如何在iphone中获取录制音频的时间？ [英] How can i get time of my recorded audio in iphone?

问题描述

我正在使用 AVAudioRecorder 录制音频，现在我想获得录制音频的准确持续时间，我该怎么做。

I am recording audio using AVAudioRecorder,and now i want to get exact time duration of my recorded audio,how can i get that.

我试过这个：

AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:avAudioRecorder.url options:nil];
CMTime time = asset.duration;
double durationInSeconds = CMTimeGetSeconds(time);

但我的时间变量返回NULL和 durationInSeconds 返回'nan'，这对nan来说意味着什么。

But my time variable return NULL and durationInSeconds return 'nan',what does that means by nan.

UPDATE

user1903074 答案已经解决了我的问题，但仅仅是为了好奇，是没有 AVAudioplayer 。

user1903074 answer have solved my problem but just for curiosity ,is thair any way to do it without AVAudioplayer.

推荐答案

如果您使用 AVAudioPlayer AVAudioRecorder 比你可以得到 audioPlayer.duration 并得到时间。

If you are using AVAudioPlayer with AVAudioRecorder than you can get the audioPlayer.duration and get the time.

喜欢这个。

 NSError *playerError;

 audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:yoururl error:&playerError];

 NSlog(@"%@",audioPlayer.duration);

但仅当您使用 AVAudioPlayer 时 AVAudioRecorder 。

更新

或者你可以这样做。

//put this where you start recording
     myTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(updateTime) userInfo:nil repeats:YES];

// a method for update
- (void)updateTime {
    if([recorder isRecording])
    {

        float minutes = floor(recorder.currentTime/60);
        float seconds = recorder.currentTime - (minutes * 60);

        NSString *time = [[NSString alloc] 
                                    initWithFormat:@"%0.0f.%0.0f",
                                    minutes, seconds];
    }
}

钢铁你可以得到一些延迟因为它们是微秒价值，我不知道如何剪辑它。但那就是全部。

steel you can get some delay becouse their is some microsecond value,and i dont know how to clip it .but thats all.

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