Question

我使用BufferedInputStream和BufferedOutputStream以编程方式复制mp4视频。它被正确复制，除了因为我丢失了音频！这是我的代码：

    FileInputStream fi = null;
    FileOutputStream fo = null;
    try {
        File f = new File("C:\\Users\\Zerok\\Videos\\v.mp4");
        fi = new FileInputStream(f);
        fo = new FileOutputStream("video.mp4");
        BufferedInputStream buffIn = new BufferedInputStream(fi);
        BufferedOutputStream buffOut = new BufferedOutputStream(fo);

        int read;
        while((read = buffIn.read()) != -1){
            buffOut.write(read);
        }

    } catch (FileNotFoundException ex) {
        Logger.getLogger(JavaApplication13.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(JavaApplication13.class.getName()).log(Level.SEVERE, null, ex);
    } finally {
        try {
            fi.close();
        } catch (IOException ex) {
            Logger.getLogger(JavaApplication13.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

video.dmp4文件正常工作，除了音频缺失。是什么引起了这个？我正确使用这些类吗？

Answer 1

问题是，我没有关闭我的BufferedOutputStream。我使用了这个try-with-resources块，它会在资源完成后自动关闭它：

 try (BufferedOutputStream buffOut = new BufferedOutputStream(fo)) {
                int read;
                System.out.println("Beginning to copy...");
                while((read = buffIn.read()) != -1){
                    buffOut.write(read);
                }
            }

现在音频再现完美。

使用BufferedInput / OutputStream进行文件管理

1 个答案: