我有一个使用AVAudioRecorder和AVAudioPlayer的应用程序。它录制并播放得很好,但有时录制会在一分钟左右切断。这不会一直发生,当它发生时,它仍会像录制一样(audioRecorderEncodeErrorDidOccur不会被调用,audioRecorderDidFinishRecording会在用户停止录制时执行)。声音文件本身虽然在一分钟内被截断。AVAudioRecorder切断录音
这里是我使用的编码(被appsdocdir/somethingrandom.m4a的文件和文件名得到正确创建soundFileURL):
NSDictionary *recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue:[NSNumber numberWithInt:kAudioFormatAppleLossless] 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];
NSError *error = nil;
self->audioRecorder = nil;
audioRecorder = [[AVAudioRecorder alloc]
initWithURL:soundFileURL
settings:recordSetting
error:&error];
if (error)
{
NSLog(@"error: %@", [error localizedDescription]);
} else {
audioRecorder.delegate = self;
[audioRecorder prepareToRecord];
audioRecorder.meteringEnabled = YES;
}
我认为它的编码问题,因为如果我看设备日志我看到这一点:
5月10日10时17分23秒叔iPhone mediaserverd [39]:10:17:23.451 < 0x282f000> AudioConverterNew返回-50
五月10十时17分23秒叔iPhone mediaserverd [39]:10:17:23.453 < 0x282f000> IO_ChangeIOFormat:错误-50
5月10日十时17分23秒叔iPhone mediaserverd [39]:10:17 :23.463 < 0x282f000> Queue_ChangeIOFormat:失败(-50)
编辑:有人问是什么soundFileURL。我在上面简单地提到过,但这里是实际的代码。记录后文件和文件名全都看起来正确:
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"MMMMdyyyyA"];
NSString *recordDate = [formatter stringFromDate:[NSDate date]];
filename = [[NSString alloc] initWithFormat:@"%d-%@.m4a", idNumber, recordDate];
NSArray *dirPaths;
NSString *docsDir;
dirPaths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
NSString *soundFilePath = [docsDir
stringByAppendingPathComponent:filename];
soundFileURL = [NSURL fileURLWithPath:soundFilePath];
你的设备上进行测试? – matt 2013-05-10 18:05:46
你作为soundFileURL拥有什么? – 2013-05-10 18:10:20
亚光:是的。在iPhone上测试5 – tharris 2013-05-10 19:38:26