PHP Manual
Audio Streams
Audio Streams
ogg:// PHP 4.3.0 and up (PECL)
- ogg://soundfile.ogg
- ogg:///path/to/soundfile.ogg
- ogg://http://www.example.com/path/to/soundstream.ogg
Note:
This wrapper is not enabled by default
In order to use the ogg:// wrapper you must install
the » OGG/Vorbis extension
available from » PECL.
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 writen 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
.
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 (Stero).
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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