Hydrogenaudio Knowledgebase - User contributions [en]

EAC and AAC (neroAac)

2011-02-13T16:27:59Z

Greenpistachio: /* Configuration */

{{stub}}

This page is a compression gude for configuring [[Nero AAC]] encoder with EAC for greater encoding flexibility. This guide will allow you to create Nero AAC files that will be compatible with [[ITunes]] and your IPod or any other digital audio player capable of playing AAC files.

= Software Needed =
* [http://www.exactaudiocopy.de/en/index.php/resources/download/ Exact Audio Copy]
* [http://www.nero.com/eng/nero-aac-codec.html Nero AAC 1.1.34.2]

= Installation =
'''Note:''' This guide assumes that EAC is has been configured for secure ripping, if not please follow [[EAC_Drive_Configuration | this]] guide.
* Unzip the chosen neroaacenc.exe build into the same directory that EAC is in (Note you can use regular build or the SSE optimized version that comes in the zip file).

= Configuration =
* Open EAC and insert a CD into the drive.
* Click the '''EAC''' menu and select '''Compression Options'''.
* Click the '''External Compression''' Tab, and put a check box in '''use external program for compression'''.
* Change '''Parameter Passing Scheme''' to '''User Defined Encoder'''.
* Change '''Use file extension''' to '''.m4a'''
'''Note: Remember to use .m4a extension so that ITunes can read your metadata tags!'''
* Click the '''Browse''' button and locate the '''neroaacenc.exe''' that you unzipped earlier.
* Remove the ticks from '''Use CRC check''', '''Add ID3 tag''' and '''check for external programs return code'''.
* In the '''Additional command line options''' box, copy and paste one of the below strings based on the Tag you would prefer.

No Tags:

<div style="margin-left:30px; margin-right:30px;">'''<font style="color:green">-q 0.5</font>''' -if %s -of %d
</div>

Metadata Tags:

'''Note: The information is below is incomplete and needs to verified correctly'''

<div style="margin-left:30px; margin-right:30px;">path for compression: C:\Windows\system32\cmd.exe
</div>

additional commands:
<div style="margin-left:30px; margin-right:30px;">/c C:\path\to\neroaacenc.exe '''<font style="color:green">-q 0.425</font>''' -if %s -of %d && C:\path\to\Neroaactag.exe %d - meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y"
</div>

You need to substitute '''path''' and '''to''' to wherever you have placed the executable above. The above code invokes the windows command-line and tells EAC how to properly encode and tag your files. You can replace the '''-q''' value with a value from 0.05 to 0.95 (any fractions in between are acceptable) for what bitrate corresponds with what quality level [http://www.hydrogenaudio.org/forums/index.php?showtopic=44310 read here] or [http://wiki.hydrogenaudio.org/index.php?title=NeroAAC#Quality.2Fbitrate_control here]

IMAGE NEEDED

== External links ==
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=44310 Sticky thread] this thread show's you how to use Nero AAC encoder with various program for Windows.
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=44275&st=0 Forum thread of first release of Nero AAC encoder]the first official release of Nero AAC encoder on Hydrogenaudio.

[[Category:EAC Guides]]

NeroAAC

2010-12-03T02:20:46Z

Greenpistachio: /* Multipass encoding */

{{merge-to|Nero_AAC}}

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a commercial implementation of both LC AAC and HE AAC and provided as a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

It is generally percieved to have the highest quality [[VBR]] LC AAC implementation (although QuickTime bests it in [[CBR]] mode at 128kbps). The codec can also create HEv1/v2 AAC streams for extremely low bitrates and supports multi-channel surround sound encoding.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.<br><small>Using two-pass encoding is not recommended when using VBR.</small>
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) are not required and should normally not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. A scenario where using the switches might be useful is to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 file's meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

=== Usage ===

Windows:
<pre>neroAacTag.exe <file.mp4> <command> [<command> [<command> ...]]</pre>

==== Available commands ====
; <tt>-list-meta</tt>
: Lists existing metadata entries.
; <tt>-meta:<name>=<value></tt>
: Sets specified metadata field to specified value. Eg. -meta:artist="Pink Floyd"
; <tt>-meta-user:<name>=<value></tt>
: Sets specified metadata field to specified value. Allows non-standard metadata fields to be added.<br>'''WARNING''': fields added using -meta-user are not guaranteed to be read back on all Nero Digital compliant software/hardware.
; <tt>-list-standard-meta</tt>
: Displays a list of field names usable with -meta command.
; <tt>-list-standard-itunes-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-standard-memorystick-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-covers</tt>
: Lists cover art entries.
; <tt>-write-nd-covers</tt>
: Write cover art also to ND tags. Default is to write only to iTunes tags.
; <tt>-add-cover:<type>:<jpegfile></tt>
: Creates a cover art entry from specified JPEG file. <tt><type></tt> specifies type of cover art entry and can be "front" or "back". If specified cover art entry already exists, its contents are overwritten. Eg. <tt>-add-cover:back:hello.jpg</tt>
; <tt>-dump-cover:<type>:<jpegfile></tt>
: Dumps specified cover art entry contents to a JPEG file.
; <tt>-remove-cover:<type></tt>
: Removes specified cover art entry.
; <tt>-remove-cover:all</tt>
: Removes all cover art entries.
; <tt>-list-chapters</tt>
: Lists chapters present in the file.
; <tt>-chapter:<number></tt>
: Sets chapter index metadata edits apply to. Value of 0 (default state) applies edits to all present chapters. Also affects <tt>-list-meta</tt> output.
; <tt>-chapters-to-tracknumbers</tt>
: Generates track number metadata according to the chapter list.

=== Notes ===

neroAacTag has a bug. Meta tag values that contain one or more semi-colons (;) will get split up into multiples of that tag.

For example, you run the following command:

<pre>
neroAacTag test.m4a -meta:artist="Artist A; Artist B; Artist C"
</pre>

Instead of having a single artist tag listing all three artists (<tt>artist="Artist A; Artist B; Artist C"</tt>), you get three artist tags with an artist listed in each (<tt>artist="Artist A" artist=" Artist B" artist=" Artist C"</tt>).

neroAacTag will show your tag as correctly applied but iTunes or Mp3tag will not see that. (Mp3tag will show you the duplicate tags in the Extended tags view.)

==Example EAC Settings==

The following settings are examples of what one might use for music and spoken word sources, respectively. Files will be tagged properly using these commands via neroaactag.exe. These commands do run ReplayGain on the files.

===320kbps CBR AAC (Forced LC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\path\to\neroaacenc.exe" -cbr 320000 -lc -if %s -of %d && "C:\path\to\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

===Q0.3 VBR AAC (Forced HC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\Program Files\Exact Audio Copy\neroaacenc.exe" -q 0.3 -hc -if %s -of %d && "C:\Program Files\Exact Audio Copy\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

== Nero AAC in Foobar ==

The Nero AAC Codec can be used inside Foobar2000's convert function.

== References ==

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44310 Recommended Settings Sticky]

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44283 Discussion Thread for the Recommended Setting Sticky]

NeroAAC

2010-12-03T02:19:25Z

Greenpistachio:

{{merge-to|Nero_AAC}}

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a commercial implementation of both LC AAC and HE AAC and provided as a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

It is generally percieved to have the highest quality [[VBR]] LC AAC implementation (although QuickTime bests it in [[CBR]] mode at 128kbps). The codec can also create HEv1/v2 AAC streams for extremely low bitrates and supports multi-channel surround sound encoding.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) are not required and should normally not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. A scenario where using the switches might be useful is to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 file's meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

=== Usage ===

Windows:
<pre>neroAacTag.exe <file.mp4> <command> [<command> [<command> ...]]</pre>

==== Available commands ====
; <tt>-list-meta</tt>
: Lists existing metadata entries.
; <tt>-meta:<name>=<value></tt>
: Sets specified metadata field to specified value. Eg. -meta:artist="Pink Floyd"
; <tt>-meta-user:<name>=<value></tt>
: Sets specified metadata field to specified value. Allows non-standard metadata fields to be added.<br>'''WARNING''': fields added using -meta-user are not guaranteed to be read back on all Nero Digital compliant software/hardware.
; <tt>-list-standard-meta</tt>
: Displays a list of field names usable with -meta command.
; <tt>-list-standard-itunes-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-standard-memorystick-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-covers</tt>
: Lists cover art entries.
; <tt>-write-nd-covers</tt>
: Write cover art also to ND tags. Default is to write only to iTunes tags.
; <tt>-add-cover:<type>:<jpegfile></tt>
: Creates a cover art entry from specified JPEG file. <tt><type></tt> specifies type of cover art entry and can be "front" or "back". If specified cover art entry already exists, its contents are overwritten. Eg. <tt>-add-cover:back:hello.jpg</tt>
; <tt>-dump-cover:<type>:<jpegfile></tt>
: Dumps specified cover art entry contents to a JPEG file.
; <tt>-remove-cover:<type></tt>
: Removes specified cover art entry.
; <tt>-remove-cover:all</tt>
: Removes all cover art entries.
; <tt>-list-chapters</tt>
: Lists chapters present in the file.
; <tt>-chapter:<number></tt>
: Sets chapter index metadata edits apply to. Value of 0 (default state) applies edits to all present chapters. Also affects <tt>-list-meta</tt> output.
; <tt>-chapters-to-tracknumbers</tt>
: Generates track number metadata according to the chapter list.

=== Notes ===

neroAacTag has a bug. Meta tag values that contain one or more semi-colons (;) will get split up into multiples of that tag.

For example, you run the following command:

<pre>
neroAacTag test.m4a -meta:artist="Artist A; Artist B; Artist C"
</pre>

Instead of having a single artist tag listing all three artists (<tt>artist="Artist A; Artist B; Artist C"</tt>), you get three artist tags with an artist listed in each (<tt>artist="Artist A" artist=" Artist B" artist=" Artist C"</tt>).

neroAacTag will show your tag as correctly applied but iTunes or Mp3tag will not see that. (Mp3tag will show you the duplicate tags in the Extended tags view.)

==Example EAC Settings==

The following settings are examples of what one might use for music and spoken word sources, respectively. Files will be tagged properly using these commands via neroaactag.exe. These commands do run ReplayGain on the files.

===320kbps CBR AAC (Forced LC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\path\to\neroaacenc.exe" -cbr 320000 -lc -if %s -of %d && "C:\path\to\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

===Q0.3 VBR AAC (Forced HC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\Program Files\Exact Audio Copy\neroaacenc.exe" -q 0.3 -hc -if %s -of %d && "C:\Program Files\Exact Audio Copy\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

== Nero AAC in Foobar ==

The Nero AAC Codec can be used inside Foobar2000's convert function.

== References ==

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44310 Recommended Settings Sticky]

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44283 Discussion Thread for the Recommended Setting Sticky]

NeroAAC

2010-12-03T02:18:38Z

Greenpistachio: /* Notes */

{{merge-to|Nero_AAC}}

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a commercial implementation of both LC AAC and HE AAC and provided as a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

It is generally percieved to have the highest quality [[VBR]] LC AAC implementation (although QuickTime bests it in [[CBR]] mode at 128kbps). The codec can also create HEv1/v2 AAC streams for extremely low bitrates and supports multi-channel surround sound encoding.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

<span style="color:red">'''This article is still a work in progress'''</span>

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) are not required and should normally not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. A scenario where using the switches might be useful is to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 file's meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

=== Usage ===

Windows:
<pre>neroAacTag.exe <file.mp4> <command> [<command> [<command> ...]]</pre>

==== Available commands ====
; <tt>-list-meta</tt>
: Lists existing metadata entries.
; <tt>-meta:<name>=<value></tt>
: Sets specified metadata field to specified value. Eg. -meta:artist="Pink Floyd"
; <tt>-meta-user:<name>=<value></tt>
: Sets specified metadata field to specified value. Allows non-standard metadata fields to be added.<br>'''WARNING''': fields added using -meta-user are not guaranteed to be read back on all Nero Digital compliant software/hardware.
; <tt>-list-standard-meta</tt>
: Displays a list of field names usable with -meta command.
; <tt>-list-standard-itunes-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-standard-memorystick-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-covers</tt>
: Lists cover art entries.
; <tt>-write-nd-covers</tt>
: Write cover art also to ND tags. Default is to write only to iTunes tags.
; <tt>-add-cover:<type>:<jpegfile></tt>
: Creates a cover art entry from specified JPEG file. <tt><type></tt> specifies type of cover art entry and can be "front" or "back". If specified cover art entry already exists, its contents are overwritten. Eg. <tt>-add-cover:back:hello.jpg</tt>
; <tt>-dump-cover:<type>:<jpegfile></tt>
: Dumps specified cover art entry contents to a JPEG file.
; <tt>-remove-cover:<type></tt>
: Removes specified cover art entry.
; <tt>-remove-cover:all</tt>
: Removes all cover art entries.
; <tt>-list-chapters</tt>
: Lists chapters present in the file.
; <tt>-chapter:<number></tt>
: Sets chapter index metadata edits apply to. Value of 0 (default state) applies edits to all present chapters. Also affects <tt>-list-meta</tt> output.
; <tt>-chapters-to-tracknumbers</tt>
: Generates track number metadata according to the chapter list.

=== Notes ===

neroAacTag has a bug. Meta tag values that contain one or more semi-colons (;) will get split up into multiples of that tag.

For example, you run the following command:

<pre>
neroAacTag test.m4a -meta:artist="Artist A; Artist B; Artist C"
</pre>

Instead of having a single artist tag listing all three artists (<tt>artist="Artist A; Artist B; Artist C"</tt>), you get three artist tags with an artist listed in each (<tt>artist="Artist A" artist=" Artist B" artist=" Artist C"</tt>).

neroAacTag will show your tag as correctly applied but iTunes or Mp3tag will not see that. (Mp3tag will show you the duplicate tags in the Extended tags view.)

==Example EAC Settings==

The following settings are examples of what one might use for music and spoken word sources, respectively. Files will be tagged properly using these commands via neroaactag.exe. These commands do run ReplayGain on the files.

===320kbps CBR AAC (Forced LC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\path\to\neroaacenc.exe" -cbr 320000 -lc -if %s -of %d && "C:\path\to\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

===Q0.3 VBR AAC (Forced HC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\Program Files\Exact Audio Copy\neroaacenc.exe" -q 0.3 -hc -if %s -of %d && "C:\Program Files\Exact Audio Copy\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

== Nero AAC in Foobar ==

The Nero AAC Codec can be used inside Foobar2000's convert function.

== References ==

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44310 Recommended Settings Sticky]

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44283 Discussion Thread for the Recommended Setting Sticky]

NeroAAC

2010-12-03T02:16:13Z

Greenpistachio: /* Notes */

{{merge-to|Nero_AAC}}

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a commercial implementation of both LC AAC and HE AAC and provided as a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

It is generally percieved to have the highest quality [[VBR]] LC AAC implementation (although QuickTime bests it in [[CBR]] mode at 128kbps). The codec can also create HEv1/v2 AAC streams for extremely low bitrates and supports multi-channel surround sound encoding.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

<span style="color:red">'''This article is still a work in progress'''</span>

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) are not required and should normally not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. A scenario where using the switches might be useful is to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 file's meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

=== Usage ===

Windows:
<pre>neroAacTag.exe <file.mp4> <command> [<command> [<command> ...]]</pre>

==== Available commands ====
; <tt>-list-meta</tt>
: Lists existing metadata entries.
; <tt>-meta:<name>=<value></tt>
: Sets specified metadata field to specified value. Eg. -meta:artist="Pink Floyd"
; <tt>-meta-user:<name>=<value></tt>
: Sets specified metadata field to specified value. Allows non-standard metadata fields to be added.<br>'''WARNING''': fields added using -meta-user are not guaranteed to be read back on all Nero Digital compliant software/hardware.
; <tt>-list-standard-meta</tt>
: Displays a list of field names usable with -meta command.
; <tt>-list-standard-itunes-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-standard-memorystick-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-covers</tt>
: Lists cover art entries.
; <tt>-write-nd-covers</tt>
: Write cover art also to ND tags. Default is to write only to iTunes tags.
; <tt>-add-cover:<type>:<jpegfile></tt>
: Creates a cover art entry from specified JPEG file. <tt><type></tt> specifies type of cover art entry and can be "front" or "back". If specified cover art entry already exists, its contents are overwritten. Eg. <tt>-add-cover:back:hello.jpg</tt>
; <tt>-dump-cover:<type>:<jpegfile></tt>
: Dumps specified cover art entry contents to a JPEG file.
; <tt>-remove-cover:<type></tt>
: Removes specified cover art entry.
; <tt>-remove-cover:all</tt>
: Removes all cover art entries.
; <tt>-list-chapters</tt>
: Lists chapters present in the file.
; <tt>-chapter:<number></tt>
: Sets chapter index metadata edits apply to. Value of 0 (default state) applies edits to all present chapters. Also affects <tt>-list-meta</tt> output.
; <tt>-chapters-to-tracknumbers</tt>
: Generates track number metadata according to the chapter list.

=== Notes ===

neroAacTag has a bug. Meta tag values that contain one or more semi-colons (;) will get split up into multiples of that tag.

For example, you run the following command:

<pre>
neroAacTag test.m4a -meta:artist="Artist A; Artist B; Artist C"
</pre>

Instead of having a single artist tag listing all three artists (<tt>artist="Artist A; Artist B; Artist C"</tt>), you get three artist tags with an artist listed in each (<tt>artist="Artist A" artist=" Artist B" artist=" Artist C"</tt>).

neroAacTag will show your tag as correctly applied but iTunes or MP3Tag will not see that. (MP3Tag will show you the duplicate tags in the Extended tags view.)

==Example EAC Settings==

The following settings are examples of what one might use for music and spoken word sources, respectively. Files will be tagged properly using these commands via neroaactag.exe. These commands do run ReplayGain on the files.

===320kbps CBR AAC (Forced LC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\path\to\neroaacenc.exe" -cbr 320000 -lc -if %s -of %d && "C:\path\to\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

===Q0.3 VBR AAC (Forced HC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\Program Files\Exact Audio Copy\neroaacenc.exe" -q 0.3 -hc -if %s -of %d && "C:\Program Files\Exact Audio Copy\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

== Nero AAC in Foobar ==

The Nero AAC Codec can be used inside Foobar2000's convert function.

== References ==

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44310 Recommended Settings Sticky]

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44283 Discussion Thread for the Recommended Setting Sticky]

NeroAAC

2010-12-03T02:12:57Z

Greenpistachio: /* NeroAacTag */

{{merge-to|Nero_AAC}}

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a commercial implementation of both LC AAC and HE AAC and provided as a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

It is generally percieved to have the highest quality [[VBR]] LC AAC implementation (although QuickTime bests it in [[CBR]] mode at 128kbps). The codec can also create HEv1/v2 AAC streams for extremely low bitrates and supports multi-channel surround sound encoding.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

<span style="color:red">'''This article is still a work in progress'''</span>

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) are not required and should normally not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. A scenario where using the switches might be useful is to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 file's meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

=== Usage ===

Windows:
<pre>neroAacTag.exe <file.mp4> <command> [<command> [<command> ...]]</pre>

==== Available commands ====
; <tt>-list-meta</tt>
: Lists existing metadata entries.
; <tt>-meta:<name>=<value></tt>
: Sets specified metadata field to specified value. Eg. -meta:artist="Pink Floyd"
; <tt>-meta-user:<name>=<value></tt>
: Sets specified metadata field to specified value. Allows non-standard metadata fields to be added.<br>'''WARNING''': fields added using -meta-user are not guaranteed to be read back on all Nero Digital compliant software/hardware.
; <tt>-list-standard-meta</tt>
: Displays a list of field names usable with -meta command.
; <tt>-list-standard-itunes-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-standard-memorystick-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-covers</tt>
: Lists cover art entries.
; <tt>-write-nd-covers</tt>
: Write cover art also to ND tags. Default is to write only to iTunes tags.
; <tt>-add-cover:<type>:<jpegfile></tt>
: Creates a cover art entry from specified JPEG file. <tt><type></tt> specifies type of cover art entry and can be "front" or "back". If specified cover art entry already exists, its contents are overwritten. Eg. <tt>-add-cover:back:hello.jpg</tt>
; <tt>-dump-cover:<type>:<jpegfile></tt>
: Dumps specified cover art entry contents to a JPEG file.
; <tt>-remove-cover:<type></tt>
: Removes specified cover art entry.
; <tt>-remove-cover:all</tt>
: Removes all cover art entries.
; <tt>-list-chapters</tt>
: Lists chapters present in the file.
; <tt>-chapter:<number></tt>
: Sets chapter index metadata edits apply to. Value of 0 (default state) applies edits to all present chapters. Also affects <tt>-list-meta</tt> output.
; <tt>-chapters-to-tracknumbers</tt>
: Generates track number metadata according to the chapter list.

=== Notes ===

neroAacTag has a bug. Meta tag values that contain one or more semi-colons (;) will get split up into multiples of that tag.

For example, you run the following command:

<pre>
neroAacTag test.m4a -meta:artist="Artist A; Artist B; Artist C"
</pre>

Instead of having a single artist tag listing all three artists, you get three artist tags with an artist listed in each.

==Example EAC Settings==

The following settings are examples of what one might use for music and spoken word sources, respectively. Files will be tagged properly using these commands via neroaactag.exe. These commands do run ReplayGain on the files.

===320kbps CBR AAC (Forced LC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\path\to\neroaacenc.exe" -cbr 320000 -lc -if %s -of %d && "C:\path\to\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

===Q0.3 VBR AAC (Forced HC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\Program Files\Exact Audio Copy\neroaacenc.exe" -q 0.3 -hc -if %s -of %d && "C:\Program Files\Exact Audio Copy\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

== Nero AAC in Foobar ==

The Nero AAC Codec can be used inside Foobar2000's convert function.

== References ==

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44310 Recommended Settings Sticky]

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44283 Discussion Thread for the Recommended Setting Sticky]

Talk:Nero AAC

2010-12-03T01:58:33Z

Greenpistachio: /* Merge discussion */

{{talkheader}}

== Merge discussion ==

I did not see the other Nero AAC article until after having created the new one. The old article was somewhat invisible since it was not in any category. I have no problem merging the articles. --[[User:Greenpistachio|Greenpistachio]] 5:46 PM EST, 11/30/2010

: I merged the differences from this article (since it was shorter) into the new article. --[[User:Greenpistachio|Greenpistachio]] 8:57 PM EST, 12/02/2010

==Page Discussion==
I'm not sure whether this should go under "Codecs" or "Encoder/Decoder". --[[User:Pepoluan|pepoluan]] 17:03, 11 September 2006 (CDT)

Shouldn't the additionals below be on the main page rather than here?
Also, I'd like to include more information on usage for mulitchannel (in video files), recommended settings, and profiles. Any recommendations or ideas? Or is this not the correct place. --[[User:Pepoluan|audioffile]] 6:50 PM 5 Jan 08

==Additionals==
Nero Reference Quality MPEG-4 Audio Encoder
[http://www.hydrogenaudio.org/forums/index.php?showtopic=44275&st=40 News Thread]
[http://www.nero.com/nerodigital/eng/Nero_Digital_Audio.html Homepage] [http://www.hydrogenaudio.org/forums/index.php?showtopic=44283 Recommended Settings]
* Command Line
* Requires Windows and a SSE2 Processor (AMD support soon)

NeroAAC

2010-12-03T01:56:32Z

Greenpistachio:

{{merge-to|Nero_AAC}}

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a commercial implementation of both LC AAC and HE AAC and provided as a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

It is generally percieved to have the highest quality [[VBR]] LC AAC implementation (although QuickTime bests it in [[CBR]] mode at 128kbps). The codec can also create HEv1/v2 AAC streams for extremely low bitrates and supports multi-channel surround sound encoding.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

<span style="color:red">'''This article is still a work in progress'''</span>

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) are not required and should normally not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. A scenario where using the switches might be useful is to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 file's meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

=== Usage ===

Windows:
<pre>neroAacTag.exe <file.mp4> <command> [<command> [<command> ...]]</pre>

==== Available commands ====
; <tt>-list-meta</tt>
: Lists existing metadata entries.
; <tt>-meta:<name>=<value></tt>
: Sets specified metadata field to specified value. Eg. -meta:artist="Pink Floyd"
; <tt>-meta-user:<name>=<value></tt>
: Sets specified metadata field to specified value. Allows non-standard metadata fields to be added.<br>'''WARNING''': fields added using -meta-user are not guaranteed to be read back on all Nero Digital compliant software/hardware.
; <tt>-list-standard-meta</tt>
: Displays a list of field names usable with -meta command.
; <tt>-list-standard-itunes-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-standard-memorystick-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-covers</tt>
: Lists cover art entries.
; <tt>-write-nd-covers</tt>
: Write cover art also to ND tags. Default is to write only to iTunes tags.
; <tt>-add-cover:<type>:<jpegfile></tt>
: Creates a cover art entry from specified JPEG file. <tt><type></tt> specifies type of cover art entry and can be "front" or "back". If specified cover art entry already exists, its contents are overwritten. Eg. <tt>-add-cover:back:hello.jpg</tt>
; <tt>-dump-cover:<type>:<jpegfile></tt>
: Dumps specified cover art entry contents to a JPEG file.
; <tt>-remove-cover:<type></tt>
: Removes specified cover art entry.
; <tt>-remove-cover:all</tt>
: Removes all cover art entries.
; <tt>-list-chapters</tt>
: Lists chapters present in the file.
; <tt>-chapter:<number></tt>
: Sets chapter index metadata edits apply to. Value of 0 (default state) applies edits to all present chapters. Also affects <tt>-list-meta</tt> output.
; <tt>-chapters-to-tracknumbers</tt>
: Generates track number metadata according to the chapter list.

==Example EAC Settings==

The following settings are examples of what one might use for music and spoken word sources, respectively. Files will be tagged properly using these commands via neroaactag.exe. These commands do run ReplayGain on the files.

===320kbps CBR AAC (Forced LC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\path\to\neroaacenc.exe" -cbr 320000 -lc -if %s -of %d && "C:\path\to\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

===Q0.3 VBR AAC (Forced HC)===
'''Program, including path, used for compression''': C:\Windows\system32\cmd.exe<br>
'''Additional Command Line Options''': /c ""C:\Program Files\Exact Audio Copy\neroaacenc.exe" -q 0.3 -hc -if %s -of %d && "C:\Program Files\Exact Audio Copy\Neroaactag.exe" %d -meta:artist="%a" -meta:album="%g" -meta:track="%n" -meta:title="%t" -meta:genre="%m" -meta:year="%y""

== Nero AAC in Foobar ==

The Nero AAC Codec can be used inside Foobar2000's convert function.

== References ==

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44310 Recommended Settings Sticky]

[http://www.hydrogenaudio.org/forums/index.php?showtopic=44283 Discussion Thread for the Recommended Setting Sticky]

Talk:Nero AAC

2010-11-30T22:46:58Z

Greenpistachio:

{{talkheader}}

== Merge discussion ==

I did not see the other Nero AAC article until after having created the new one. The old article was somewhat invisible since it was not in any category. I have no problem merging the articles. --[[User:Greenpistachio|Greenpistachio]] 5:46 PM EST, 11/30/2010

==Page Discussion==
I'm not sure whether this should go under "Codecs" or "Encoder/Decoder". --[[User:Pepoluan|pepoluan]] 17:03, 11 September 2006 (CDT)

Shouldn't the additionals below be on the main page rather than here?
Also, I'd like to include more information on usage for mulitchannel (in video files), recommended settings, and profiles. Any recommendations or ideas? Or is this not the correct place. --[[User:Pepoluan|audioffile]] 6:50 PM 5 Jan 08

==Additionals==
Nero Reference Quality MPEG-4 Audio Encoder
[http://www.hydrogenaudio.org/forums/index.php?showtopic=44275&st=40 News Thread]
[http://www.nero.com/nerodigital/eng/Nero_Digital_Audio.html Homepage] [http://www.hydrogenaudio.org/forums/index.php?showtopic=44283 Recommended Settings]
* Command Line
* Requires Windows and a SSE2 Processor (AMD support soon)

NeroAAC

2010-11-30T18:53:29Z

Greenpistachio: /* NeroAacTag */

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

<span style="color:red">'''This article is still a work in progress'''</span>

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) are not required and should normally not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. A scenario where using the switches might be useful is to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 file's meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

=== Usage ===

Windows:
<pre>neroAacTag.exe <file.mp4> <command> [<command> [<command> ...]]</pre>

==== Available commands ====
; <tt>-list-meta</tt>
: Lists existing metadata entries.
; <tt>-meta:<name>=<value></tt>
: Sets specified metadata field to specified value. Eg. -meta:artist="Pink Floyd"
; <tt>-meta-user:<name>=<value></tt>
: Sets specified metadata field to specified value. Allows non-standard metadata fields to be added.<br>'''WARNING''': fields added using -meta-user are not guaranteed to be read back on all Nero Digital compliant software/hardware.
; <tt>-list-standard-meta</tt>
: Displays a list of field names usable with -meta command.
; <tt>-list-standard-itunes-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-standard-memorystick-meta</tt>
: Displays a list of iTunes field names.
; <tt>-list-covers</tt>
: Lists cover art entries.
; <tt>-write-nd-covers</tt>
: Write cover art also to ND tags. Default is to write only to iTunes tags.
; <tt>-add-cover:<type>:<jpegfile></tt>
: Creates a cover art entry from specified JPEG file. <tt><type></tt> specifies type of cover art entry and can be "front" or "back". If specified cover art entry already exists, its contents are overwritten. Eg. <tt>-add-cover:back:hello.jpg</tt>
; <tt>-dump-cover:<type>:<jpegfile></tt>
: Dumps specified cover art entry contents to a JPEG file.
; <tt>-remove-cover:<type></tt>
: Removes specified cover art entry.
; <tt>-remove-cover:all</tt>
: Removes all cover art entries.
; <tt>-list-chapters</tt>
: Lists chapters present in the file.
; <tt>-chapter:<number></tt>
: Sets chapter index metadata edits apply to. Value of 0 (default state) applies edits to all present chapters. Also affects <tt>-list-meta</tt> output.
; <tt>-chapters-to-tracknumbers</tt>
: Generates track number metadata according to the chapter list.

NeroAAC

2010-11-30T18:30:17Z

Greenpistachio: /* Advanced features / troubleshooting */

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

<span style="color:red">'''This article is still a work in progress'''</span>

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) are not required and should normally not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. A scenario where using the switches might be useful is to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 files meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

NeroAAC

2010-11-30T18:27:32Z

Greenpistachio: /* Quality/bitrate control */

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.4.0 (Feb 18. 2010)
| preview_release = n/a
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

The three command-line tools are:
* neroAacEnc
* neroAacDec
* neroAacTag

<span style="color:red">'''This article is still a work in progress'''</span>

== NeroAacEnc ==

This is the encoder command-line tool. It is currently at version 1.5.4.0 and was last updated Feb 18th, 2010. It is used to encode a [[RIFF_WAVE|.WAV]] file containing PCM data into an [[MP4|.MP4]] file containing an AAC stream.

=== Usage ===

Windows
<pre>neroAacEnc.exe [options] -if <input-file> -of <output-file></pre>

Linux:
<pre>./neroAacEnc [options] -if <input-file> -of <output-file></pre>
<small>Note: Make sure the binary is executable</small>

Where:
; <tt><input-file></tt>
:Path to source file to encode.<br>The file must be in Microsoft WAV format and contain PCM data.<br>Specify - to encode from stdin.<br>Note that multiple input files can be specified, they will be encoded together into a single output file with chapter marks indicating source file divisions.
; <tt><output-file></tt>
: Path to output file to encode to, in MP4 format.

==== Options: ====
===== Quality/bitrate control =====
; <tt>-q <number></tt>
: Enables "target quality" mode. (VBR)<br><tt><number></tt> is a floating-point number in 0...1 range. I.e. 0.5 or 0.75, etc. with 1 being the highest quality and thus also having the largest output file size.
; <tt>-br <number></tt>
: Specifies "target bitrate" mode. (ABR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.
; <tt>-cbr <number></tt>
: Specifies "target bitrate (streaming)" mode. (CBR)<br><tt><number></tt> is target bitrate in bits per second ranging from 8000 to 400000.

When neither of above quality/bitrate options is used, the encoder defaults to equivalent of <tt>-q 0.5</tt>

The following VBR quality settings result in the following average bitrates:
{| cellpadding=3 cellspacing=0 border=1
! Quality
! Bitrate (kbit/s)
|-
| 0.05
| 16
|-
| 0.15
| 33
|-
| 0.25
| 66
|-
| 0.35
| 100
|-
| 0.45
| 146
|-
| 0.55
| 192
|-
| 0.65
| 238
|-
| 0.75
| 285
|-
| 0.85
| 332
|-
| 0.95
| 381
|}

===== Multipass encoding =====
; <tt>-2pass</tt>
: Enables two-pass encoding mode.<br>Note that two-pass mode requires a physical file as input, rather than stdin.
; <tt>-2passperiod <number></tt>
: Overrides two-pass encoding bitrate averaging period, in milliseconds.<br>Specify zero to use least restrictive value possible (default).

===== Advanced features / troubleshooting =====
; <tt>-lc</tt>
: Forces use of LC AAC profile (HE features disabled). (LC = Low Complexity)
; <tt>-he</tt>
: Forces use of HE AAC profile (HEv2 features disabled). (HE = High Efficiency)
; <tt>-hev2</tt>
: Forces use of HEv2 AAC profile

''Note that the above switches (-lc, -he, -hev2) should not be used''. The optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. It should be used only to force LC when you have a device that doesn’t support HE.

; <tt>-ignorelength</tt>
: Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.

== NeroAacDec ==

NeroAacDec is the command-line decoder. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. It decodes an [[MP4|.MP4]] file into a [[RIFF_WAVE|.WAV]] file

=== Usage ===

Windows:
<pre>neroAacDec.exe -if <input file> -of <output file> [-chapter <number>]</pre>

Where:
; <tt><input-file></tt>
: Path of source input file to decode, in MP4 format.
; <tt><output-file></tt>
: Path to decode the file to, in WAV format.<br>Specify - to decode to stdout.

==== Options ====

; <tt>-chapter <number></tt>
: Specify the chapter mark within the input MP4 file.

== NeroAacTag ==

NeroAacTag is used to list or edit an MP4 files meta-data. It is currently at version 1.5.1.0 and was last updated Dec 17th, 2009. By default is writes iTunes-compatible tags.

NeroAAC

2010-11-30T18:10:20Z

Greenpistachio: /* NeroAacDec */

NeroAAC

2010-11-30T17:59:33Z

Greenpistachio: /* Usage */

NeroAAC

2010-11-30T17:57:02Z

Greenpistachio: /* NeroAacEnc */

NeroAAC

2010-11-30T17:52:36Z

Greenpistachio:

NeroAAC

2010-11-30T17:48:29Z

Greenpistachio: /* NeroAacDec */

NeroAAC

2010-11-30T17:41:08Z

Greenpistachio: /* NeroAacDec */

NeroAAC

2010-11-30T17:36:50Z

Greenpistachio:

NeroAAC

2010-11-30T17:27:32Z

Greenpistachio: /* NeroAacEnc */

NeroAAC

2010-11-30T17:25:13Z

Greenpistachio: /* Options: */

NeroAAC

2010-11-30T17:20:45Z

Greenpistachio: /* Options: */

NeroAAC

2010-11-30T17:19:37Z

Greenpistachio: /* Usage */

NeroAAC

2010-11-30T17:03:33Z

Greenpistachio:

NeroAAC

2010-11-30T16:42:57Z

Greenpistachio:

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.1.0
| preview_release =
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is a set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and Linux. It is the same codec that is used in Nero's other, commercial products.

The three command-line tools are:
* NeroAacEnc
* NeroAacDec
* NeroAacTag

<span style="color:red">'''This article is still a work in progress'''</span>

NeroAAC

2010-11-30T16:24:41Z

Greenpistachio:

NeroAAC

2010-11-30T15:54:03Z

Greenpistachio:

[[category:Encoder/Decoder]]
{{Software Infobox
| name = Nero AAC Codec
| logo =
| screenshot =
| caption =
| maintainer = Nero AG
| stable_release = 1.5.1.0
| preview_release =
| operating_system = Windows, Linux
| use = Encoder/Decoder
| license = see site for license
| website = [http://www.nero.com/enu/technologies-aac-codec.html Nero AAC Codec]
}}

The Nero AAC codec has been made freely available by Nero AG for personal non-commercial and/or technology-evaluation purposes. It is set of three command-line tools that are used to encode, decode and apply tags to MP4 files. The download contains binaries for both Windows and x86 Linux.

The tools are:
* NeroAacEnc
* NeroAacDec
* NeroAacTag

NeroAAC

2010-11-30T15:34:03Z

Greenpistachio:

[[category:Encoder/Decoder]]

NeroAACEnc

NeroAACDec

NeroAAC

2010-11-30T15:32:56Z

Greenpistachio: Created page with "[category:Encoder/Decoder] NeroAACEnc NeroAACDec"

[category:Encoder/Decoder]

NeroAACEnc

NeroAACDec

XLD

2010-11-30T15:01:33Z

Greenpistachio:

{{Infobox Software
| name = XLD
| logo =
| screenshot = [[image:Screenshot2.jpg|250px]]
| caption = A secure ripper featuring AccurateRip for Mac OS/X
| maintainer = tmkk
| stable_release = 20090320
| preview_release = 20090320
| operating_system = Mac OS X
| use = Digital Audio Extraction
| license = GPL
| website = [http://tmkk.pv.land.to/xld/index_e.html XLD website]
}}

=Introduction=
X Lossless Decoder(XLD) is a tool for Mac OS X that is able to decode/convert/play various 'lossless' audio files. The supported audio files can be split into some tracks with cue sheet when decoding. It works on Mac OS X 10.3 and later.

XLD is Universal Binary, so it runs natively on both Intel Macs and PPC Macs.

==Features==
XLD supports the following formats:

* (Ogg) FLAC (.flac/.ogg)
* Monkey's Audio (.ape)
* Wavpack (.wv)
* TTA (.tta)
* Apple Lossless (.m4a) [10.4 and later]
* AIFF, WAV, etc
* CUE Sheet generation
* [[AccurateRip]] technology

<br>
Other formats supported by Libsndfile are also decodable. XLD does not use the decoder frontend but the library instead to decode, so no intermediate files are generated. All of the supported formats can be directly split with the cue sheet. XLD also supports so-called 'embedded' or 'internal' cue sheet.

Currently you can choose output format from WAVE,AIFF and Raw PCM. In addition, you can choose Ogg Vorbis (aoTuV), MPEG-4 AAC (QuickTime/CoreAudio), MP3 (LAME), Apple Lossless, FLAC, HE-AAC (aacPlus v1/v2), Wave64 and WavPackin the GUI version.

XLD version '''20080812''' and later can be used as a CD ripper. You can convert each track in your audio CD into the desired format. Also XLD supports output a CD image with cue sheet (wav+cue, flac+cue, etc).

==Correction mechanism==
XLD (X Lossless Decoder) uses the [[cdparanoia]] 10.2 libaries ripping and error correcting. XLD can also be used on drives that don't have Accurate Stream and utilize C2 error pointers (see [http://wiki.hydrogenaudio.org/index.php?title=Secure_ripping#XLD Secure ripping]). Additionally the [http://www.accuraterip.com/ AccurateRip] database is used for matching checksums between numerous CD rips.

==Known Bugs==
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=66076 Known bugs] for the latest release of the sofware are listed under "Version history" on the main page of the XLD website and can be posted under this HA thread.

=Development API=
The source code of XLD is included in the StuffIT light expander archive. The library and header of Libsndfile, FLAC, Wavpack, Monkey's audio and Libcddb is required to compile it. <br>

* <code>libparanoia </code>
* <code>libsndfile </code>
* <code>libflac</code>
* <code>libwavpack</code>
* <code>libape</code>
* <code>libcddb</code>

==Plug-ins==

The frontend and backend of XLD are seperated. The frontend is able to access the various decoders with the same interface. In the future various plug-in interfaces will be provided, so that you can easily develop plug-ins for new formats. If you are interested in doing this, please see <code>XLDDecoder.h</code> in the source files.

==Source code==
The source code is included in the archive below and is released under the GPL. Due to the rapid progression of developement on XLD it best you consult the source-code on the[http://tmkk.hp.infoseek.co.jp/xld/index_e.html developers] website for the latest builds, which may include new features and binaries that are not listed on this wiki page.

* [http://tmkk.hp.infoseek.co.jp/xld/xld-gui-20080914.tbz xld-gui-20080914.tbz] (GUI version)
* [http://tmkk.hp.infoseek.co.jp/xld/xld-20070917.tar.bz2 xld-20070917.tar.bz2] (Command-line version)
* [http://tmkk.hp.infoseek.co.jp/xld/XLDVorbisOutput.bundle.zip Vorbis aoTuV beta5] Plugin (For those who like the latest one; updated on 08/6/1)
* [http://tmkk.hp.infoseek.co.jp/xld/XLDVorbisOutput_b5.5.zip Vorbis aoTuV beta5.5] Plugin (For those who like the latest one; updated on 08/6/1)

==External links==
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=65873&st=0 XLD integrates CD Paranoia III 10.2] a thread containing the intergration of cdparanoia 10.2 into XLD.
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=66074 XLD master thread list] a master thread list that display's all facets of information releated to the XLD project
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=65894 MAC OEM features drive database] a thread for various HA user submitted drive database of OEM drive features for XLD.
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=66075 XLD drive use results with log] a thread for various HA user submitted ripping logs of XLD rips.
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=65914&st=0 XLD and the drive cache] a thread for drive caches of various HA user submitted XLD rips

[[Category:CD Rippers]]
[[Category:Media Players]]

XLD

2010-11-30T15:00:45Z

Greenpistachio:

{{Infobox Software
| name = XLD
| logo =
| screenshot = [[image:Screenshot2.jpg|250px]]
| caption = A secure ripper featuring AccurateRip for Mac OS/X
| maintainer = tmkk
| stable_release = 20090320
| preview_release = 20090320
| operating_system = Mac OS X
| use = Digital Audio Extraction
| license = GPL
| website = [http://tmkk.pv.land.to/xld/index_e.html]
}}

=Introduction=
X Lossless Decoder(XLD) is a tool for Mac OS X that is able to decode/convert/play various 'lossless' audio files. The supported audio files can be split into some tracks with cue sheet when decoding. It works on Mac OS X 10.3 and later.

XLD is Universal Binary, so it runs natively on both Intel Macs and PPC Macs.

==Features==
XLD supports the following formats:

* (Ogg) FLAC (.flac/.ogg)
* Monkey's Audio (.ape)
* Wavpack (.wv)
* TTA (.tta)
* Apple Lossless (.m4a) [10.4 and later]
* AIFF, WAV, etc
* CUE Sheet generation
* [[AccurateRip]] technology

<br>
Other formats supported by Libsndfile are also decodable. XLD does not use the decoder frontend but the library instead to decode, so no intermediate files are generated. All of the supported formats can be directly split with the cue sheet. XLD also supports so-called 'embedded' or 'internal' cue sheet.

Currently you can choose output format from WAVE,AIFF and Raw PCM. In addition, you can choose Ogg Vorbis (aoTuV), MPEG-4 AAC (QuickTime/CoreAudio), MP3 (LAME), Apple Lossless, FLAC, HE-AAC (aacPlus v1/v2), Wave64 and WavPackin the GUI version.

XLD version '''20080812''' and later can be used as a CD ripper. You can convert each track in your audio CD into the desired format. Also XLD supports output a CD image with cue sheet (wav+cue, flac+cue, etc).

==Correction mechanism==
XLD (X Lossless Decoder) uses the [[cdparanoia]] 10.2 libaries ripping and error correcting. XLD can also be used on drives that don't have Accurate Stream and utilize C2 error pointers (see [http://wiki.hydrogenaudio.org/index.php?title=Secure_ripping#XLD Secure ripping]). Additionally the [http://www.accuraterip.com/ AccurateRip] database is used for matching checksums between numerous CD rips.

==Known Bugs==
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=66076 Known bugs] for the latest release of the sofware are listed under "Version history" on the main page of the XLD website and can be posted under this HA thread.

=Development API=
The source code of XLD is included in the StuffIT light expander archive. The library and header of Libsndfile, FLAC, Wavpack, Monkey's audio and Libcddb is required to compile it. <br>

* <code>libparanoia </code>
* <code>libsndfile </code>
* <code>libflac</code>
* <code>libwavpack</code>
* <code>libape</code>
* <code>libcddb</code>

==Plug-ins==

The frontend and backend of XLD are seperated. The frontend is able to access the various decoders with the same interface. In the future various plug-in interfaces will be provided, so that you can easily develop plug-ins for new formats. If you are interested in doing this, please see <code>XLDDecoder.h</code> in the source files.

==Source code==
The source code is included in the archive below and is released under the GPL. Due to the rapid progression of developement on XLD it best you consult the source-code on the[http://tmkk.hp.infoseek.co.jp/xld/index_e.html developers] website for the latest builds, which may include new features and binaries that are not listed on this wiki page.

* [http://tmkk.hp.infoseek.co.jp/xld/xld-gui-20080914.tbz xld-gui-20080914.tbz] (GUI version)
* [http://tmkk.hp.infoseek.co.jp/xld/xld-20070917.tar.bz2 xld-20070917.tar.bz2] (Command-line version)
* [http://tmkk.hp.infoseek.co.jp/xld/XLDVorbisOutput.bundle.zip Vorbis aoTuV beta5] Plugin (For those who like the latest one; updated on 08/6/1)
* [http://tmkk.hp.infoseek.co.jp/xld/XLDVorbisOutput_b5.5.zip Vorbis aoTuV beta5.5] Plugin (For those who like the latest one; updated on 08/6/1)

==External links==
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=65873&st=0 XLD integrates CD Paranoia III 10.2] a thread containing the intergration of cdparanoia 10.2 into XLD.
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=66074 XLD master thread list] a master thread list that display's all facets of information releated to the XLD project
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=65894 MAC OEM features drive database] a thread for various HA user submitted drive database of OEM drive features for XLD.
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=66075 XLD drive use results with log] a thread for various HA user submitted ripping logs of XLD rips.
* [http://www.hydrogenaudio.org/forums/index.php?showtopic=65914&st=0 XLD and the drive cache] a thread for drive caches of various HA user submitted XLD rips

[[Category:CD Rippers]]
[[Category:Media Players]]