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se_tpb_dtbAudioEncoder



Transformer documentation: se_tpb_dtbAudioEncoder



Transformer Purpose
Input Requirements
Output
	
		On success
		On error
		
	
Configuration/Customization
	
		Parameters (tdf)
	
	
Further development
Dependencies
Author
Licensing



Transformer Purpose
The purpose of this transformer is to encode WAVE files (*.wav) into MP3 file (*.mp3)
in a DAISY/NISO 2005 or Daisy 2.02 DTB.

Input Requirements
A DAISY/NISO 2005 or Daisy 2.02 fileset.

Output

On success
A DAISY/NISO 2005 or Daisy 2.02 fileset, with all WAVE files converted into MP3.

On error
On error, this transformer will throw an exception and abort execution.


Configuration/Customization

	Parameters (tdf)
	
		manifest
		Path to a Daisy 2.02 (ncc.html) or DAISY/NISO 2005 (.opf) manifest file.
		outDir
		The output directory.
		bitrate
		The bitrate of the encoded files. (default 32 kbit/s)
		stereo
		The stereo mode of the encoded files. (default mono)
		freq
		The sample rate of the encoded files. (default 22050 Hz)
		filesetType
		Specifies the type of the input fileset. (default Daisy 2.02)		
	
	
Further development
This transformer could be extended to support multiple input and output audio formats.
The possibility to select a target fileset size instead of bitrate and frequency configuration
is another possible further development.

Dependencies
This transformer uses LAME for MP3 encoding. Refer to the LAME installation instructions
for information on how to install and configure LAME.

Author

Linus Ericson, TPB

Licensing

LGPL