在iPhone上将.caf转换为.mp3 [英] Convert .caf to .mp3 on iPhone

问题描述

我意识到这个问题已经被问过，但我没有看到一个答案，为我的需要。基本上我有.caf格式的全长歌曲，但我需要能够从服务器上传/下载。是否可以在iPhone上进行压缩（像.mp3或.wav），然后将它们发送到服务器？

I realize this question has been asked before, but I haven't seen an answer that works for my needs. Basically I have full length songs in .caf format but I need to be able to upload/download them from a server. Is it viable to do compression (to something like .mp3 or .wav) on the iPhone and then send them to the server? How would I go about doing this?

推荐答案

请参阅 AudioConverterServices ..这个魔术的功能是 AudioConverterNew 。 。但是请注意，您只能从可变比特率（VBR）文件转换为PCM（无损格式），从PCM转换为VBR ..因此在您的情况下，您必须从转换文件。 到到，然后从 PCM 到 .mp3 或任何你想要的格式。

Refer to AudioConverterServices.. the function that does the magic trick is AudioConverterNew.. however note that you can only convert from a variable bit rate (VBR) file to PCM (lossless format), and from PCM to VBR.. so in your case you will have to convert the file from .caf to PCM, then from PCM to .mp3 or whatever format you want.

有一个全面的例子，说明进行音频转换所需的所有步骤..下载免费样本代码 for the预订学习核心音频。您需要第6章音频转换的示例代码。 （任何认真对待核心音频的人都应该买那本书）。

For a comprehensive example that illustrates all the steps necessary in doing an audio conversion.. download the free sample code for the book Learning Core Audio. You want chapter 6 sample code for audio conversion. (anyone who is serious about core audio should buy that book).

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