iPhone - How to convert aiff audio files into aac?

Question

我正在开发一个录制音频的iPhone应用程序，现在它会录制aiff文件，我需要将这些文件转换为aac ...任何想法如何做到这一点？

Answer 1

Apple为处理转换的ExtAudioFile API提供了iOS示例代码： iPhoneExtAudioFileConvertTest

Answer 2

There's also a open-source library for aac conversion based on Apple's sample code that's a bit easier to use (using Objective-C):

https://github.com/michaeltyson/TPAACAudioConverter

Here's a blog entry by the author describing the project, along with questions and answers:

http://atastypixel.com/blog/easy-aac-compressed-audio-conversion-on-ios/