File Converters. How do they work? [closed]

问题

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Closed 7 years ago.

how do file converters work? IE: Making a web application that will convert mp3 to ogg nearly instantly. This has always interested me.

回答1:

The server has a program installed that does the conversion. The file is accepted, run (possibly with exec('mp3-to-ogg tmpfile.mp3'); or similar), and passed back to be downloaded. It's quite simple, really, just as long as you have the program installed somewhere on the server where it can be run.

来源：https://stackoverflow.com/questions/9145341/file-converters-how-do-they-work