データを記録するために実装したものを添付しています。フォーマットで保存し.wav
ていますが、私の問題は、ファイルのサイズが大きすぎることです (つまり、10 秒間で 86kb かかります)。5 分 300kb のサイズが必要です。たくさんの方法があります、私を助けてくれませんか?
- (IBAction) startRecording
{
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
[audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
if(err){
NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
return;
}
[audioSession setActive:YES error:&err];
err = nil;
if(err){
NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
return;
}
recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:8000.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 1] forKey:AVNumberOfChannelsKey];
[recordSetting setValue:[NSNumber numberWithInt:8] forKey:AVLinearPCMBitDepthKey];
[recordSetting setValue:[NSNumber numberWithBool:NX_BigEndian == NXHostByteOrder()] forKey:AVLinearPCMIsBigEndianKey];
[recordSetting setValue:[NSNumber numberWithBool:0] forKey:AVLinearPCMIsFloatKey];
recorderFilePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"abc.wav"] ;
NSLog(@"recorderFilePath: %@",recorderFilePath);
NSURL *url = [NSURL fileURLWithPath:recorderFilePath];
err = nil;
NSData *audioData = [NSData dataWithContentsOfFile:[url path] options: 0 error:&err];
if(audioData)
{
NSFileManager *fm = [NSFileManager defaultManager];
[fm removeItemAtPath:[url path] error:&err];
}
err = nil;
recorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:&err];
if(!recorder){
NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle: @"Warning"
message: [err localizedDescription]
delegate: nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
//prepare to record
[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];
return;
}
[recorder record];
currentTimeUpdateTimer = [NSTimer scheduledTimerWithTimeInterval:0.5
target:self selector:@selector(updateAudioDisplay)
userInfo:NULL repeats:YES];
}
よろしくお願いします。