ogg://

    ogg:// — Audio streams

    Description

    Files opened for reading via the ogg:// wrapper are treated as compressed audio encoded using the OGG/Vorbis codec. Similarly, files opened for writing or appending via the ogg:// wrapper are written as compressed audio data. stream_get_meta_data(), when used on an OGG/Vorbis file opened for reading will return various details about the stream including the vendor tag, any included comments, the number of channels, the sampling rate, and the encoding rate range described by: bitrate_lower, bitrate_upper, bitrate_nominal, and bitrate_window.

    ogg:// (PECL)

    Note: This wrapper is not enabled by default
    In order to use the ogg:// wrapper, the » OGG/Vorbis extension available from » PECL must be installed.

    Usage

    • ogg://soundfile.ogg
    • ogg:///path/to/soundfile.ogg
    • ogg://http://www.example.com/path/to/soundstream.ogg

    Options

    Wrapper Summary
    Attribute Supported
    Restricted by allow_url_fopen No
    Allows Reading Yes
    Allows Writing Yes
    Allows Appending Yes
    Allows Simultaneous Reading and Writing No
    Supports stat() No
    Supports unlink() No
    Supports rename() No
    Supports mkdir() No
    Supports rmdir() No

    Context options
    Name Usage Default Mode
    pcm_mode PCM encoding to apply while reading, one of: OGGVORBIS_PCM_U8, OGGVORBIS_PCM_S8, OGGVORBIS_PCM_U16_BE, OGGVORBIS_PCM_S16_BE, OGGVORBIS_PCM_U16_LE, and OGGVORBIS_PCM_S16_LE. (8 vs 16 bit, signed or unsigned, big or little endian) OGGVORBIS_PCM_S16_LE Read
    rate Sampling rate of input data, expressed in Hz 44100 Write/Append
    bitrate When given as an integer, the fixed bitrate at which to encode. (16000 to 131072) When given as a float, the variable bitrate quality to use. (-1.0 to 1.0) 128000 Write/Append
    channels The number of audio channels to encode, typically 1 (Mono), or 2 (Stereo). May range as high as 16. 2 Write/Append
    comments An array of string values to encode into the track header.   Write/Append

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