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<[email protected]> |
On Oct 15, 2018, at 4:45 PM, [email protected] [EAC] <[email protected]> wrote:
> I would like to change the compression options to 256 kbps VBR but when I select that bitrate, I still get files around the average of 192.
>
Are you saying that you want to specify VBR with a maximum bitrate of 256kbps, or do you really want to specify an average bitrate (ABR)? If it’s the latter, look at the “—ABR” option below.
> I don't see any option to select VBR
>
There isn’t one.
> and I am not familiar with creating a command line on my own.
>
Then let’s start there, since that’s a basic skill everyone who uses a computer should have. Here are the options for LAME:
> Freds-iMac-Pro-3:~ Fred$ lame --longhelp
> LAME 64bits version 3.100 (http://lame.sf.net)
>
> usage: lame [options] <infile> [outfile]
>
> <infile> and/or <outfile> can be "-", which means stdin/stdout.
>
> RECOMMENDED:
> lame -V2 input.wav output.mp3
>
> OPTIONS:
> Input options:
> --scale <arg> scale input (multiply PCM data) by <arg>
> --scale-l <arg> scale channel 0 (left) input (multiply PCM data) by <arg>
> --scale-r <arg> scale channel 1 (right) input (multiply PCM data) by <arg>
> --swap-channel swap L/R channels
> --ignorelength ignore file length in WAV header
> --gain <arg> apply Gain adjustment in decibels, range -20.0 to +12..0
> --mp1input input file is a MPEG Layer I file
> --mp2input input file is a MPEG Layer II file
> --mp3input input file is a MPEG Layer III file
> --nogap <file1> <file2> <...>
> gapless encoding for a set of contiguous files
> --nogapout <dir>
> output dir for gapless encoding (must precede --nogap)
> --nogaptags allow the use of VBR tags in gapless encoding
> --out-dir <dir> output dir, must exist
>
> Input options for RAW PCM:
> -r input is raw pcm
> -s sfreq sampling frequency of input file (kHz) - default 44.1 kHz
> --signed input is signed (default)
> --unsigned input is unsigned
> --bitwidth w input bit width is w (default 16)
> -x force byte-swapping of input
> --little-endian input is little-endian (default)
> --big-endian input is big-endian
> -a downmix from stereo to mono file for mono encoding
>
>
> Operational options:
> -m <mode> (j)oint, (s)imple, (f)orce, (d)ual-mono, (m)ono (l)eft (r)ight
> default is (j)
> joint = Uses the best possible of MS and LR stereo
> simple = force LR stereo on all frames
> force = force MS stereo on all frames.
> --preset type type must be "medium", "standard", "extreme", "insane",
> or a value for an average desired bitrate and depending
> on the value specified, appropriate quality settings will
> be used.
> "--preset help" gives more info on these
> --comp <arg> choose bitrate to achieve a compression ratio of <arg>
> --replaygain-fast compute RG fast but slightly inaccurately (default)
> --replaygain-accurate compute RG more accurately and find the peak sample
> --noreplaygain disable ReplayGain analysis
> --clipdetect enable --replaygain-accurate and print a message whether
> clipping occurs and how far the waveform is from full scale
> --flush flush output stream as soon as possible
> --freeformat produce a free format bitstream
> --decode input=mp3 file, output=wav
> -t disable writing wav header when using --decode
>
>
> Verbosity:
> --disptime <arg>print progress report every arg seconds
> -S don't print progress report, VBR histograms
> --nohist disable VBR histogram display
> --quiet don't print anything on screen
> --silent don't print anything on screen, but fatal errors
> --brief print more useful information
> --verbose print a lot of useful information
>
> Noise shaping & psycho acoustic algorithms:
> -q <arg> <arg> = 0...9. Default -q 3
> -q 0: Highest quality, very slow
> -q 9: Poor quality, but fast
> -h Same as -q 2.
> -f Same as -q 7. Fast, ok quality
>
>
> CBR (constant bitrate, the default) options:
> -b <bitrate> set the bitrate in kbps, default 128 kbps
> --cbr enforce use of constant bitrate
>
> ABR options:
> --abr <bitrate> specify average bitrate desired (instead of quality)
>
> VBR options:
> -V n quality setting for VBR. default n=4
> 0=high quality,bigger files. 9=smaller files
> -v the same as -V 4
> --vbr-old use old variable bitrate (VBR) routine
> --vbr-new use new variable bitrate (VBR) routine (default)
> -Y lets LAME ignore noise in sfb21, like in CBR
> (Default for V3 to V9.999)
> -b <bitrate> specify minimum allowed bitrate, default 32 kbps
> -B <bitrate> specify maximum allowed bitrate, default 320 kbps
> -F strictly enforce the -b option, for use with players that
> do not support low bitrate mp3
> -t disable writing LAME Tag
> -T enable and force writing LAME Tag
>
>
> MP3 header/stream options:
> -e <emp> de-emphasis n/5/c (obsolete)
> -c mark as copyright
> -o mark as non-original
> -p error protection. adds 16 bit checksum to every frame
> (the checksum is computed correctly)
> --nores disable the bit reservoir
> --strictly-enforce-ISO comply as much as possible to ISO MPEG spec
> --buffer-constraint <constraint> available values for constraint:
> default, strict, maximum
>
> Filter options:
> --lowpass <freq> frequency(kHz), lowpass filter cutoff above freq
> --lowpass-width <freq> frequency(kHz) - default 15% of lowpass freq
> --highpass <freq> frequency(kHz), highpass filter cutoff below freq
> --highpass-width <freq> frequency(kHz) - default 15% of highpass freq
> --resample <sfreq> sampling frequency of output file(kHz)- default=automatic
>
>
> ID3 tag options:
> --tt <title> audio/song title (max 30 chars for version 1 tag)
> --ta <artist> audio/song artist (max 30 chars for version 1 tag)
> --tl <album> audio/song album (max 30 chars for version 1 tag)
> --ty <year> audio/song year of issue (1 to 9999)
> --tc <comment> user-defined text (max 30 chars for v1 tag, 28 for v1..1)
> --tn <track[/total]> audio/song track number and (optionally) the total
> number of tracks on the original recording. (track
> and total each 1 to 255. just the track number
> creates v1.1 tag, providing a total forces v2.0).
> --tg <genre> audio/song genre (name or number in list)
> --ti <file> audio/song albumArt (jpeg/png/gif file, v2.3 tag)
> --tv <id=value> user-defined frame specified by id and value (v2.3 tag)
> syntax: --tv "TXXX=description=content"
> --add-id3v2 force addition of version 2 tag
> --id3v1-only add only a version 1 tag
> --id3v2-only add only a version 2 tag
> --id3v2-utf16 add following options in unicode text encoding
> --id3v2-latin1 add following options in latin-1 text encoding
> --space-id3v1 pad version 1 tag with spaces instead of nulls
> --pad-id3v2 same as '--pad-id3v2-size 128'
> --pad-id3v2-size <value> adds version 2 tag, pad with extra <value> bytes
> --genre-list print alphabetically sorted ID3 genre list and exit
> --ignore-tag-errors ignore errors in values passed for tags
>
> Note: A version 2 tag will NOT be added unless one of the input fields
> won't fit in a version 1 tag (e.g. the title string is longer than 30
> characters), or the '--add-id3v2' or '--id3v2-only' options are used,
> or output is redirected to stdout.
>
> Misc:
> --license print License information
>
>
> MPEG-1 layer III sample frequencies (kHz): 32 48 44.1
> bitrates (kbps): 32 40 48 56 64 80 96 112 128 160 192 224 256 320
>
> MPEG-2 layer III sample frequencies (kHz): 16 24 22.05
> bitrates (kbps): 8 16 24 32 40 48 56 64 80 96 112 128 144 160
>
> MPEG-2.5 layer III sample frequencies (kHz): 8 12 11.025
> bitrates (kbps): 8 16 24 32 40 48 56 64
Your command line should be constructed with those options shown above that you wish to use.
> I attached a picture of my current settings. The additional command line is the one that was already set in there when I downloaded it.
>
Your image cuts off the command line options. But your command line options are overriding your drop-down selection. Specifically, if the quality selected is low, then the parameter passed is “-V 5” and if it’s high quality, then the parameter is “-V 2.” That’s VBR based on quality settings ranging from 0-9. (as you can see above: "0=high quality,bigger files. 9=smaller files."
So, come up with a command line that you think should work and give it a try. If you have problems or need additional help, post the command line here and explain what problems you’re seeing. We’ll be happy to help.
Regards,
Fred Maxwell
Moderator, Exact Audio Copy Yahoogroup