|Ratings|| ||Unique User Downloads|| ||Download Rankings|
| 30%||Total: 4,809 This week: 1||All time: 569 This week: 380|
This class can be used the convert audio files in many formats to MP3 or WAV format streams.
It uses external programs to read audio files in many formats and output audio streams in the MP3 or WAV formats.
The converted streams can be saved to other files or served as the current script output.
Currently it supports converting files in the formats: MP3, WAV, OGG, FLAC, MPC, APE, WV, OFR, LA, PAC, SHN, AAC, AC3, AIF, 3GP, MOV, RAW and WMA.
The stream output bit rate and mono/stereo mode parameters are configurable.
|PHP does not have built-in extensions to manipulate audio. This apparent limitation can be compensated by using external audio manipulation programs that PHP can execute.
Sometimes it is necessary to manipulate large audio files. If PHP retrieves the resulting audio files into memory before serving them to the users, that may exceed the configured PHP memory limits.
That also would impose a delay caused by the time that programs take to finish the audio processing operations.
Another alternative is to generate temporary files to store the result of the requested audio manipulation operations. This would solve the memory problem, but it could take too much disk space and would not solve the delay problem.
This class implements an alternative that takes advantage of pipes between programs that are available under Unix, Linux and other systems, to execute external audio manipulation programs.
This way, the resulting audio files can be streamed directly to the user browser without any delays, and without taking too much server memory or any disk space.
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