如何为Base64 WAV转换为JavaScript中的base64 MP3 [英] How to convert base64 wav to base64 mp3 in JavaScript

问题描述

我有麻烦我的应用程序。

我要录制声音并将其存储在使用iOS的科尔多瓦。我已经有一个base64 / wav文件，但它是非常沉重的，所以我想将其转换成一个base64 / MP3。

这是一个可以让我做到这一点的算法？

例如：

  b64Wavtob64mp3（BASE64 / ...）;
//返回一个MP3的base64
 

在此先感谢！

解决方案

我忘了完全的base64 ，因为我一直在寻找一个音频COM pressed 的

解决了！

我用 wav2m4a 插件做到了。

  

https://github.com/xu-li/phonegap-wav2m4a

不过，我想走得更远，所以我修改 CDVSound.m 在iOS版。
我只是按照这些说明：

  

https://gist.github.com/jlsuarezs/d48094d431307a466496

1. 添加到 startRecordingAudio 方法上的 CDVSound.m 这样的：

   *的NSDictionary = recordSettings [NSDictionary的dictionaryWithObjectsAndKeys：
                                       [NSNumber的numberWithInt：kAudioFormatMPEG4AAC]，AVFormatIDKey，
                                       [NSNumber的numberWithFloat：16000.0]，AVSampleRateKey，
                                       [的NSNumber numberWithInt：1]，AVNumberOfChannelsKey，
                                       零];




2. 替换为：

   audioFile.recorder = [[CDVAudioRecorder页头] initWithURL：audioFile.resourceURL设置：零误差：放大器;错误] //默认PCM录音

   使用：

   audioFile.recorder = [[CDVAudioRecorder页头] initWithURL：audioFile.resourceURL设置：recordSettings错误：＆放大器;错误]

   <醇开始=3>
   
3. 更改其他线路：
   CDVSound.m进行检查以确保您使用的是wav文件。只需在文件的顶部改变这个应该prevent这一点。

定义RECORDING_WAV @WAV

我改成了：

 的#define RECORDING_WAV @M4A
 

或

 的#define RECORDING_M4A @M4A
 

和中包含 RECORDING_WAV 变量文件实例变化。

I have a trouble in my app.

I want to record a sound and store it in iOS using Cordova. I have already a base64/wav file, but it's very heavy so I want to convert it into a base64/mp3.

Which is the algorithm that allows me to do that?

Example:

b64Wavtob64mp3("base64/...");
// Return a mp3 base64

Thanks in advance!

解决方案

I forgot completely base64 because I was looking for a audio compressed

Solved!

I did it with a wav2m4a plugin.

https://github.com/xu-li/phonegap-wav2m4a

But I wanted to go further so I modified CDVSound.m at iOS. I just followed these instructions:

https://gist.github.com/jlsuarezs/d48094d431307a466496

1. Add to the startRecordingAudio method on CDVSound.m this:

   NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt: kAudioFormatMPEG4AAC], AVFormatIDKey, [NSNumber numberWithFloat:16000.0], AVSampleRateKey, [NSNumber numberWithInt: 1], AVNumberOfChannelsKey, nil];

2. Replace:

   audioFile.recorder = [[CDVAudioRecorder alloc] initWithURL:audioFile.resourceURL settings:nil error:&error]; // Default PCM recording

   With:

   audioFile.recorder = [[CDVAudioRecorder alloc] initWithURL:audioFile.resourceURL settings:recordSettings error:&error];

   3. Changing another lines: CDVSound.m checks to make sure you're using a wav file. Simply changing this at the top of the file should prevent that.

   define RECORDING_WAV @"wav"

I changed it to:

#define RECORDING_WAV @"m4a"

or

#define RECORDING_M4A @"m4a" 

and change in the file instances that contains the RECORDING_WAV variable.

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