README 6.81 KB
Newer Older
conrad's avatar
conrad committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Documentation files for Oggz
----------------------------

    PATCHES: Instructions for generating patches
    README: this file
    README.symbian: Instructions for building for Symbian
    README.win32: Instructions for building on Win32

Run:
----

    $ oggz help

for documentation of the various oggz commands.

conrad's avatar
conrad committed
16
About Oggz
conrad's avatar
conrad committed
17
==========
18

conrad's avatar
conrad committed
19 20 21 22 23 24 25 26 27 28 29
Oggz comprises liboggz and the tool oggz, which provides commands to
inspect, edit and validate Ogg files. The oggz-chop tool can also be
used to serve time ranges of Ogg media over HTTP by any web server that
supports CGI.

liboggz is a C library for reading and writing Ogg files and streams.
It offers various improvements over the reference libogg, including
support for seeking, validation and timestamp interpretation. Ogg is
an interleaving data container developed by Monty at Xiph.Org,
originally to support the Ogg Vorbis audio format but now used for
many free codecs including Dirac, FLAC, Speex and Theora.
conrad's avatar
conrad committed
30 31 32 33 34 35 36 37

Dependencies
------------

Oggz depends only on libogg, available in most free software
distributions, or in source form at: http://xiph.org/downloads/

Support is built-in for parsing the headers of and seeking to time
conrad's avatar
conrad committed
38
positions in Ogg Dirac, FLAC, Speex, Theora and Vorbis. Oggz is also
conrad's avatar
conrad committed
39 40 41 42 43 44
compatible with Annodex streams, and supports seeking on all tracks
described in an Ogg Skeleton track.

Installation
------------

45
Release archives can be installed using the conventional commands:
conrad's avatar
conrad committed
46 47 48 49 50

    $ ./configure
    $ make check
    $ sudo make install

51 52 53
sequence. Configuration details are in the file INSTALL. If you obtained
this source by svn, first run "./autogen.sh" to create the configure script,
then run the above commands.
conrad's avatar
conrad committed
54 55 56 57 58 59

Read the file README.win32 for installing under MS Windows, and
README.symbian for information about building for Symbian devices.

Source layout
-------------
60

conrad's avatar
conrad committed
61 62 63
    doc/
    doc/liboggz        autocreated by the doxygen tool from comments
                       contained in the public C header files
64

conrad's avatar
conrad committed
65
    include/           public C header files
conrad's avatar
conrad committed
66

conrad's avatar
conrad committed
67 68 69 70 71
    src/
    src/liboggz/       library source code.
    src/tools/         command line tools
    src/examples/      example programs using liboggz
    src/tests/         unit and functional tests
conrad's avatar
conrad committed
72

conrad's avatar
conrad committed
73 74 75
    symbian/           files necessary to compile the library for Symbian
    win32/             files necessary to compile the library and tools for
                       Microsoft Windows
conrad's avatar
conrad committed
76 77 78 79 80 81 82 83 84 85 86 87 88 89

Programming with liboggz
------------------------

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.
conrad's avatar
conrad committed
90 91
    For Win32: nmake Makefiles, Visual Studio .NET 2003, 2005 and 2008
    solution files are provided in the source distribution.
conrad's avatar
conrad committed
92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113

    * 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,
    PCM, 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:

conrad's avatar
conrad committed
114
    http://www.xiph.org/oggz/doc/
conrad's avatar
conrad committed
115

conrad's avatar
conrad committed
116 117 118 119 120 121
oggz tool
---------

Usage: oggz <subcommand> [options] filename ...

oggz is a commandline tool for manipulating Ogg files. It supports
122 123
multiplexed files conformant with RFC3533. Oggz can parse headers for CELT,
CMML, Dirac, FLAC, Kate, PCM, Speex, Theora and Vorbis, and can read and write
conrad's avatar
conrad committed
124 125 126 127 128 129
Ogg Skeleton logical bitstreams.

Commands:
  help          Display help for a specific subcommand (eg. "oggz help chop")

Reporting:
130
  codecs        Display the codecs present in an Ogg file
conrad's avatar
conrad committed
131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
  diff          Hexdump the packets of two Ogg files and output differences.
  dump          Hexdump packets of an Ogg file, or revert an Ogg file from
                such a hexdump.
  info          Display information about one or more Ogg files and their
                bitstreams.
  scan          Scan an Ogg file and output characteristic landmarks.
  validate      Validate the Ogg framing of one or more files.

Extraction:
  rip           Extract one or more logical bitstreams from an Ogg file.

Editing:
  chop          Extract the part of an Ogg file between given start and/or
                end times.
  comment       List or edit comments in an Ogg file.
  merge         Merge Ogg files together, interleaving pages in order of
                presentation time.
  sort          Sort the pages of an Ogg file in order of presentation time.

Miscellaneous:
  known-codecs  List codecs known by this version of oggz
conrad's avatar
conrad committed
152

153 154 155 156
The script bash-completion/oggz enables completion of tool options and codec
names when using the bash shell. Source it from your .profile, or install it
in /etc/bash_completion.d to enable it system-wide.

157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178

oggz-chop: General usage and CGI installation
---------------------------------------------

oggz-chop extracts the part of an Ogg file between given start and/or end
times. The output file contains copies of the headers of the input file, and
all the codec data required to correctly decode the content between the start
and end times specified on the commandline. For codecs with data dependencies
like video keyframes, the keyframe prior to the starting time will be included
in the output.

An Apache server can be configured to use oggz-chop to handle all Ogg files
(or, all Ogg files in a particular directory). An example Apache configuration
is in the liboggz source tree, along with a script for installing it on a
Debian server.

The oggz-chop binary checks if it is being run as a CGI script (by checking
some environment variables), and if so acts based on the CGI query parameter
t=, much like mod_annodex. It accepts all the time specifications that
mod_annodex accepts (npt and various smpte framerates), and start and end
times separated by a /.

conrad's avatar
conrad committed
179 180 181 182 183 184 185
License
-------

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

More information is available online at the Oggz homepage:

conrad's avatar
conrad committed
186
    http://xiph.org/oggz/
187

conrad's avatar
conrad committed
188
enjoy :)
189

conrad's avatar
conrad committed
190 191
--
Conrad Parker
conrad's avatar
conrad committed
192
http://www.annodex.net/