objective-c - how to convert (aiff) files to any format that runs on windows OS(.asf, .asx, .avi, .wav, .wax, .wma, .wm, .wmv )?

Question

i'm working on an iPhone project and wants to save mp3 files instead of car, i wrote this code to save record files in .caf extensions:

NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
    [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
    [recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey]; 
    [recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
    NSString *recorderFilePath =[NSString stringWithFormat:@"%@/%@.caf",  DOCUMENTS_FOLDER,fileName];

i tried this:

[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatMPEGLayer3] forKey:AVFormatIDKey];
 NSString *recorderFilePath =[NSString stringWithFormat:@"%@/%@.mp3", DOCUMENTS_FOLDER,fileName];

but it didn't save in mp3 format! is it available in objective c or there's any third party code that makes that, i see that method in AudioToolbox.framework:

OSStatus AudioConverterConvertBuffer (
AudioConverterRef  inAudioConverter,
UInt32             inInputDataSize,

const void         *inInputData,

UInt32             *ioOutputDataSize,

void               *outOutputData

);

any help is welcomed,thanks.

Answer 1

オープン ソース プロジェクトlameがあります。課題は、iPhoneで機能させることです。 これにより、ios のクロス コンパイルに向けた方向性が示されます。

GPLであることにも注意してください。