在上次随笔
Asp.net FMS 开发视频网站 中，好多朋友提到其他视频格式转化成FLV格式的问题，经过网上搜索资料研习整理，现经我的一点思路分享给大家：
我添加了一个转换FLV工程 VideoConvert：
1。配置文件里添加
web.config
1 <appSettings>
2
3 <!--convert tools path-->
4 <add key="FfmpegPath" value="D:\tools\"/>
5
6 <!-- setting -->
7 <add key="ThreadCount" value="5" />
8 <add key="BatchSize" value="10" />
9 <add key="QueueTimeout" value="20" />
10 <add key="TransactionTimeout" value="30" />
11 </appSettings> 2。添加一个接口
IConvert
1using System;
2using System.Collections.Generic;
3using System.Text;
4
5namespace VideoConvert
6{
7 public interface IConvert
8 {
9
10 /**//// <summary>
11 /// 将视频文件转换为Flv格式
12 /// </summary>
13 /// <param name="sourceFile">要转换的文件</param>
14 /// <returns></returns>
15 bool Convert(string sourceFile);
16
17
18
19 /**//// <summary>
20 /// 获取缩略图
21 /// </summary>
22 /// <param name="sourceFile"></param>
23 /// <returns></returns>
24 bool GetSmallImage(string sourceFile);
25
26
27 }
28}
29 3。转换工具设定继承 IConvert
FfmpegConvert
1using System;
2using System.Collections.Generic;
3using System.Text;
4using System.Configuration;
5
6
7namespace VideoConvert
8{
9 public class FfmpegConvert : IConvert
10 {
11
12
13 /**//// <summary>
14 /// 转换软件所在的路径
15 /// </summary>
16 private string ConvertTool = ConfigurationManager.AppSettings["FfmpegPath"] + "ffmpeg.exe";
17
18
19 /**//// <summary>
20 /// 构造函数
21 /// </summary>
22 public FfmpegConvert()
23 {
24
25 }
26
27
28 /**//// <summary>
29 /// 将视频文件转换为Flv格式
30 /// </summary>
31 /// <param name="sourceFile">要转换的文件</param>
32 /// <returns></returns>
33 public bool Convert(string sourceFile)
34 {
35 try
36 {
37 //文件名是否为空
38 if (string.IsNullOrEmpty(sourceFile)) return false;
39 //检测文件是否存在
40
41
42 string TargetFile = sourceFile.Substring(0, sourceFile.Length - 4) + ".flv";
43 string Argu = @"-i " + sourceFile + " -ab 56 -ar 22050 -b 500 -r 15 -s 480x360 " + TargetFile;
44
45 System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(ConvertTool, Argu);
46 System.Diagnostics.Process.Start(startInfo);
47 System.Threading.Thread.Sleep(6000);
48 return true;
49
50 }
51 catch (Exception exp)
52 {
53 throw exp;
54 }
55
56 }
57
58
59 /**//// <summary>
60 /// 获取缩略图
61 /// </summary>
62 /// <param name="sourceFile"></param>
63 /// <returns></returns>
64 public bool GetSmallImage(string sourceFile)
65 {
66
67 //文件名是否为空
68 if (string.IsNullOrEmpty(sourceFile)) return false;
69 //检测文件是否存在
70
71 try
72 {
73 string TargetFile = sourceFile.Substring(0, sourceFile.Length - 4) + ".jpg";
74 string Argu = @"-i " + sourceFile + " -y -f image2 -ss 08.010 -t 0.001 -s 352x240 " + TargetFile;
75 System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(ConvertTool, Argu);
76 System.Diagnostics.Process.Start(startInfo);
77 System.Threading.Thread.Sleep(6000);
78
79
80 //必须等待进行完成后才能返回结果
81
82
83 return true;
84
85 }
86 catch (Exception exp)
87 {
88 throw exp;
89 }
90
91 }
92
93 }
94}
95 4.
program
1using System;
2using System.Collections.Generic;
3using System.Configuration;
4using System.Text;
5using System.Threading;
6using System.Transactions;
7using VideoConvert;
8
9namespace VideoConvert
10{
11 class Program
12 {
13
14 //threadCount
15 private static int threadCount = int.Parse(ConfigurationManager.AppSettings["ThreadCount"]);
16
17 private static IConvert tool = new FfmpegConvert();
18
19 //finished count
20 private static int completeCount = 0;
21
22 static void Main(string[] args)
23 {
24
25
26 Thread workTicketThread;
27 Thread[] workerThreads = new Thread[threadCount];
28
29 for (int i = 0; i < threadCount; i++)
30 {
31
32 workTicketThread = new Thread(new ThreadStart(ProcessVideo));
33
34 // Make this a background thread, so it will terminate when the main thread/process is de-activated
35 workTicketThread.IsBackground = true;
36 workTicketThread.SetApartmentState(ApartmentState.STA);
37
38 // Start the Work
39 workTicketThread.Start();
40 workerThreads[i] = workTicketThread;
41 }
42
43 Console.WriteLine("Converting begin. press Enter stop");
44 Console.ReadLine();
45 Console.WriteLine("cancel");
46
47 //abort all threads
48 for (int i = 0; i < workerThreads.Length; i++)
49 {
50
51 workerThreads[i].Abort();
52 }
53
54 Console.WriteLine();
55 Console.WriteLine(" Processed" + completeCount + "video files");
56 Console.WriteLine(" Process compeleted. press Enter to exit");
57 Console.ReadLine();
58
59
60 }
61
62
63 /**//// <summary>
64 /// Convert
65 /// </summary>
66 /// <returns></returns>
67 private static void ProcessVideo()
68 {
69
70
71 while (true)
72 {
73
74
75
76 if (!string.IsNullOrEmpty(waitConvertFile))
77 {
78 //Convert
79 Console.WriteLine("start to convert file:" + waitConvertFile + "");
80 try
81 {
82 if (tool.Convert(waitConvertFile.PhysicalPath) && tool.GetSmallImage(waitConvertFile.PhysicalPath))
83 {
84 completeCount++;
85
86 //Change waitConvertFile status if need
87
88 }
89 }
90 catch (Exception exp)
91 {
92 //setting Convert failure
93 Console.WriteLine("文件" + waitConvertFile.VideoID + "Convert failure");
94 }
95 Console.WriteLine("文件" + waitConvertFile.VideoID + "Convert ending");
96 Thread.Sleep(1000);
97 }
98 Thread.Sleep(1000 * 60);
99
100
101
102
103
104 }
105
106
107 }
108 }
109} 通过四步，我们视频转换工程就创建完了，这里的主要思路是服务器端调用视频转换工具 ffmpeg.exe，设置参数，通过Main来实现转换。如果有问题请和我联系。
