[推荐]quicktime aac 或许比NEROAAC更好更强大

引用

qtaacenc: a command-line QuickTime AAC encoder for Windows
Last modified: 2010/7/25
What is this?

qtaacenc is a command-line utility for Windows to encode audio files with QuickTime AAC encoder. It enables us to access the true VBR encoder which is not available in iTunes.
Requirements

* Windows XP or later (?)
* QuickTime 7.6.5 or later
* Note: older version of QuickTime isn't supported. Please install the latest version. You don't have to install iTunes. VC2008 runtime
will be required on some systems.

How to use

> qtaacenc.exe [options] infile [outfile]

Without any option, qtaacenc encodes the input file in True VBR quality 65. The output file is saved in the current directory.

You can specify the following options:

--cbr bitrate
Encode the input file in CBR mode. Available bitrate range is 16-320kbps(stereo), 8-256kbps(mono).
--abr bitrate
Encode the input file in ABR mode. Available bitrate range is 16-320kbps(stereo), 8-256kbps(mono).
--cvbr bitrate
Encode the input file in Constrained VBR mode. Available bitrate range is 16-320kbps(stereo), 8-256kbps(mono).
--tvbr quality
Encode the input file in True VBR mode. Available quality range is 0-127. [default]
--he
Enable the high efficiency (HE-AAC) encoder. Cannot used with True VBR mode.
--samplerate auto | keep | value
Control the samplerate of the output file.

* auto
* Automatically choose the optimum samplerate according to the bitrate and quality. [default] keep
* Keep the original samplerate (if possible). value
Specify the preferred samplerate in Hz. Allowed values are: 8000, 11250, 12000, 16000, 22050, 24000, 32000, 44100, 48000

--fastest
Choose the profile for the fastest encoding speed (identical to --fast in the current QT AAC encoder).
--fast
Choose the profile focused on the encoding speed.
--normal
Choose the profile with moderate speed and quality.
--high
Choose the profile focused on the encoding quality. [default]
--highest
Choose the profile for the highest encoding quality (identical to --high in the current QT AAC encoder).
--title string
Set the title tag.
--artist string
Set the artist tag.
--album string
Set the album title tag.
--albumartist string
Set the album artist tag.
--genre string
Set the genre tag.
--date string
Set the release date tag.
--composer string
Set the composer tag.
--grouping string
Set the grouping tag.
--comment string
Set the commnet tag.
--track number[/total]
Set the track number tag.
--disc number[/total]
Set the disc number tag.
--compilation
Set the compilation flag.
--ignorelength
Ignore the size of data chunk when encoding from pipe.
--quiet
Do not print the progress.

Pipe Encoding

By passing - as infile, qtaacenc reads the input file from stdin. This is useful when you want to encode the file from other applications using pipe. In this case, the input format should be RIFF WAVE containing linear PCM.
Examples

> qtaacenc.exe --abr 160 foo.wav

Encode foo.wav with ABR 160kbps, and save as foo.m4a in the current directory.

> qtaacenc.exe --tvbr 100 --highest C:foo.wav bar.m4a

Encode C:foo.wav with true VBR quality 100, highest quality profile, and save as bar.m4a in the current directory.
Cooperation with foobar2000

qtaacenc can be used as a custom command-line encoder in foobar2000. See the picture below for the example of configurations.

Any comments or questions are accepted in the thread in Hydrogenaudio. Of course you can directly contact me.
Limitations

* Cannot encode with odd bitrates, like 125kbps [QuickTime-side problem]

引用

qaac is a command line AAC/ALAC encoder using QuickTime API, strongly influenced by http://tmkk.hp.infoseek.co.jp/qtaacenc/.

* Can read WAV, AIFF, AU, RawPCM, FLAC, Wavpack, ALAC. Cuesheet(*.cue) is also supported from version 0.05.
In fact, qaac uses libsndfile, so every PCM format supported by libsndfile is also supported by qaac.
* Encodes as AAC-LC / AAC-HE / ALAC into standard ISO MP4 container.
* As for AAC, ADTS output is also supported from version 0.06.
* As for WAV, AIFF, AU, RawPCM: pipe input is supported.
* As for AIFF, FLAC, Wavpack, ALAC: embedded tags can be automatically pulled (not all).
* Can process multiple input files, wild card can be used.

Download latest version from here. You only have to download qaac-x.xx.zip, if you don't want to compile/browse source codes at all. Of course, you must install the latest Apple QuickTime to run the app.

qaac uses following libraries.

* Apple QuickTime SDK
* libmp4v2 (modified)
* libsndfile
* FLAC
* wavpack
* libid3tag
* GNU getopt (modified)
* boost

Usage: qaac [options] infiles....

"-" as infile means stdin.
In ADTS output mode, "-" as outfile means stdout.

Main options:
-d Output directory, default is cwd
-a, --abr AAC ABR mode / bitrate
-V, --tvbr AAC True VBR mode / quality [0-127]
-v, --cvbr AAC Constrained VBR mode / bitrate
-c, --cbr AAC CBR mode / bitrate
--he HE AAC mode (Can't use TVBR)
-A, --alac ALAC encoding mode
-q, --quality AAC encoding Quality [0-2]
-r, --rate Sample rate option (AAC only)
Specify one of the followings:
keep: Try to preserve the original rate
auto: Let QuickTime choose the optimal one
: Literal rate in Hz
-s, --silent Don't be verbose
-n, --nice Give lower process priority
--downmix Downmix to mono/stereo
--adts ADTS(raw AAC)output, instead of m4a(AAC only)
--ignorelength Assume WAV input and ignore the data chunk length
-R, --raw Raw PCM input
-S, --stat Save bitrate statistics into file

Options for single input mode only:
-o Output filename

Options for Raw PCM input only:
--raw-channels Number of channels, default 2
--raw-rate Sample rate, default 44100
--raw-format Sample format, default S16L
Sample format spec:
1st char: S(igned) | U(nsigned) | F(loat)
2nd part: Bitwidth
Last part: L(ittle Endian) | B(ig Endian)
Cases are ignored. u8b is OK.

Tagging options(single input only):
--title
--artist
--band
--album
--grouping
--composer
--comment
--genre
--date
--track
--disk
--compilation

引用

最初由 roozhou 发布
divx用的是mainconcept的编码器，MC的编码器质量很差，不比那个faac好多少。