CODEWITHSUNDEEP
php
Bonjour
Bonjour

Reputation: 75

Audio file to waveform using PHP

I'm looking for PHP class which will take an audio file and them return an image file of the waveform - similar effect can be seen here http://soundcloud.com/rollin-fire-cru/sets/house-house-house-house/

It should run on a linux server and accept the following audio file formats: mp3, mp4, aac, wav

I found an example class, but it does a very basic job http://phpclasses.ca/package/482-PHP-Extracts-attributes-of-audio-files-Visualization.html

Any help will be highly appreciated!

Upvotes: 4

Views: 989

Answers (1)

Karoly Horvath
Karoly Horvath

Reputation: 96258

All sane sites does this as a background job, preferably in a faster language (e.g.: C++).

You have to decode all the formats to raw audio (wav), then create an image from that. Preferably on the fly meaning as soon as you decode a chunk of audio you draw the image for that chunk. Most codecs compress the data to 5-20% of the original size, so if you have a 10M file you suddenly have 50-200M of raw data... and if you have a 100M DJ mix.. well.. you get the point.

After the background process finished, you can simply serve the generated image with your favorite web-server.

Although it's possible to do all of this in PHP I wouldn't recommend it.

Upvotes: 2

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