Question

如何在Java中获得声音文件的总时间？

- UPDATE

看起来这段代码可以正常工作： long audioFileLength = audioFile.length（）;

    recordedTimeInSec = audioFileLength / (frameSize * frameRate);

我知道如何获取文件长度，但我没有找到如何获取声音文件的帧速率和帧大小...任何想法或链接？

- 更新

另一个工作代码（使用@ mdma的提示）：

    AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(file);
    AudioFormat format = audioInputStream.getFormat();
    long audioFileLength = file.length();
    int frameSize = format.getFrameSize();
    float frameRate = format.getFrameRate();
    float durationInSeconds = (audioFileLength / (frameSize * frameRate));

Answer 1

给定File你可以写

File file = ...;
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(file);
AudioFormat format = audioInputStream.getFormat();
long frames = audioInputStream.getFrameLength();
double durationInSeconds = (frames+0.0) / format.getFrameRate();

Answer 2

这是一种简单的方法：

FileInputStream fileInputStream = null;
long duration = 0;

try {
    fileInputStream = new FileInputStream(pathToFile);
} catch (FileNotFoundException e) {
    e.printStackTrace();
}

try {
    duration = Objects.requireNonNull(fileInputStream).getChannel().size() / 128;
} catch (IOException e) {
    e.printStackTrace();
}
System.out.println(duration)

如何在Java中获得声音文件的总时间？

2 个答案: