[linux-audio-announce] liboggz 0.9.3 Release

Conrad Parker conrad at metadecks.org
Fri Oct 7 02:59:32 EDT 2005

Oggz 0.9.3 Release

Oggz comprises liboggz and the command-line tools oggzinfo, oggzdump,
oggzdiff, oggzmerge, oggzrip, oggz-scan and oggz-validate.

liboggz is a C library providing a simple programming interface for reading
and writing Ogg files and streams. Ogg is an interleaving data container
developed by Monty at Xiph.Org, originally to support the Ogg Vorbis audio

This release is available as a source tarball at:


New in this release:

        * New oggz-scan tool (silvia)

        oggz-scan displays timestamps of characteristic features in an Ogg
        file. 'oggz-scan --keyframes file.ogg' displays timestamps of
        unforced Theora keyframes, which are a useful rough approximation of
        shot boundaries. Results can be output as plain text, CMML or HTML.

        * Improvements to oggz-validate:
          - added page-level validation, ensuring that a page that ends zero
          packets has the correct granulepos, -1. (MikeS)
          - added a check that any Theora bos pages come before Vorbis and
          Speex bos pages. (ticket:156) (conrad)
          - correct handling of chained files (ticket: 162) (conrad)

        * win32 build fix for oggz tools (j^)

        * Other bugfixes / closed tickets:

        liboggz: replace internal typedef of oggz_off_t, use off_t instead
          of long (ticket:161) (Grayfox)
        examples/fix-eos: discard trailing incomplete packets from the end
          of the stream. (MikeS)
        remove autogenerated manpages (ticket:155) (conrad, silvia)

About Oggz

Oggz comprises liboggz and the command-line tools oggzinfo, oggzdump,
oggzdiff, oggzmerge, oggzrip, oggz-scan and oggz-validate.

liboggz supports the flexibility afforded by the Ogg file format while
presenting the following API niceties:

        * Full API documentation

        * Comprehensive test suite of read, write and seeking behavior.
        The entire test suite can be run under valgrind if available.

        * Developed and tested on GNU/Linux, Darwin/MacOSX, Win32 and
        Symbian OS. May work on other Unix-like systems via GNU autoconf.
        For Win32: nmake Makefiles, Visual Studio .NET 2003 solution files
        and Visual C++ 6.0 workspace files are provided in the source

        * Strict adherence to the formatting requirements of Ogg bitstreams,
        to ensure that only valid bitstreams are generated; writes can fail
        if you try to write illegally structured packets.

        * A simple, callback based open/read/close or open/write/close
        interface to raw Ogg files.

        * Writing automatically interleaves with packet queuing, and provides	
        callback based notification when this queue is empty

        * A customisable seeking abstraction for seeking on multitrack Ogg
        data. Seeking works easily and reliably on multitrack and multi-codec
        streams, and can transparently parse Theora, Speex, Vorbis, FLAC,
        CMML and Ogg Skeleton headers  without requiring linking to those
        libraries. This allows efficient use on servers and other devices
        that need to parse and seek within Ogg files, but do not need to do
        a full media decode.

Full documentation of the liboggz API, customization and installation,
and mux and demux examples can be read online at:



The Oggz source tarball also contains the following command-line tools,
which are useful for debugging and testing Ogg bitstreams:

        * oggzinfo: Display information about one or more Ogg files and
        their bitstreams.

        * oggzdump: Hexdump packets of an Ogg file, or revert an Ogg file
        from such a hexdump.

        * oggzdiff: Hexdump the packets of two Ogg files and output

        * oggzmerge: Merge Ogg files together, interleaving pages in order
        of presentation time.

        * oggzrip: Extract one or more logical bitstreams from an Ogg file.

        * oggz-scan: Scan an Ogg file and output characteristic landmarks.

        * oggz-validate: Validate the Ogg framing of one or more files.


Oggz is Free Software, available under a BSD style license.

More information is available online at the Oggz homepage:


enjoy :)

Conrad Parker
Senior Software Engineer, Continuous Media Web, CSIRO Australia
http://www.annodex.net/   http://www.ict.csiro.au/cmweb/

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