如何在Scala中以5MB块的迭代从本地文件写入二进制文件?

我目前正在尝试获取一个15MB的视频文件,该文件存储在我的计算机本地,并将该文件以二进制文件格式写入到5MB的块中。我正试图让它适用于任何文件大小,它将较大的文件格式拆分成较小的5MB块。

    val chunksize: Int = 5242880
    val byteArray = Files.readAllBytes(Paths.get("/path/to/inputfile"))
    val fos = new FileOutputStream("/path/to/outputfile")
    val ret = new Array[Array[Byte]](Math.ceil(byteArray.length / chunksize.asInstanceOf[Double]).toInt, chunksize)
    var start = 0
    var i = 0
    while ( {
      i < ret.length
    }) {
      ret(i) = util.Arrays.copyOfRange(byteArray, start, start + chunksize)
      start += chunksize

      //Here is where i need to write the bytes to a file output stream so I can get a binary file of less than 5MB

      {
        i += 1; i - 1
      }

    }

    fos.close()