Ogg and Vorbis Tools for Java ----------------------------- This library is a pure Java, Apache v2 licensed project for working with Ogg and Vorbis files Currently, support for the Ogg container is fairly complete, offering the ability to read, write, add and change streams within an Ogg file. It should be possible to use the Ogg parts as a basis for dealing with any multimedia data stored in an Ogg container. Support for the Vorbis audio format so far concentrates on metadata. It is possible to retrieve and change metadata (such as sampling rates, user comments etc), and tools are provided to query and alter these (see the Tools section below). At this time, there is no support for decoding or encoding audio data. Contributions for these areas would be welcomed! Very limited support is also included for FLAC comments (user metadata), which use the same scheme as Vorbis. Tools ----- As part of the project, a small number of pure Java tools are provided to help when working with Ogg and Vorbis files. Two jar files are available. **vorbis-java-tools.jar** should be used when embedding the code, while **vorbis-java-tools-jar-with-dependencies.jar** is what should be used for standlone cases, as all dependencies are included. org.gagravarr.ogg.tools.OggInfoTool Prints basic information on the streams in a file org.gagravarr.vorbis.tools.VorbisInfoTool Prints detailed information on the contents of a Vorbis file, including versions, comments, bitrates, channels and audio rates, codebooks and file length org.gagravarr.vorbis.tools.VorbisCommentTool Allows the listing and editing of comments (user metadata) of a Vorbis file. Works similar to *vorbiscomment* commandline tool that ships with libvorbis Apache Tika ----------- Included in the tika module are Parser and Detector plugins for Apache Tika for Ogg based file formats (current Ogg, Vorbis and FLAC). These include appropriate service registry entries for Tika to allow these plugins to be automatically loaded by Tika. Simply ensure that the tika module, and the core module are present on the Tika classpath and they will be used. Getting Started --------------- There are four main classes that you can start with, depending on the kind of file you have, and your interests. These are: org.gagravarr.ogg.OggFile Provides read and write support for Ogg files of all types, working at the packet / stream level org.gagravarr.vorbis.VorbisFile Provides read and write support for Ogg Vorbis audio files. Provides access to the key parts of the Vorbis file, such as info and comments. (No support yet for encoding or decoding the audio packets though) org.gagravarr.flac.FlacOggFile Provides read support for FLAC files stored in an Ogg container. Allows access to the key parts of the file, such as Info, Tags and compressed audio. (No encoding or decoding of audio packets though) org.gagravarr.flac.FlacFile Provides read support for regular FLAC files. Provides access to the key parts of the file, such as Info, Tags and compressed audio. (No encoding or decoding of audio packets though) The best way to see how to use the code is to look at the Tools Package, which has examples of reading and writing tags, and the Tika Package, which has examples of reading audio metadata. In addition, the unit tests can provide examples of uses too. Information Resources --------------------- * Ogg file format - RFC3533, plus http://xiph.org/vorbis/doc/oggstream.html and http://xiph.org/vorbis/doc/framing.html * Vorbis - http://xiph.org/vorbis/doc/ * FLAC - http://flac.sourceforge.net/format.html * FLAC in Ogg - http://flac.sourceforge.net/ogg_mapping.html * Tika - http://tika.apache.org/