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.aiff

[英]Convert .m4r/.mp3 to .caf/.aiff in iphone app

原文 2009-10-29 00:33:30 9 3 iphone

As of right now I am using ffmpeg to convert from .mp3 --> to .aiff but I would like a native way to do this in xcode but i do not understand how to use AudioConverter.h in AudioToolbox soo if someone could please help me I would be really appreciative. 截至目前，我正在使用ffmpeg从.mp3->转换为.aiff，但我想以一种本机方式在xcode中执行此操作，但我不明白如何在AudioToolbox中使用AudioConverter.h，所以如果有人可以请帮助我，我将非常感激。

Thank You Enea 谢谢你Enea

3 个解决方案

ExtAudioFile can do a fantastic job of this. ExtAudioFile可以做得很好。 One reason to take some compressed formats like MP3 and convert to PCM is that there is much less of a latency when playing the sound. 采用某些压缩格式（例如MP3）并转换为PCM的原因之一是，播放声音时的等待时间要短得多。 An MP3 sound effect, for example, can take close to a second to start playing back, when the same sound in PCM could start almost immediately. 例如，当PCM中的相同声音几乎立即开始播放时，MP3声音效果可能需要一秒钟才能开始播放。 I know since I am converting my sounds to PCM at launch time and eliminating the delays I was plagued with. 我知道，因为我在启动时将声音转换为PCM，并消除了困扰我的延迟。

Go download iPhoneExtAudioFileConvertTest and you will find everything you need to do your own conversions 转到下载iPhoneExtAudioFileConvertTest ，您将找到进行自己的转换所需的一切

I think the real question is why would you want to? 我认为真正的问题是您为什么要这么做？ The iphone and AudioQueue has full mp3 support for playback and mixing. iphone和AudioQueue具有完整的mp3支持，可以播放和混音。 I know of no way to do this on the fly in the iPhone. 我不知道如何在iPhone中即时执行此操作。 It is a fairly processor intensive task and I doubt you could do it efficiently on the iPhone anyway. 这是一项相当耗费处理器的任务，我怀疑您是否仍然可以在iPhone上高效地完成任务。