The answers provided in How do I get a sound file’s total time in Java? work well for wav files, but not for mp3 files.
They are (given a file):
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(file);
AudioFormat format = audioInputStream.getFormat();
long frames = audioInputStream.getFrameLength();
double durationInSeconds = (frames+0.0) / format.getFrameRate();
and:
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));
They give the same correct result for wav files, but wrong and different results for mp3 files.
Any idea what do I have to do to get the mp3 file's duration?
Using MP3SPI:
private static void getDurationWithMp3Spi(File file) throws UnsupportedAudioFileException, IOException {
AudioFileFormat fileFormat = AudioSystem.getAudioFileFormat(file);
if (fileFormat instanceof TAudioFileFormat) {
Map<?, ?> properties = ((TAudioFileFormat) fileFormat).properties();
String key = "duration";
Long microseconds = (Long) properties.get(key);
int mili = (int) (microseconds / 1000);
int sec = (mili / 1000) % 60;
int min = (mili / 1000) / 60;
System.out.println("time = " + min + ":" + sec);
} else {
throw new UnsupportedAudioFileException();
}
}