iOS 7 m4a到mp3编码 - 有可能吗？ [英] iOS 7 m4a to mp3 encoding - is it possible?

问题描述

我搜索了所有的互联网，并没有在我的问题上找到明确的答案 - 如何录制 m4a 文件（因为此答案指出 iOS不支持mp3录制）后来将其转换为 mp3 ？

I've searched through all the internet and didn't find a clear answer on my question - How do you record an m4a file (because as this answer states iOS doesn't support mp3 recording) and later convert it to mp3?

录制音频文件似乎是小菜一碟，但噩梦开始了。

Recording an audio file seemed to be a piece of cake, but then the nightmare began.

它是2013年左右，我还没有在网上找到任何关于此程序的明确例子。由于某些GPL许可，有人说你做不到。 其他人建议使用Apple的例子，它们从来没有提到过mp3！关于SO的回溯，还有一个着名的问题。 2009其中一个答案是 -

It's 2013 around and I haven't found any clear example of this procedure on the web. Some people say you can't do it because of some GPL license. Others suggest to use Apple's examples which never ever mentions mp3 at all! There's also a famous question on SO dating back to 2009 one of the answers to which says -

iOS上没有区别：App Store应用程序不允许加载dylib。

No difference on iOS: App Store apps aren't allowed to load dylibs.

在iOS上获取实际LAME库时也遇到问题 - 这个问题的评论读到人们在iOS 6及更高版本上编译时遇到问题。

There's also trouble getting hold of the actual LAME library on iOS - this question's comments read that people have trouble compiling it on iOS 6 and above.

随着iOS 7的公开，我想再次提出这个问题 - 是否有任何示例项目我可以找到实际上会在iOS设备上处理mp3转换吗？

With iOS 7 out in the open I would like to raise the question again - is there any example of a sample project I can find that actually does deal with mp3 conversion on an iOS device?

请注意，这个问题与上述问题不重复，只是为了澄清问题。最后一切都是最后一个问题 -

Note that this question is not a duplicate of the aforementioned questions and is just an effort to clarify things out. Finally it all comes to the one and final question -

iOS m4a到mp3的转换是否可能？

推荐答案

据我所知，我们最接近的就是转换线性PCM 输入从麦克风重新排序到 MP3 。在转换为 .caf 文件的巨大尺寸时，它有很多缺点。您可以在这里查看项目。

As far as I could research it - the closest we can get to it is to convert Linear PCM input reordered from the microphone to MP3. It has lots of downsides as of the time of the conversion to the huge size of the .caf file. You can check out the project here.

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