IOS中AVAudioRecorder录音问题

来源：互联网发布：vue.js pc端ui框架编辑：程序博客网时间：2024/06/01 16:09

新QQ交流群：418536818，之前的群已满

-(void)doStartRecordName:(NSString *)name{

_cafName = name;

name = [NSString stringWithFormat:@"%@.caf",name];

NSString *cafFilePath = [self.tmpCAFPathstringByAppendingPathComponent:name];//创建录音存储路径

NSURL *cafURL = [NSURLfileURLWithPath:cafFilePath];

NSError *error;

NSLog(@"cafURL:%@" ,cafURL);

NSDictionary *recordFileSettings =

[[NSDictionary alloc] initWithObjectsAndKeys:

[NSNumber numberWithFloat: 44100.0],AVSampleRateKey, //采样率

[NSNumber numberWithInt: kAudioFormatLinearPCM],AVFormatIDKey,

[NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,//采样位数默认 16

[NSNumber numberWithInt: 2], AVNumberOfChannelsKey,//通道的数目

[NSNumber numberWithBool:NO],AVLinearPCMIsBigEndianKey,//大端还是小端是内存的组织方式

[NSNumber numberWithBool:NO],AVLinearPCMIsFloatKey,nil];//采样信号是整数还是浮点数

NSLog(@"cafURL=%@",cafURL);

self.avRecorder = [[AVAudioRecorderalloc]initWithURL:cafURLsettings:recordFileSettingserror:&error];

self.avRecorder.delegate =self;

//开启音量检测

self.avRecorder.meteringEnabled =YES;

[self.avRecorderprepareToRecord];

[self.avRecorderrecord];

}

如题这个时候理论上是可以正常录音和测量音量的，实际情况却是真机的时候有问题，基本的就是声音没有变化，然后无法正常录音，当然在模拟器上是可以正常工作的。

这个时候需要加上下面一段代码，最好是有录音按钮页面启动的时候就添加

AVAudioSession * audioSession = [AVAudioSession sharedInstance];

[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: &error]; //设置音频类别，这里表示当应用启动，停掉后台其他音频

[audioSession setActive:YES error: &error];//设置当前应用音频活跃性

下面是定时显示音量动画

timer = [NSTimerscheduledTimerWithTimeInterval:0.1ftarget:selfselector:@selector(detectionVoice)userInfo:nilrepeats:YES];

/**

* 定时音量检测动画

- (void)detectionVoice

{

[self.qn.avRecorderupdateMeters];//刷新音量数据

//获取音量的平均值 [recorder averagePowerForChannel:0];

//音量的最大值 [recorder peakPowerForChannel:0];

double lowPassResults = pow(10, (0.05 * [self.qn.avRecorderpeakPowerForChannel:0]));

NSLog(@"%lf",lowPassResults);

//最大50 0

//图片小-》大

if (0<lowPassResults<=0.06) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_01.png"]];

}else if (0.06<lowPassResults<=0.13) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_02.png"]];

}else if (0.13<lowPassResults<=0.20) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_03.png"]];

}else if (0.20<lowPassResults<=0.27) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_04.png"]];

}else if (0.27<lowPassResults<=0.34) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_05.png"]];

}else if (0.34<lowPassResults<=0.41) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_06.png"]];

}else if (0.41<lowPassResults<=0.48) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_07.png"]];

}else if (0.48<lowPassResults<=0.55) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_08.png"]];

}else if (0.55<lowPassResults<=0.62) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_09.png"]];

}else if (0.62<lowPassResults<=0.69) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_10.png"]];

}else if (0.69<lowPassResults<=0.76) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_11.png"]];

}else if (0.76<lowPassResults<=0.83) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_12.png"]];

}else if (0.83<lowPassResults<=0.9) {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_13.png"]];

}else {

[self.voiceHighImageViewsetImage:[UIImageimageNamed:@"record_animate_14.png"]];

}

//取消音量动画

[self.voiceHighImageViewremoveFromSuperview];

[timer invalidate];

timer = nil;

最后再扯一点，IOS和安卓录音格式不同便与通用应该转为MP3格式,lame是安卓和IOS通用的转换第三方文件

导入.a和.h文件后需要转换

- (void)doChangeMP3{

NSString *fileName = _cafName;

fileName = [fileName stringByAppendingString:@".caf"];

NSString *cafFilePath = [self.tmpCAFPathstringByAppendingPathComponent:fileName];//caf文件地址

// NSString *cafFilePath =[_strCAFPath stringByAppendingPathComponent:cafFileName];

// NSDateFormatter *fileNameFormat=[[NSDateFormatter alloc] init];

// [fileNameFormat setDateFormat:@"yyyyMMddhhmmss"];

// NSString *mp3FileName = [fileNameFormat stringFromDate:[NSDate date]];

NSString * mp3FileName = _cafName;

mp3FileName = [mp3FileName stringByAppendingString:@".mp3"];

NSString *mp3FilePath = [self.tmpMp3PathstringByAppendingPathComponent:mp3FileName];

@try {

int read, write;

FILE *pcm = fopen([cafFilePathcStringUsingEncoding:1],"rb");//被转换的文件

FILE *mp3 = fopen([mp3FilePathcStringUsingEncoding:1],"wb");//转换后文件的存放位置

const int PCM_SIZE =8192;

const int MP3_SIZE =8192;

short int pcm_buffer[PCM_SIZE*2];

unsigned char mp3_buffer[MP3_SIZE];

lame_t lame = lame_init();

lame_set_in_samplerate(lame,44100);

lame_set_VBR(lame,vbr_default);

lame_init_params(lame);

do {

read = fread(pcm_buffer, 2*sizeof(short int), PCM_SIZE, pcm);

if (read == 0)

write = lame_encode_flush(lame, mp3_buffer, MP3_SIZE);

else

write = lame_encode_buffer_interleaved(lame, pcm_buffer, read, mp3_buffer, MP3_SIZE);

fwrite(mp3_buffer, write, 1, mp3);

} while (read != 0);

lame_close(lame);

fclose(mp3);

fclose(pcm);

}

@catch (NSException *exception) {

NSLog(@"%@",[exceptiondescription]);

}

@finally {

}

if (self.mp3Path) {

self.mp3Path(mp3FilePath);//MP3地址

}

0 0