兔聊社交app视频分段录制

原理很简单就是把多个视频文件的内容按顺序写到一个视频文件中
代码如下：



public static void union(String dirPath, String toFilePath) {
    File dir = new File(dirPath);
    if (!dir.exists())
        return;
    File videoPartArr[] = dir.listFiles();
    if (videoPartArr.length == 0)
        return;
    File combineFile = new File(toFilePath);
    try (FileOutputStream writer = new FileOutputStream(combineFile)) {
        byte buffer[] = new byte[1024];
        for (File part : videoPartArr) {
            try (FileInputStream reader = new FileInputStream(part)) {
                while (reader.read(buffer) != -1) {
                    writer.write(buffer);
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}