PDO_ODBC DSN Usage Functie naslag PHP Manual oggvorbis Introductie The OGG/Vorbis file format, as defined by » https://www.vorbis.com/ , is a scheme for compressing audio streams multiple fact...

Introductie

The OGG/Vorbis file format, as defined by » https://www.vorbis.com/, 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.

Afhankelijkheden

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

Configuratie tijdens scriptuitvoer

Deze extensie gebruikt geen configuratie regels.

Installatie

Information for installing this PECL extension may be found in the manual chapter titled Installation of PECL extensions. Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: » https://pecl.php.net/package/oggvorbis

Context options

**OGG/Vorbis tuning options**
Option	Definition	Relevance	Default
pcm_mode	PCM byte encoding used. See constants below.	Read / Write	`OGGVORBIS_PCM_S16_LE`
rate	PCM Sampling rate. Measured in Hz.	Write only	`44100`
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 only	`128000`
channels	Number of PCM channels. 1 == Mono, 2 == Stereo.	Write only	`2`
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 only	Random
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 only	`array('ENCODER' => 'PHP/OggVorbis, https://pear.php.net/oggvorbis')`

Voorgedefinieerde constanten

Deze constanten worden gedefinieerd door deze extensie, en zullen alleen beschikbaar zijn als de extensie met PHP is meegecompileerd, of als deze dynamisch is geladen vanuit een script.

**OGG/Vorbis supports PCM encodings in the following formats**
Constant	Definition
`OGGVORBIS_PCM_U8`	Unsigned 8-bit PCM.
`OGGVORBIS_PCM_S8`	Signed 8-bit PCM.
`OGGVORBIS_PCM_U16_LE`	Unsigned 16-bit PCM. Little Endian byte order.
`OGGVORBIS_PCM_U16_BE`	Unsigned 16-bit PCM. Big Endian byte order.
`OGGVORBIS_PCM_S16_LE`	Signed 16-bit PCM. Little Endian byte order.
`OGGVORBIS_PCM_S16_BE`	Signed 16-bit PCM. Big Endian byte order.

oggvorbis