昨天看到利用FMS（Flash Media Server）做在线视频录制的资料，地址：
http://www.cincn.com/article.asp?id=15，还有播放流式FLV文件的资料，地址：
http://blogs.ugidotnet.org/kfra/archive/2006/10/04/50003.aspx，很好，把我高兴坏了，所以有了FMS架设视频服务器的想法， ，主要内容如下：
开发步骤：
1。下载FMS
http://blogs.ugidotnet.org/kfra/archive/2006/10/04/50003.aspx，安装配置。
2。使用flash制作FMS视频采集的控件。
3。aspx页面嵌入FMS采集控件，运行采集数据上传到FMS服务器，修改数据库的视频文件存放地址。
4。页面嵌入Flash播放控件，加入FLV处理流代码：
1
using System;
2using System.IO;
3using System.Web;
4
5
6
/**//// <summary>
7
/// Summary description for FLVStreaming
8
/// </summary> 9public class FLVStreaming : IHttpHandler
10
{
11 private static readonly byte[] _flvheader = HexToByte("464C5601010000000900000009"); //"FLV\x1\x1\0\0\0\x9\0\0\0\x9"
12
13 public FLVStreaming()
14
{
15
}
16
17 public void ProcessRequest(HttpContext context)
18 {
19 try
20 {
21 int pos;
22 int length;
23
24 // Check start parameter if present
25 string filename = Path.GetFileName(context.Request.FilePath);
26
27 using (FileStream fs = new FileStream(context.Server.MapPath(filename), FileMode.Open, FileAccess.Read, FileShare.Read))
28 {
29 string qs = context.Request.Params["start"];
30
31 if (string.IsNullOrEmpty(qs))
32 {
33 pos = 0;
34 length = Convert.ToInt32(fs.Length);
35 }
36 else
37 {
38 pos = Convert.ToInt32(qs);
39 length = Convert.ToInt32(fs.Length - pos) + _flvheader.Length;
40 }
41
42 // Add HTTP header stuff: cache, content type and length
43 context.Response.Cache.SetCacheability(HttpCacheability.Public);
44 context.Response.Cache.SetLastModified(DateTime.Now);
45
46 context.Response.AppendHeader("Content-Type", "video/x-flv");
47 context.Response.AppendHeader("Content-Length", length.ToString());
48
49 // Append FLV header when sending partial file
50 if (pos > 0)
51 {
52 context.Response.OutputStream.Write(_flvheader, 0, _flvheader.Length);
53 fs.Position = pos;
54 }
55
56 // Read buffer and write stream to the response stream
57 const int buffersize = 16384;
58 byte[] buffer = new byte[buffersize];
59
60 int count = fs.Read(buffer, 0, buffersize);
61 while (count > 0)
62 {
63 if (context.Response.IsClientConnected)
64 {
65 context.Response.OutputStream.Write(buffer, 0, count);
66 count = fs.Read(buffer, 0, buffersize);
67 }
68 else
69 {
70 count = -1;
71 }
72 }
73 }
74 }
75 catch (Exception ex)
76 {
77 System.Diagnostics.Debug.WriteLine(ex.ToString());
78 }
79 }
80
81 public bool IsReusable
82 {
83 get { return true; }
84 }
85
86 private static byte[] HexToByte(string hexString)
87 {
88 byte[] returnBytes = new byte[hexString.Length / 2];
89 for (int i = 0; i < returnBytes.Length; i++)
90 returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
91 return returnBytes;
92 }
93
94}
95
修改配置文件，运行页面即可调出视频，播放速度很不错。虽说轻描淡写但已经给出应用Asp.net开发视频网站的思路。如果有兴趣可以联系我。如转载请注明来源、作者及出处，谢谢 。
posted @ 2007-06-13 14:59
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