錄音功能研究了一周 總結的簡單的錄音和播放 滿足錄音60秒以内的上傳和下載下傳
用的AVFoundation架構中的 AVAudioRecorder 進行錄音 用 AVAudioPlayer進行的播放
錄音的格式選用的是AAC的,iOS , 安卓可以播放,伺服器需要轉成MP3播放
錄音代碼
AVAudioSession *session = [AVAudioSession sharedInstance];//控制整個系統
NSError *sessionError;
[session setCategory:AVAudioSessionCategoryRecord error:&sessionError];//播放的時候用的AVAudioSessionCategoryPlayback
if (sessionError) {
NSLog(@"設定AVAudioSession大管家的時候報的錯_____%@",sessionError.description);
}//判斷背景有沒有播放
if (session == nil) {
NSLog(@"AVAudioSession背景有播放:%@", [sessionError description]);
} else {
[session setActive:YES error:nil];
}
[self.recorder record];
準備錄音配置
- (AVAudioRecorder *)recorder {
if (_recorder == nil) {
NSMutableDictionary* recordSettingAAC = [[NSMutableDictionary alloc] init];
[recordSettingAAC setValue :[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];//AAC 格式的壓縮比和品質都是實用的,檔案小音質高 AAC(Advanced Audio Coding),中文名:進階音頻編碼,出現于1997年,基于MPEG-2的音頻編碼技術。由Fraunhofer IIS、杜比實驗室、AT&T、Sony等公司共同開發,目的是取代MP3格式。2000年,MPEG-4标準出現後,AAC重新內建了其特性,加入了SBR技術和PS技術,為了差別于傳統的MPEG-2 AAC又稱為MPEG-4 AAC。http://www.mamicode.com/info-detail-986202.html
[recordSettingAAC setValue:[NSNumber numberWithFloat:32000.0] forKey:AVSampleRateKey];//設定錄音采樣率(Hz) 如:AVSampleRateKey==8000/44100/96000(影響音頻的品質), 此處采樣頻率設定成8000就夠用,咱們打電話的采樣平率就是8000 設定成32000 是因為背景轉MP3時的限制
[recordSettingAAC setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];//錄音通道數 1 或 2 ,要轉換成mp3格式必須為雙通道
[recordSettingAAC setValue:[NSNumber numberWithInt:AVAudioQualityMin] forKey:AVEncoderAudioQualityKey];
// [recordSettingAAC setValue:[NSNumber numberWithInt:16] forKey:AVEncoderBitRateKey];//ios7 可以 ios9 以上設定這句話會閃退
[recordSettingAAC setObject:@(8) forKey:AVLinearPCMBitDepthKey]; //線性采樣位數 8、16、24、32
[recordSettingAAC setObject:@(YES) forKey:AVLinearPCMIsFloatKey]; //是否使用浮點數采樣
NSError *error;
_recorder = [[AVAudioRecorder alloc] initWithURL:self.urlRecordFile settings:recordSettingAAC error:&error];
if (error || self.recorder == nil) {
NSLog(@"錄音建立時候的錯誤___%@",error.description);
_recorder.delegate = self;
_recorder.meteringEnabled = YES;
[_recorder prepareToRecord];
return _recorder;
我将錄音檔案 存在 tem 臨時檔案
- (NSURL *)urlRecordFile
{
if (_urlRecordFile == nil) {
_urlRecordFile = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingString:@TmpFile.aac"]];//注意字尾 一定要加上mac 否則上傳給伺服器他們不能判斷檔案類型導緻檔案播放失敗
return _urlRecordFile;
錄音成功後上傳給伺服器:
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
manager.requestSerializer.timeoutInterval = 10;
//上傳檔案流
[manager POST:urlString parameters:dictionary constructingBodyWithBlock:^(idformData) {
[formData appendPartWithFileData:dataVoice name:@"file" fileName:@"text.aac" mimeType:@"audio/mpeg3"];
//NSData *dataVoice = [NSData dataWithContentsOfURL: self.urlRecordFile]];
} success:^(NSURLSessionDataTask *task, id responseObject) {
NSError * error = nil;
NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:&error];
if (!error) {
} failure:^(NSURLSessionDataTask *task, NSError *error) {
}];
下載下傳:
NSData *dataAudio = [NSData dataWithContentsOfURL:[NSURL URLWithString:strURL]];
播放:
[session setCategory:AVAudioSessionCategoryPlayback error:&sessionError];
NSError *playError;
//NSData *data = [NSData dataWithContentsOfURL:self.urlRecordFile];本地的資料也可以進行播放
self.player = [[AVAudioPlayer alloc] initWithData:dataAudio error:&playError];
self.player.delegate = self;
//當播放錄音為空, 列印錯誤資訊
if (self.player == nil) {
NSLog(@"播放器的問題: %@", [playError description]);
[self.player play];
下面說說錄音檔案的大小
[recordSettingAAC setValue:[NSNumber numberWithFloat:16000.0] forKey:AVSampleRateKey];采樣率是16000 蘋果4s 60秒 369kb 性能好的手機相應的錄音檔案會大點
[recordSettingAAC setValue:[NSNumber numberWithFloat:8000.0] forKey:AVSampleRateKey];采樣率是8000 的4s 60秒 250kb
采樣率越大對應的錄音的檔案就越大,因為采樣率大 就意味着采樣的頻率越高,采樣的錄音更加接近原聲。32000的采樣率 生成的錄音檔案大概是800kb 左右
類似QQ錄音那樣根據音量大小展示的相應的動畫的代碼如下:
錄音的時候開啟定時器:
_timer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(updateImage) userInfo:nil repeats:YES];
[_timer fire];
- (void)updateImage {
[self.recorder updateMeters];
double lowPassResults = pow(10, (0.05 * [self.recorder peakPowerForChannel:0]));
float result = 10 * (float)lowPassResults;
NSLog(@"音量%f", result);
int no = 1;
if (result > 0 && result <= 1.5) {
no = 1;
} else if (result > 1.5 && result <= 2.5) {
no = 2;
} else if (result > 2.5 && result <= 3.5) {
no = 3;
} else if (result > 3.5 && result <= 5.0) {
no = 4;
} else if (result > 5.0 && result <= 8) {
no = 5;
} else if (result > 8 ) {
no = 6;
}
//根據音量的大小做相應的幀動畫
self.imaViewLeft.animationDuration = 0.5;//和取聲音的頻率一緻
self.imaViewLeft.animationImages = [self arrayImageAnimationLeftWithNum:num];//這句話是指給imageview添加動畫的圖檔
[self.imaViewLeft startAnimating];
//圖檔數組
- (NSMutableArray *)arrayImageAnimationRightWithNum:(int)num
_arrayImageAnimation = [NSMutableArray arrayWithCapacity:0];
for (int i = 6; i > 0; i--)
NSString *str = [NSString stringWithFormat:@"animation_%d_%d",num,i];
UIImage *image = [UIImage imageNamed:str];
[_arrayImageAnimation addObject:image];
return _arrayImageAnimation;