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Asp.net FMS 开发视频网站

2008-11-18 10:13 387 查看
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***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:

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using System;
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using System.IO;
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using System.Web;
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/**//// <summary>
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/// Summary description for FLVStreaming
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/// </summary>
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public class FLVStreaming : IHttpHandler
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{
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private static readonly byte[] _flvheader = HexToByte("464C5601010000000900000009"); //"FLV/x1/x1/0/0/0/x9/0/0/0/x9"
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public FLVStreaming()
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{
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}
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public void ProcessRequest(HttpContext context)
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{
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try
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{
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int pos;
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int length;
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// Check start parameter if present
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string filename = Path.GetFileName(context.Request.FilePath);
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using (FileStream fs = new FileStream(context.Server.MapPath(filename), FileMode.Open, FileAccess.Read, FileShare.Read))
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{
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string qs = context.Request.Params["start"];
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if (string.IsNullOrEmpty(qs))
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{
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pos = 0;
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length = Convert.ToInt32(fs.Length);
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}
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else
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{
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pos = Convert.ToInt32(qs);
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length = Convert.ToInt32(fs.Length - pos) + _flvheader.Length;
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}
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// Add HTTP header stuff: cache, content type and length
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context.Response.Cache.SetCacheability(HttpCacheability.Public);
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context.Response.Cache.SetLastModified(DateTime.Now);
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context.Response.AppendHeader("Content-Type", "video/x-flv");
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context.Response.AppendHeader("Content-Length", length.ToString());
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// Append FLV header when sending partial file
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if (pos > 0)
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{
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context.Response.OutputStream.Write(_flvheader, 0, _flvheader.Length);
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fs.Position = pos;
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}
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// Read buffer and write stream to the response stream
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const int buffersize = 16384;
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byte[] buffer = new byte[buffersize];
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int count = fs.Read(buffer, 0, buffersize);
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while (count > 0)
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{
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if (context.Response.IsClientConnected)
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{
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context.Response.OutputStream.Write(buffer, 0, count);
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count = fs.Read(buffer, 0, buffersize);
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}
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else
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{
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count = -1;
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}
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}
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}
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}
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catch (Exception ex)
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{
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System.Diagnostics.Debug.WriteLine(ex.ToString());
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}
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}
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public bool IsReusable
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{
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get

{ return true; }
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}
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private static byte[] HexToByte(string hexString)
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{
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byte[] returnBytes = new byte[hexString.Length / 2];
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for (int i = 0; i < returnBytes.Length; i++)
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returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
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return returnBytes;
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}
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}
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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 。
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