首先，我們部署一下文件夾.在工程的目錄下新建幾個文件夾如下圖：

UpFiles文件夾是要保存你上傳的文件，PlayFiles文件夾是用于你轉(zhuǎn)換后保存的文件（用于網(wǎng)上播放）

ImgFile文件夾是保存截取視頻文件的圖片，然后那兩個mencoder和ffmpeg文件夾是視頻轉(zhuǎn)換工具.此視頻轉(zhuǎn)換也
可叫做mencoder+ffmpeg視頻轉(zhuǎn)換.
首先，在配置文件中給這些文件夾進(jìn)行路徑的配置.如下
<appSettings>
????????<!--工具文件夾-->
????????<add?key="ffmpeg"?value="ffmpeg/ffmpeg.exe"/>
????<add?key="mencoder"?value="mencoder/mencoder.exe"/>
????<add?key="mplayer"?value="mencoder/mplayer.exe"/>
????????<!--上傳文件的路徑-->
????????<add?key="upfile"?value="UpFiles"/>
????????<!--上專文件圖片路徑-->
????????<add?key="imgfile"?value="ImgFile"/>
????????<!--上傳文件圖片大小-->
????????<add?key="CatchFlvImgSize"?value="240x180"/>
????<add?key="widthSize"?value="400"/>
????<add?key="heightSize"?value="350"/>
????????<!--轉(zhuǎn)換后文件路徑-->
????????<add?key="playfile"?value="PlayFiles"/>
????</appSettings>
在上傳.ASPX頁面中
??標(biāo)題：<asp:TextBox?ID="txtTitle"?runat="server"?Width="358px"></asp:TextBox>
????????<asp:RequiredFieldValidator?ID="RequiredFieldValidator2"?runat="server"?ControlToValidate="txtTitle"
????????????ErrorMessage="標(biāo)題不為空"></asp:RequiredFieldValidator>
???????<br?/>
????????<asp:FileUpload?ID="FileUpload1"?runat="server"?Width="339px"?/>
????????<asp:Button?ID="btnUpload"?runat="server"?OnClick="btnUpload_Click"?Text="上傳視頻"?Width="70px"?/>
????????文件類型<span?style="color:Red;">(.asf|.flv|.avi|.mpg|.3gp|.mov|.wmv|.rm|.rmvb)</span>
????????????<asp:RegularExpressionValidator?ID="imagePathValidator"?runat="server"?ErrorMessage="文件類型不正確"
????????????ValidationGroup="vgValidation"?Display="Dynamic"?ValidationExpression="^[a-zA-Z]:(\\.+)(.asf|.flv|.avi|.mpg|.3gp|.mov|.wmv|.rm|.rmvb)$"
????????????ControlToValidate="FileUpload1">
????????????</asp:RegularExpressionValidator>
????????<asp:RequiredFieldValidator?ID="RequiredFieldValidator1"?runat="server"?ControlToValidate="FileUpload1"
????????????ErrorMessage="文件不為空"></asp:RequiredFieldValidator></div>
????????<div?style="?height:0px;?border-top:solid?1px?red;?font-size:0px;"></div>
????????<div>上傳列表.</div>
程序工作的原理是：視頻先上傳上去，然后跟著就是開始轉(zhuǎn)換.
所以.在CS 文件中有

這里為了方便我是用sqlDatasource數(shù)據(jù)控件做數(shù)據(jù)的操作.

using?System;
using?System.Data;
using?System.Configuration;
using?System.Web;
using?System.Web.Security;
using?System.Web.UI;
using?System.Web.UI.WebControls;
using?System.Web.UI.WebControls.WebParts;
using?System.Web.UI.HtmlControls;

public?partial?class?_Default?:?System.Web.UI.Page?
{
????//?擴(kuò)展名定義
????string[]?strArrFfmpeg?=?new?string[]?{"asf","avi","mpg","3gp","mov"?};
????string[]?strArrMencoder?=?new?string[]?{"wmv","rm","rmvb"?};
????protected?void?Page_Load(object?sender,?EventArgs?e)
????{

????}
????//
????protected?void?btnUpload_Click(object?sender,?EventArgs?e)
????{
????????
????????string?upFileName?=?"";
????????if?(this.FileUpload1.HasFile)
????????{
????????????string?fileName?=?PublicMethod.GetFileName(this.FileUpload1.FileName);//?GetFileName();
????????????if?((string)Session["file"]?==?fileName)
????????????{
????????????????return;
????????????}
????????????upFileName?=?Server.MapPath(PublicMethod.upFile?+?fileName);
????????????this.FileUpload1.SaveAs(upFileName);
????????????string?saveName?=?DateTime.Now.ToString("yyyyMMddHHmmssffff")?;
????????????string?playFile?=?Server.MapPath(PublicMethod.playFile?+?saveName);
????????????string?imgFile?=?Server.MapPath(PublicMethod.imgFile?+?saveName);
????????????//System.IO.File.Copy(Server.MapPath(PublicMethod.playFile?+?"00000002.jpg"),?Server.MapPath(PublicMethod.imgFile+"aa.jpg"));
????????????PublicMethod?pm?=?new?PublicMethod();
????????????string?m_strExtension?=?PublicMethod.GetExtension(this.FileUpload1.PostedFile.FileName).ToLower();
????????????if?(m_strExtension?==?"flv")
????????????{//直接拷貝到播放文件夾下
????????????????System.IO.File.Copy(upFileName,?playFile+".flv");
????????????????pm.CatchImg(upFileName,?imgFile);
????????????}
????????????string?Extension?=?CheckExtension(m_strExtension);
????????????if?(Extension?==?"ffmpeg")
????????????{
???????????????　pm.ChangeFilePhy(upFileName,?playFile,?imgFile);
????????????}
????????????else?if?(Extension?==?"mencoder")
????????????{
?????????????????pm.MChangeFilePhy(upFileName,?playFile,?imgFile);
????????????}
????????????InsertData(this.txtTitle.Text,?fileName,saveName);
????????????Session["file"]?=?fileName;
????????}
????????
????}
?
????//
????private?string?CheckExtension(string?extension)
????{
????????string?m_strReturn?=?"";
????????foreach?(string?var?in?this.strArrFfmpeg)
????????{
????????????if?(var?==?extension)
????????????{
????????????????m_strReturn?=?"ffmpeg";?break;
????????????}
????????}
????????if?(m_strReturn?==?"")
????????{
????????????foreach?(string?var?in?strArrMencoder)
????????????{
????????????????if?(var?==?extension)
????????????????{
????????????????????m_strReturn?=?"mencoder";?break;
????????????????}
????????????}
????????}
????????return?m_strReturn;
????}
????#region?插入數(shù)據(jù)到數(shù)據(jù)庫中
????private?void?InsertData(string?MediaName,string?fileName,string?saveName)
????{
????????//string?name=fileName.Substring(0,?fileName.LastIndexOf('.'));
????????string?imgName?=?saveName?+?".jpg";//圖片文件名;
????????string?playName?=?saveName?+?".flv";
????????string?sqlstr?=?"insert?into?Media(FMediaName,FMediaUpPath,FMediaPlayPath,FMediaImgPath)?values(@MName,@MUppath,@MPlaypath,@MImgpath)";
????????//string?constr?=?ConfigurationManager.ConnectionStrings["sqlcon"].ToString();
????????SqlDataSource1.InsertCommand?=?sqlstr;
????????SqlDataSource1.InsertCommandType?=?SqlDataSourceCommandType.Text;//?CommandType.Text;
????????SqlDataSource1.InsertParameters.Add("MName",MediaName);
????????SqlDataSource1.InsertParameters.Add("MUppath",PublicMethod.upFile+fileName);
????????SqlDataSource1.InsertParameters.Add("MPlaypath",PublicMethod.playFile+playName);
????????SqlDataSource1.InsertParameters.Add("MImgpath",PublicMethod.imgFile+imgName);
????????SqlDataSource1.Insert();
????}
????#endregion
?
}
PublicMethod類如下：
在這個類里面主要是做文件轉(zhuǎn)換和保存，在轉(zhuǎn)換文件的時候CPU的利用率可以達(dá)100%.

它的主要原理是另起一個進(jìn)程在轉(zhuǎn)換的時候你會發(fā)現(xiàn)你的進(jìn)程里多了一個.
using?System;
using?System.Configuration;

///?<summary>
///?Summary?description?for?PublicMethod
///?</summary>
public?class?PublicMethod:System.Web.UI.Page
{
????public?PublicMethod()
????{
?????????
????}
????//文件路徑
????public?static?string?ffmpegtool?=?ConfigurationManager.AppSettings["ffmpeg"];
????public?static?string?mencodertool?=?ConfigurationManager.AppSettings["mencoder"];
????public?static?string?mplayertool?=?ConfigurationManager.AppSettings["mplayer"];
????public?static?string?upFile?=?ConfigurationManager.AppSettings["upfile"]?+?"/";
????public?static?string?imgFile?=?ConfigurationManager.AppSettings["imgfile"]?+?"/";
????public?static?string?playFile?=?ConfigurationManager.AppSettings["playfile"]?+?"/";
????//文件圖片大小
????public?static?string?sizeOfImg?=?ConfigurationManager.AppSettings["CatchFlvImgSize"];
????//文件大小
????public?static?string?widthOfFile?=?ConfigurationManager.AppSettings["widthSize"];
????public?static?string?heightOfFile?=?ConfigurationManager.AppSettings["heightSize"];
????//???//?//獲取文件的名字
????public?static?string?GetFileName(string?fileName)
????{
????????int?i?=?fileName.LastIndexOf("\\")?+?1;
????????string?Name?=?fileName.Substring(i);
????????return?Name;
????}
????//獲取文件擴(kuò)展名
????public?static?string?GetExtension(string?fileName)
????{
????????int?i?=?fileName.LastIndexOf(".")+1;
????????string?Name?=?fileName.Substring(i);
????????return?Name;
????}
????//
????#region?//運(yùn)行FFMpeg的視頻解碼，(這里是絕對路徑)
????///?<summary>
????///?轉(zhuǎn)換文件并保存在指定文件夾下面(這里是絕對路徑)
????///?</summary>
????///?<param?name="fileName">上傳視頻文件的路徑（原文件）</param>
????///?<param?name="playFile">轉(zhuǎn)換后的文件的路徑（網(wǎng)絡(luò)播放文件）</param>
????///?<param?name="imgFile">從視頻文件中抓取的圖片路徑</param>
????///?<returns>成功:返回圖片虛擬地址;???失敗:返回空字符串</returns>
????public??string?ChangeFilePhy(string?fileName,?string?playFile,?string?imgFile)
????{
????????//取得ffmpeg.exe的路徑,路徑配置在Web.Config中,如:<add???key="ffmpeg"???value="E:\51aspx\ffmpeg.exe"???/>???
????????string?ffmpeg?=?Server.MapPath(PublicMethod.ffmpegtool);
????????if?((!System.IO.File.Exists(ffmpeg))?||?(!System.IO.File.Exists(fileName)))
????????{
????????????return?"";
????????}

????????//獲得圖片和(.flv)文件相對路徑/最后存儲到數(shù)據(jù)庫的路徑,如:/Web/User1/00001.jpg???
???????
????????string?flv_file?=?System.IO.Path.ChangeExtension(playFile,?".flv");


????????//截圖的尺寸大小,配置在Web.Config中,如:<add???key="CatchFlvImgSize"???value="240x180"???/>???
????????string?FlvImgSize?=?PublicMethod.sizeOfImg;

????????System.Diagnostics.ProcessStartInfo?FilestartInfo?=?new?System.Diagnostics.ProcessStartInfo(ffmpeg);

????????FilestartInfo.WindowStyle?=?System.Diagnostics.ProcessWindowStyle.Hidden;

????????FilestartInfo.Arguments?=?"?-i?"?+?fileName?+?"?-ab?56?-ar?22050?-b?500?-r?15?-s?"?+?widthOfFile?+?"x"?+?heightOfFile?+?"?"?+?flv_file;
????????//ImgstartInfo.Arguments?=?"???-i???"?+?fileName?+?"???-y???-f???image2???-t???0.05???-s???"?+?FlvImgSize?+?"???"?+?flv_img;

????????try
????????{
????????????//轉(zhuǎn)換
????????????System.Diagnostics.Process.Start(FilestartInfo);
????????????//截圖
????????????CatchImg(fileName,?imgFile);
????????????//System.Diagnostics.Process.Start(ImgstartInfo);
????????}
????????catch
????????{
????????????return?"";
????????}
????????//
????????return?"";
????}
????//
????public?string?CatchImg(string?fileName,string?imgFile)
????{
????????//
????????string?ffmpeg?=?Server.MapPath(PublicMethod.ffmpegtool);
????????//
????????string?flv_img?=imgFile+".jpg";
????????//
????????string?FlvImgSize?=?PublicMethod.sizeOfImg;
????????//
????????System.Diagnostics.ProcessStartInfo?ImgstartInfo?=?new?System.Diagnostics.ProcessStartInfo(ffmpeg);
????????ImgstartInfo.WindowStyle?=?System.Diagnostics.ProcessWindowStyle.Hidden;
????????//
????????ImgstartInfo.Arguments?=?"???-i???"?+?fileName?+?"??-y??-f??image2???-ss?2?-vframes?1??-s???"?+?FlvImgSize?+?"???"?+?flv_img;
????????try
????????{
????????????System.Diagnostics.Process.Start(ImgstartInfo);
????????}
????????catch
????????{
????????????return?"";
????????}
????????//
????????if?(System.IO.File.Exists(flv_img))
????????{
????????????return?flv_img;
????????}

????????return?"";
????}
????#endregion
????//
????#region?//運(yùn)行FFMpeg的視頻解碼，(這里是(虛擬)相對路徑)
????///?<summary>
????///?轉(zhuǎn)換文件并保存在指定文件夾下面(這里是相對路徑)
????///?</summary>
????///?<param?name="fileName">上傳視頻文件的路徑（原文件）</param>
????///?<param?name="playFile">轉(zhuǎn)換后的文件的路徑（網(wǎng)絡(luò)播放文件）</param>
????///?<param?name="imgFile">從視頻文件中抓取的圖片路徑</param>
????///?<returns>成功:返回圖片虛擬地址;???失敗:返回空字符串</returns>
????public??string?ChangeFileVir(string?fileName,?string?playFile,?string?imgFile)
????{
????????//取得ffmpeg.exe的路徑,路徑配置在Web.Config中,如:<add???key="ffmpeg"???value="E:\51aspx\ffmpeg.exe"???/>???
????????string?ffmpeg?=?Server.MapPath(PublicMethod.ffmpegtool);
????????if?((!System.IO.File.Exists(ffmpeg))?||?(!System.IO.File.Exists(fileName)))
????????{
????????????return?"";
????????}

????????//獲得圖片和(.flv)文件相對路徑/最后存儲到數(shù)據(jù)庫的路徑,如:/Web/User1/00001.jpg???
????????string?flv_img?=?System.IO.Path.ChangeExtension(Server.MapPath(imgFile),?".jpg");
????????string?flv_file?=?System.IO.Path.ChangeExtension(Server.MapPath(playFile),?".flv");


????????//截圖的尺寸大小,配置在Web.Config中,如:<add???key="CatchFlvImgSize"???value="240x180"???/>???
????????string?FlvImgSize?=?PublicMethod.sizeOfImg;

????????System.Diagnostics.ProcessStartInfo?FilestartInfo?=?new?System.Diagnostics.ProcessStartInfo(ffmpeg);
????????System.Diagnostics.ProcessStartInfo?ImgstartInfo?=?new?System.Diagnostics.ProcessStartInfo(ffmpeg);

????????FilestartInfo.WindowStyle?=?System.Diagnostics.ProcessWindowStyle.Hidden;
????????ImgstartInfo.WindowStyle?=?System.Diagnostics.ProcessWindowStyle.Hidden;
????????//此處組合成ffmpeg.exe文件需要的參數(shù)即可,此處命令在ffmpeg???0.4.9調(diào)試通過?
????????//ffmpeg?-i?F:\01.wmv?-ab?56?-ar?22050?-b?500?-r?15?-s?320x240?f:\test.flv
????????FilestartInfo.Arguments?=?"?-i?"?+?fileName?+?"?-ab?56?-ar?22050?-b?500?-r?15?-s?"?+?widthOfFile?+?"x"?+?heightOfFile?+?"?"?+?flv_file;
????????ImgstartInfo.Arguments?=?"???-i???"?+?fileName?+?"???-y???-f???image2???-t???0.001???-s???"?+?FlvImgSize?+?"???"?+?flv_img;

????????try
????????{
????????????System.Diagnostics.Process.Start(FilestartInfo);
????????????System.Diagnostics.Process.Start(ImgstartInfo);
????????}
????????catch
????????{
????????????return?"";
????????}

????????/**/
????????///注意:圖片截取成功后,數(shù)據(jù)由內(nèi)存緩存寫到磁盤需要時間較長,大概在3,4秒甚至更長;???
????????///這兒需要延時后再檢測,我服務(wù)器延時8秒,即如果超過8秒圖片仍不存在,認(rèn)為截圖失敗;???
????????///此處略去延時代碼.如有那位知道如何捕捉ffmpeg.exe截圖失敗消息,請告知,先謝過!???
????????if?(System.IO.File.Exists(flv_img))
????????{
????????????return?flv_img;
????????}

????????return?"";
????}
????#endregion

????#region?//運(yùn)行mencoder的視頻解碼器轉(zhuǎn)換(這里是(絕對路徑))
????public?string?MChangeFilePhy(string?vFileName,?string?playFile,?string?imgFile)
????{
????????string?tool?=?Server.MapPath(PublicMethod.mencodertool);
????????//string?mplaytool?=?Server.MapPath(PublicMethod.ffmpegtool);
????????
????????if?((!System.IO.File.Exists(tool))?||?(!System.IO.File.Exists(vFileName)))
????????{
????????????return?"";
????????}

????????string?flv_file?=?System.IO.Path.ChangeExtension(playFile,?".flv");


????????//截圖的尺寸大小,配置在Web.Config中,如:<add???key="CatchFlvImgSize"???value="240x180"???/>???
????????string?FlvImgSize?=?PublicMethod.sizeOfImg;

????????System.Diagnostics.ProcessStartInfo?FilestartInfo?=?new?System.Diagnostics.ProcessStartInfo(tool);
???????
????????FilestartInfo.WindowStyle?=?System.Diagnostics.ProcessWindowStyle.Hidden;
????????FilestartInfo.Arguments?=?"?"?+?vFileName?+?"?-o?"?+?flv_file?+?"?-of?lavf?-lavfopts
?? i_certify_that_my_video_stream_does_not_use_b_frames?-oac?mp3lame?-lameopts?abr:br=56?-ovc?lavc
-lavcopts?vcodec=flv:vbitrate=200:mbd=2:mv0:trell:v4mv:cbp:last_pred=1:dia=-1:cmp=0:vb_strategy=1
-vf?scale="?+?widthOfFile?+?":"?+heightOfFile?+?"?-ofps?12?-srate?22050";
????????try
????????{
????????????System.Diagnostics.Process.Start(FilestartInfo);
????????????CatchImg(flv_file,?imgFile);
????????}
????????catch
????????{
????????????return?"";
????????}?
????????//
????????return?"";
????}
????#endregion
}

轉(zhuǎn)載于:https://www.cnblogs.com/moviestar/archive/2007/12/21/1009388.html

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