C#视频转换为flv代码

  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
<appSettings> <!--convert tools path--> <add key="FfmpegPath" value="D:/tools/"/> <!-- setting --> <add key="ThreadCount" value="5" /> <add key="BatchSize" value="10" /> <add key="QueueTimeout" value="20" /> <add key="TransactionTimeout" value="30" /> </appSettings>

  2。添加一个接口 
using System; using System.Collections.Generic; using System.Text; namespace VideoConvert { public interface IConvert { /** <summary> /// 将视频文件转换为Flv格式 /// </summary> /// <param name="sourceFile">要转换的文件</param> /// <returns></returns> bool Convert(string sourceFile); /** <summary> /// 获取缩略图 /// </summary> /// <param name="sourceFile"></param> /// <returns></returns> bool GetSmallImage(string sourceFile); } }

转换工具设定继承 IConvert

using 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}

4.using 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。