183 lines
8.1 KiB
Plaintext
183 lines
8.1 KiB
Plaintext
LAME 32bits version 3.98.4 (http://www.mp3dev.org/)
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usage: lame [options] <infile> [outfile]
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<infile> and/or <outfile> can be "-", which means stdin/stdout.
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RECOMMENDED:
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lame -V2 input.wav output.mp3
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OPTIONS:
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Input options:
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--scale <arg> scale input (multiply PCM data) by <arg>
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--scale-l <arg> scale channel 0 (left) input (multiply PCM data) by <arg>
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--scale-r <arg> scale channel 1 (right) input (multiply PCM data) by <arg>
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--mp1input input file is a MPEG Layer I file
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--mp2input input file is a MPEG Layer II file
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--mp3input input file is a MPEG Layer III file
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--nogap <file1> <file2> <...>
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gapless encoding for a set of contiguous files
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--nogapout <dir>
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output dir for gapless encoding (must precede --nogap)
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--nogaptags allow the use of VBR tags in gapless encoding
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Input options for RAW PCM:
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-r input is raw pcm
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-x force byte-swapping of input
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-s sfreq sampling frequency of input file (kHz) - default 44.1 kHz
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--bitwidth w input bit width is w (default 16)
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--signed input is signed (default)
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--unsigned input is unsigned
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--little-endian input is little-endian (default)
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--big-endian input is big-endian
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Operational options:
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-a downmix from stereo to mono file for mono encoding
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-m <mode> (j)oint, (s)imple, (f)orce, (d)dual-mono, (m)ono
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default is (j) or (s) depending on bitrate
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joint = joins the best possible of MS and LR stereo
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simple = force LR stereo on all frames
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force = force MS stereo on all frames.
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--preset type type must be "medium", "standard", "extreme", "insane",
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or a value for an average desired bitrate and depending
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on the value specified, appropriate quality settings will
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be used.
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"--preset help" gives more info on these
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--comp <arg> choose bitrate to achive a compression ratio of <arg>
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--replaygain-fast compute RG fast but slightly inaccurately (default)
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--replaygain-accurate compute RG more accurately and find the peak sample
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--noreplaygain disable ReplayGain analysis
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--clipdetect enable --replaygain-accurate and print a message whether
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clipping occurs and how far the waveform is from full scale
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--flush flush output stream as soon as possible
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--freeformat produce a free format bitstream
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--decode input=mp3 file, output=wav
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-t disable writing wav header when using --decode
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Verbosity:
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--disptime <arg>print progress report every arg seconds
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-S don't print progress report, VBR histograms
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--nohist disable VBR histogram display
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--silent don't print anything on screen
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--quiet don't print anything on screen
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--brief print more useful information
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--verbose print a lot of useful information
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Noise shaping & psycho acoustic algorithms:
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-q <arg> <arg> = 0...9. Default -q 5
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-q 0: Highest quality, very slow
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-q 9: Poor quality, but fast
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-h Same as -q 2. Recommended.
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-f Same as -q 7. Fast, ok quality
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CBR (constant bitrate, the default) options:
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-b <bitrate> set the bitrate in kbps, default 128 kbps
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--cbr enforce use of constant bitrate
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ABR options:
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--abr <bitrate> specify average bitrate desired (instead of quality)
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VBR options:
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-V n quality setting for VBR. default n=4
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0=high quality,bigger files. 9=smaller files
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-v the same as -V 4
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--vbr-old use old variable bitrate (VBR) routine
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--vbr-new use new variable bitrate (VBR) routine (default)
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-b <bitrate> specify minimum allowed bitrate, default 32 kbps
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-B <bitrate> specify maximum allowed bitrate, default 320 kbps
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-F strictly enforce the -b option, for use with players that
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do not support low bitrate mp3
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-t disable writing LAME Tag
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-T enable and force writing LAME Tag
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PSY related:
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--temporal-masking x x=0 disables, x=1 enables temporal masking effect
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--nssafejoint M/S switching criterion
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--nsmsfix <arg> M/S switching tuning [effective 0-3.5]
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--interch x adjust inter-channel masking ratio
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--ns-bass x adjust masking for sfbs 0 - 6 (long) 0 - 5 (short)
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--ns-alto x adjust masking for sfbs 7 - 13 (long) 6 - 10 (short)
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--ns-treble x adjust masking for sfbs 14 - 21 (long) 11 - 12 (short)
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--ns-sfb21 x change ns-treble by x dB for sfb21
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experimental switches:
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-Y lets LAME ignore noise in sfb21, like in CBR
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MP3 header/stream options:
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-e <emp> de-emphasis n/5/c (obsolete)
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-c mark as copyright
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-o mark as non-original
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-p error protection. adds 16 bit checksum to every frame
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(the checksum is computed correctly)
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--nores disable the bit reservoir
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--strictly-enforce-ISO comply as much as possible to ISO MPEG spec
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Filter options:
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--lowpass <freq> frequency(kHz), lowpass filter cutoff above freq
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--lowpass-width <freq> frequency(kHz) - default 15% of lowpass freq
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--highpass <freq> frequency(kHz), highpass filter cutoff below freq
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--highpass-width <freq> frequency(kHz) - default 15% of highpass freq
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--resample <sfreq> sampling frequency of output file(kHz)- default=automatic
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ID3 tag options:
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--tt <title> audio/song title (max 30 chars for version 1 tag)
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--ta <artist> audio/song artist (max 30 chars for version 1 tag)
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--tl <album> audio/song album (max 30 chars for version 1 tag)
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--ty <year> audio/song year of issue (1 to 9999)
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--tc <comment> user-defined text (max 30 chars for v1 tag, 28 for v1.1)
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--tn <track[/total]> audio/song track number and (optionally) the total
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number of tracks on the original recording. (track
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and total each 1 to 255. just the track number
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creates v1.1 tag, providing a total forces v2.0).
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--tg <genre> audio/song genre (name or number in list)
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--ti <file> audio/song albumArt (jpeg/png/gif file, 128KB max, v2.3)
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--tv <id=value> user-defined frame specified by id and value (v2.3 tag)
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--add-id3v2 force addition of version 2 tag
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--id3v1-only add only a version 1 tag
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--id3v2-only add only a version 2 tag
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--space-id3v1 pad version 1 tag with spaces instead of nulls
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--pad-id3v2 same as '--pad-id3v2-size 128'
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--pad-id3v2-size <value> adds version 2 tag, pad with extra <value> bytes
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--genre-list print alphabetically sorted ID3 genre list and exit
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--ignore-tag-errors ignore errors in values passed for tags
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Note: A version 2 tag will NOT be added unless one of the input fields
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won't fit in a version 1 tag (e.g. the title string is longer than 30
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characters), or the '--add-id3v2' or '--id3v2-only' options are used,
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or output is redirected to stdout.
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MS-Windows-specific options:
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--priority <type> sets the process priority:
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0,1 = Low priority (IDLE_PRIORITY_CLASS)
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2 = normal priority (NORMAL_PRIORITY_CLASS, default)
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3,4 = High priority (HIGH_PRIORITY_CLASS))
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Note: Calling '--priority' without a parameter will select priority 0.
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Misc:
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--license print License information
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Platform specific:
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--noasm <instructions> disable assembly optimizations for mmx/3dnow/sse
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MPEG-1 layer III sample frequencies (kHz): 32 48 44.1
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bitrates (kbps): 32 40 48 56 64 80 96 112 128 160 192 224 256 320
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MPEG-2 layer III sample frequencies (kHz): 16 24 22.05
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bitrates (kbps): 8 16 24 32 40 48 56 64 80 96 112 128 144 160
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MPEG-2.5 layer III sample frequencies (kHz): 8 12 11.025
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bitrates (kbps): 8 16 24 32 40 48 56 64
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