Voip电话录音

Question

我正在创建一个记录通话的应用。我使用了AVRecorder，但我的问题是，当我正常录制它录制语音但是当我试图在通话时录制语音时它不会录制通话。没有在Caf文件中显示任何数据。

这是我的录制代码并停止录制。

/ *此方法用于开始录制此方法可以通过使用调用任何你想要开始录制的地方   [self startRecording]; * /

- (void) startRecording{


AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
[audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
if(err){
    NSLog(@"audioSession: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
    return;
}
[audioSession setActive:YES error:&err];
err = nil;
if(err){
    NSLog(@"audioSession: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
    return;
}

recordSetting = [[NSMutableDictionary alloc] init];



[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];

[recordSetting setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
[recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];



// Create a new dated file
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];


 NSDate *now = [NSDate dateWithTimeIntervalSinceNow:0];
 // NSData *finaldate =[NSData dataWithData:now];

NSString *caldate = [dateFormatter stringFromDate:now];
recorderFilePath = [NSString stringWithFormat:@"%@/%@.caf", Temp_Folder, caldate] ;
recoName = caldate;

NSURL *url = [NSURL fileURLWithPath:recorderFilePath];
err = nil;
recorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:&err];
if(!recorder){
    NSLog(@"recorder: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
    UIAlertView *alert =
    [[UIAlertView alloc] initWithTitle: @"Warning"
                               message: [err localizedDescription]
                              delegate: nil
                     cancelButtonTitle:@"OK"
                     otherButtonTitles:nil];
    [alert show];

    return;
}

/* prepare to record Conversation */

[recorder setDelegate:self];
[recorder prepareToRecord];
recorder.meteringEnabled = YES;

BOOL audioHWAvailable = audioSession.inputIsAvailable;
if (! audioHWAvailable) {
    UIAlertView *cantRecordAlert =
    [[UIAlertView alloc] initWithTitle: @"Warning"
                               message: @"Audio input hardware not available"
                              delegate: nil
                     cancelButtonTitle:@"OK"
                     otherButtonTitles:nil];
    [cantRecordAlert show];
    //[cantRecordAlert release];
    return;
}

// start recording
[recorder recordForDuration:(NSTimeInterval) 1000000];

}

/ *停止录制音频* /

- (void) stopRecording{

[recorder stop];

NSURL *url = [NSURL fileURLWithPath: recorderFilePath];
NSError *err = nil;
NSData *audioData = [NSData dataWithContentsOfFile:[url path] options: 0 error:&err];

NSLog(@"Audio Data :::: %@",audioData);
if(!audioData)
    NSLog(@"audio data: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
[editedObject setValue:[NSData dataWithContentsOfURL:url] forKey:@"vivek"];

}