning: with the current version fast presets might result in too high bitrate compared to regular presets.
CBR 320kbps
--preset insane
This preset will usually be overkill for most people and most situations, but if you must have the absolute highest quality with no regard to filesize, this is the way to go. This preset is the highest preset quality available.
ABR modes
--preset
Using this preset will usually give you good quality at a specified bitrate. Depending on the bitrate entered, this preset will determine the optimal settings for that particular situation.
While this approach works, it is not nearly as flexible as VBR, and usually will not reach the same quality level as VBR at higher bitrates.
If you need CBR encoding, those presets can also be used in CBR mode by using:
lame --preset cbr
