Faac

FAAC is an open-source, dependency-free AAC encoder aimed at embedded and
pipeline use cases where footprint and throughput matter as much as quality.
Key features:

    MPEG-4 AAC-LC and HE-AAC v1 (SBR) profiles
    Sample rates from 8 kHz to 96 kHz, supporting mono up to 5.1 multichannel
    VBR and ABR rate control with a bit reservoir
    Advanced encoding tools: Dynamic block-switching, PNS, and TNS
    Flexible output options: Raw ADTS, ADIF bitstream

This package contains the frontend.

Usage: faac [options] infile

Help options:
	-h		Short help on using FAAC
	-H		Description of all options for FAAC.
	--license	License terms for FAAC.
	--help-qual	Quality-related options
	--help-io	Input/output options
	--help-mp4	MP4 specific options
	--help-advanced	Advanced options, only for testing purposes
Quality-related options:
    -q <quality>	Set encoding quality.
		Set default variable bitrate (VBR) quantizer quality in percent.
		max. 5000, min. 10.
		default: 100, averages at approx. 120 kbps VBR for a normal
		stereo input file with 16 bit and 44.1 kHz sample rate
    -b <bitrate>	Set average bitrate to x kbps. (ABR)
		Set average bitrate (ABR) to approximately <bitrate> kbps.
		max. ~500 (stereo)
    -c <freq>	Set the bandwidth in Hz.
		The actual frequency is adjusted to maximize upper spectral band
		usage.


Input/output options:
    -o <filename>	Set output file to X (only for one input file)
		only for one input file; you can use *.aac, *.mp4, *.m4a or
		*.m4b as file extension, and the file format will be set
		automatically to ADTS or MP4).
    -		Use stdin/stdout
		If you simply use a hyphen/minus sign instead
		of a filename, FAAC can encode directly from stdin,
		thus enabling piping from other applications and utilities. The
		same works for stdout as well, so FAAC can pipe its output to
		other apps such as a server.
    -v <verbose>		verbosity level (-v0 is quiet mode)
    -r		Use RAW AAC output file.
		Generate raw AAC bitstream (i.e. without any headers).
		Not advised!!!, RAW AAC files are practically useless!!!
    -P		Raw PCM input mode (default 44100Hz 16bit stereo).
		Raw PCM input mode (default: off, i.e. expecting a WAV header;
		necessary for input files or bitstreams without a header; using
		only -P assumes the default values for -R, -B and -C in the
		input file).
    -R <samplerate>	Raw PCM input rate.
		Raw PCM input sample rate in Hz (default: 44100 Hz, max. 96 kHz)
    -B <samplebits>	Raw PCM input sample size (8, 16 (default), 24 or 32bits).
		Raw PCM input sample size (default: 16, also possible 8, 24, 32
		bit fixed or float input).
    -C <channels>	Raw PCM input channels.
		Raw PCM input channels (default: 2, max. 8).
    -X		Raw PCM swap input bytes
		Raw PCM swap input bytes (default: bigendian).
    -I <C[,LFE]>	Input channel config, default is 3,4 (Center third, LF fourth)
		Input multichannel configuration (default: 3,4 which means
		Center is third and LFE is fourth like in 5.1 WAV, so you only
		have to specify a different position of these two mono channels
		in your multichannel input files if they haven't been reordered
		already).
    --ignorelength	Ignore wav length from header (useful with files over 4 GB)
    --overwrite		Overwrite existing output file

MP4 specific options:
    -w	Wrap AAC data in MP4 container (default for *.mp4, *.m4a and *.m4b)
    --tag <tagname,tagvalue> Add named tag (iTunes '----')
    --artist <name>	Set artist name
    --artistsort <name>	Set artist sort order
    --composer <name>	Set composer name
    --composersort <name>	Set composer sort order
    --title <name>	Set title/track name
    --genre <number>	Set genre number
    --album <name>	Set album/performer
    --albumartist <name>	Set album artist
    --albumartistsort <name>	Set album artist sort order
    --albumsort <name>	Set album sort order
    --compilation	Mark as compilation
    --track <number/total>	Set track number
    --disc <number/total>	Set disc number
    --year <number>	Set year
    --cover-art <filename>	Read cover art from file X
		Supported image formats are GIF, JPEG, and PNG.
    --comment <string>	Set comment
    --creation-time <value>	Set creation/modification time (auto, now, or
timestamp)


Advanced options, only for testing purposes:
    --tns  	Enable coding of TNS, temporal noise shaping.
    --no-tns	Disable coding of TNS, temporal noise shaping.
    --joint 0	Disable joint stereo coding.
    --joint 1	Use Mid/Side coding.
    --joint 2	Use Intensity Stereo coding.
    --joint 3	Use Mixed Mode (dynamic M/S and IS) coding (default).
    --pns <0 .. 10>	PNS level; 0=disabled.
    --mpeg-vers X	Force AAC MPEG version, X can be 2 or 4
    --object-type X	Force AAC object type: lc, he-aac-v1, or auto (default)
    --shortctl X	Enforce block type (0 = both (default); 1 = no short; 2 = no
		long).