最初由Martin Dow回答
import java.io.*;import javax.sound.sampled.*;class AudioFileProcessor {public static void main(String[] args) { copyAudio("/tmp/uke.wav", "/tmp/uke-shortened.wav", 2, 1);}public static void copyAudio(String sourceFileName, String destinationFileName, int startSecond, int secondsToCopy) {AudioInputStream inputStream = null;AudioInputStream shortenedStream = null;try { File file = new File(sourceFileName); AudioFileFormat fileFormat = AudioSystem.getAudioFileFormat(file); AudioFormat format = fileFormat.getFormat(); inputStream = AudioSystem.getAudioInputStream(file); int bytesPerSecond = format.getframeSize() * (int)format.getframeRate(); inputStream.skip(startSecond * bytesPerSecond); long framesOfAudioToCopy = secondsToCopy * (int)format.getframeRate(); shortenedStream = new AudioInputStream(inputStream, format, framesOfAudioToCopy); File destinationFile = new File(destinationFileName); AudioSystem.write(shortenedStream, fileFormat.getType(), destinationFile);} catch (Exception e) { println(e);} finally { if (inputStream != null) try { inputStream.close(); } catch (Exception e) { println(e); } if (shortenedStream != null) try { shortenedStream.close(); } catch (Exception e) { println(e); } }}}
