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<title>Usage of the commandline encoder</title>
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Index page
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About LAME
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Intro to encoding
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Usage of LAME
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Common switches
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Detailed Settings
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Version history
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Coders of LAME
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Contact LAME
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LAME links
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Common and recommended switches
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Common settings
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% lame [options] inputfile [outputfile]
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Constant Bitrate: -b number or
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--preset cbr number Valid values
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for the -b settings depend on the sampling rate<sup>1</sup>.
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lame -b 128 sample.wav sample.mp3
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Variable Bitrate (ABR mode):
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--abr number or --preset number
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Valid values for the --abr setting range from 8 to 320.
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lame --abr 128 sample.wav sample.mp3
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Variable Bitrate (VBR mode):
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-V number Valid values
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are from 0 to 9, with decimal values possible, where 0 is the highest quality
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while 9.999 is the lowest one.
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lame -V2 sample.wav sample.mp3
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Hydrogenaudio recommended settings
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Very high quality, HiFi, home, or quiet listening, with best file size :
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-V0 (avg. 245 kbps) or -V1
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(avg. 225 kbps) or -V2 (avg. 190 kbps) or -V3 (avg. 175 kbps).
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VBR settings will normally produce transparent results.
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Audible differences between these presets may exist, but are rare.
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Very high quality, HiFi, home, or quiet listening, with maximum file size<sup>2</sup> :
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-b 320
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This CBR mode will maximize the MP3's bitrate and overall file
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size. The extra space may allow for some parts of the audio to be
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compressed with fewer sacrifices, but to date, no one has produced
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ABX test results demonstrating that perceived quality is ever better
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than the highest VBR profiles described above.
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Portable, listening in noisy conditions, lower bitrate, smaller file size:
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-V4 (avg. 160 kbps) or -V5
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(avg. 130 kbps) or -V6 (avg. 115 kbps)
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-V6 produces an "acceptable" quality, while -V4 should be close to perceptual transparency.
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Very low bitrate, small sizes, eg. for voice, radio, mono encoding :
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--abr 80 (stereo) or --abr 56 -m m (mono)
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For very low bitrates, up to 100kbps, ABR is most often the best solution.
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--preset voice is only available in the command line front-end, and
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is there for compatibility. It is currently mapped to --abr 56 -mm,
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so that means that the recommendation would be to encode in mono,
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and use ABR.
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Codec
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sample frequencies (kHz)
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bitrates (kbps)
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MPEG-1 layer III 32, 44.1, 48
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32 40 48 56 64 80 96 112 128 160 192 224 256 320
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MPEG-2 layer III 16, 22.05, 24
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8 16 24 32 40 48 56 64 80 96 112 128 144 160
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MPEG-2.5 layer III 8, 11.025, 12
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8 16 24 32 40 48 56 64
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Lossy codecs, like MP3, should not be used for archiving,
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since the nature of lossy encoding always changes the original sound, even if it
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sounds transparent. Use lossless codecs for this purpose.
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