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CVIII. oggvorbis


The OGG/Vorbis file format, as defined by, is a scheme for compressing audio streams by multiple factors with a minimum of quality loss. This extension adds Ogg Vorbis support to PHP's URL Wrappers. When used in read mode, compressed OGG/Vorbis data is expanded to raw PCM audio in one of six PCM encoding formats listed below.


This extension requires PHP >= 4.3.0, libogg >= 1.0, and libvorbis >= 1.0.

Konfiguracja uruchomieniowa

To rozszerzenie nie definiuje posiada żadnych dyrektyw konfiguracyjnych w pliku php.ini.


oggvorbis is installed through the usual PECL package installation process.

  • $ pear install oggvorbis

  • Copy the resulting to an appropriate location and add to your php.ini file or load it dynamically in your PHP script using dl('');

Context options

Tabela 1. OGG/Vorbis tuning options

pcm_modePCM byte encoding used. See constants below.Read / WriteOGGVORBIS_PCM_S16_LE
ratePCM Sampling rate. Measured in Hz.Write only44100
bitrate Vorbis Average Bitrate Encoding / Variable Bitrate Encoding. Measured in bps (ABR) or Quality level (VBR: 0.0 to 1.0). 128000 ABR is rough equal to 0.4 VBR. Write only128000
channelsNumber of PCM channels. 1 == Mono, 2 == Stereo.Write only2
serialno Serial Number of stream within file. Must be unique within file. Because of the potential to select a duplicate serial number within a chained file, make efforts to manually assign unique numbers when encoding. Write onlyRandom
comments Associative array of file comments. Will be translated to strtoupper($name) . "=$value". Note: This context option is not available in oggvorbis-0.1 Write onlyarray('ENCODER' => 'PHP/OggVorbis,')

Stałe predefiniowane

Poniższe stałe są zdefiniowane w tym rozszerzeniu i stają się dostępne, gdy rozszerzenie jest dokompilowane do PHP, lub załadowane dynamicznie przy starcie.

Tabela 2. OGG/Vorbis supports PCM encodings in the following formats

OGGVORBIS_PCM_U8Unsigned 8-bit PCM.
OGGVORBIS_PCM_U16_LEUnsigned 16-bit PCM. Little Endian byte order.
OGGVORBIS_PCM_U16_BEUnsigned 16-bit PCM. Big Endian byte order.
OGGVORBIS_PCM_S16_LESigned 16-bit PCM. Little Endian byte order.
OGGVORBIS_PCM_S16_BESigned 16-bit PCM. Big Endian byte order.
Spis treści
Usage --  Examples on using the ogg:// wrapper.