用fileStream.write 将加密后的TS流数据写入文件，速度超级慢，跪求高手帮忙解决，标题一定要长

[maya728]

代码如下：
FileStream fs;
fs = File.Create(textBox1.Text+".cpk");
while (true)
{
ret = Get_next_TSPacket(iName, tspacket);
if (ret != 0)
break;
cryptpacket = tspacket;
if(Parse_TSPacket(tspacket,ref offset,ref size) != 0)
{
ivv_bak = aes_ivv;
Aes_crypto(tspacket,cryptpacket,size,ivv_bak,aes_ivv);
cops++;
}
fs.Write(cryptpacket,0,188);
progressBar1.Minimum = 1;
progressBar1.Maximum = cops;
// progressBar1.Maximum = 100;
progressBar1.Step = 1;
progressBar1.PerformStep();
}

[maya728]

下面的那个是进度条，有个小问题，它的最大值是不确定的，run 的时候会前后变化。。。⊙﹏⊙b汗