将两个CAF文件连接在一起 [英] Joining two CAF files together
问题描述
我这里有一个简单的问题。我有两个CAF文件。我想要做的就是将它们加入一个长音频文件。
I have the simple problem here. I have two CAF files. All I want to do is to join them to be one long audio file.
我试过：
-
使用NSData类并将两个文件的音频数据合并为一个。没工作。我假设某些文件属性未正确设置。生成的文件只播放第一个文件的长度。
Use the NSData class and append the audio data of both files into one. Hasn't worked. I assume some file property is not being set properly. The resulting file only plays the length of the first file.
尝试在我的加入过程中设置生成的文件的kAudioFilePropertyAudioDataByteCount属性。没有结果。
Tried to set the kAudioFilePropertyAudioDataByteCount property of the resulting file in my joining process. No result.
有人能指出我正确的方向/帮我一些示例代码吗？我见过其他人提出类似的问题并且没有得到答复。希望有人会选择这个。
Could anyone point me in the right direction / help me with some sample code? I have seen other people asking similar questions and going unanswered. Hoping someone would pick this up.
非常感谢您的帮助。谢谢。
Your help is greatly appreciated. Thanks.
推荐答案
如果有人热衷于知道答案，有办法解决。您必须使用AudioFiles API调用。基本上，你需要：
If anyone is keen to know the answer, there is a way to do it. You have to use the AudioFiles API calls. Basically, you'd:
- 使用带有正确参数的AudioFileCreate创建一个新的音频文件（比特率等）。
- 打开你的第一个文件，读取数据包并将它们写入新创建的文件。
- 打开你的第二个文件并执行相同操作。写完第一个文件后，确保你的计数器没有被清零。
- AudioFileClose - 你已经完成了！
- create a new audio file using AudioFileCreate with the correct parameters (bitrate etc).
- open your first file, read the packets and write them to the newly created file.
- open your second file and do the same. make sure your counters are not zero-ed out after writing the first file.
- AudioFileClose -- and you're done!
需要注意的事项：
本地文件，你必须运行一个方法来逃避空间
Things to note: for local files, you have to run a method to escape spaces
这就是它！
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