C#上傳視訊生成縮圖
阿新 • • 發佈：2018-12-30
注意：需要FFmpeg軟體，用到ffmpeg.exe；FFmpeg是一個開源免費跨平臺的視訊和音訊流方案，屬於自由軟體，採用LGPL或GPL許可證（依據你選擇的元件）。它提供了錄製、轉換以及流化音視訊的完整解決方案。
前臺程式碼
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /> </div> </form> </body> </html>
後臺程式碼
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace WebApplication1 { public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { string imgfileExp = this.FileUpload1.PostedFile.FileName.Substring(this.FileUpload1.PostedFile.FileName.LastIndexOf(".") + 1); string filename = "11223344"; string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName); //檔名稱 string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName).ToLower(); //檔案的字尾名(小寫) if (imgfileExp.ToLower() == "flv" || imgfileExp.ToLower() == "mp4") { Response.Write("uploadfile\\" + filename + "." + imgfileExp); this.FileUpload1.PostedFile.SaveAs(Server.MapPath("uploadfile") + "\\" + fileName); string ffmpeg = Server.MapPath("ffmpeg.exe");//E:\視訊縮圖測試\html string filenames = Server.MapPath("uploadfile") + "\\" + filename + "." + imgfileExp; //Response.Write("<br/>" + this.CatchImg("uploadfile/" + filename + "." + imgfileExp));//可以使用 CatchImg1("/uploadfile/" + fileName);//可以使用經過整理 } } /// <summary> /// 上傳視訊生成縮圖 /// </summary> /// <param name="vFileName"></param> /// <param name="SmallPic"></param> /// <returns></returns> public string CatchImg(string vFileName) { try { string ffmpeg = "ffmpeg.exe"; ffmpeg = Server.MapPath(ffmpeg); string aaa = System.Web.HttpContext.Current.Server.MapPath(vFileName); if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(System.Web.HttpContext.Current.Server.MapPath(vFileName)))) { return ""; } //獲得圖片相對路徑/最後儲存到資料庫的路徑,如:/Web/FlvFile/User1/00001.jpg string flv_img = System.IO.Path.ChangeExtension(vFileName, ".jpg"); //圖片絕對路徑,如:D:\Video\Web\FlvFile\User1\0001.jpg string flv_img_p = Server.MapPath("/uploadfile/1.jpg"); //截圖的尺寸大小,配置在Web.Config中,如:<add key="CatchFlvImgSize" value="140x110" /> string FlvImgSize = "140x110"; System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg); startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal; //此處組合成ffmpeg.exe檔案需要的引數即可,此處命令在ffmpeg 0.4.9除錯通過 startInfo.Arguments = " -i " + Server.MapPath(vFileName) + " -y -f image2 -t 0.1 -s " + FlvImgSize + " " + flv_img_p; try { System.Diagnostics.Process.Start(startInfo); } catch { return ""; } System.Threading.Thread.Sleep(4000); /**/ ///注意:圖片擷取成功後,資料由記憶體快取寫到磁碟需要時間較長,大概在3,4秒甚至更長; if (System.IO.File.Exists(flv_img_p)) { return flv_img_p.Replace(Server.MapPath("~/"), ""); ; } return ""; } catch { return ""; } } /// <summary> /// 上傳視訊生成縮圖 /// </summary> /// <param name="vFileName"></param> /// <param name="SmallPic"></param> /// <returns></returns> public string CatchImg1(string vFileName) { try { string ffmpeg = "/ffmpeg.exe"; ffmpeg = Server.MapPath(ffmpeg); if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(Server.MapPath(vFileName)))) { return ""; } string flv_img = System.IO.Path.ChangeExtension(vFileName, ".jpg"); string flv_img_p = Server.MapPath(flv_img); string FlvImgSize = "140x110"; System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg); startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal; startInfo.Arguments = " -i " + Server.MapPath(vFileName) + " -y -f image2 -t 0.1 -s " + FlvImgSize + " " + flv_img_p; try { System.Diagnostics.Process.Start(startInfo); } catch { return ""; } System.Threading.Thread.Sleep(4000); if (System.IO.File.Exists(flv_img_p)) { return flv_img_p.Replace(Server.MapPath("~/"), ""); ; } return ""; } catch { return ""; } } } }