Use FFMPEG and mencoder in ASP. NET to implement video conversion screenshots

I recently used two tools, FFMPEG and mencoder, to create a video playing system. I checked some materials and found that there were a lot of materials, but it was a bit messy, I sorted it out from the beginning and shared it with you:

1. FFMPEG converts video (AVI, WMV, and other formats) to FLV format:

 

/// <Summary> /// convert the video to FLV /// </Summary> /// <Param name = "FILENAME"> path of the uploaded video file (original file) </param> /// <Param name = "playfile"> the path of the converted file (Network playback file) </param> /// <returns>: 1 failed to be returned: 0 </returns> Public int fchangefilevir (string filename, string playfile) {// string widthoffile = "320"; string heightoffile = "240 "; // obtain the path of ffmpeg.exe. The path is configured on the web. config, for example, <add key = "FFMPEG" value = "E: \ aspx1 \ ffmpeg.exe"/> string FFmpeg = server. mappath (publicmethod. ffmpegtool); If ((! System. Io. file. exists (FFMPEG) | (! System. io. file. exists (filename) {return 0;} // get (. FLV) file relative path string flv_file = system. io. path. changeextension (server. mappath (playfile ),". FLV "); // create the FFMPEG process system. diagnostics. processstartinfo filestartinfo = new system. diagnostics. processstartinfo (FFMPEG); // set the background to run. The window filestartinfo is not displayed. windowstyle = system. diagnostics. processwindowstyle. hidden; // run the compile command to synthesize the parameters required by the ffmpeg.exe file. Run the following command to debug FFMPEG 0.4.9 or above: // 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; try {// start to convert system. diagnostics. process. start (filestartinfo);} catch {return 0;} return 1 ;}

2. mencoder converts video (AVI, WMV, and other formats) to FLV format:

 

 

/// <Summary> /// convert the video to FLV /// </Summary> /// <Param name = "FILENAME"> path of the uploaded video file (original file) </param> /// <Param name = "playfile"> the path of the converted file (Network playback file) </param> /// <returns>: 1 failed to be returned: 0 </returns> Public int mchangefilevir (string filename, string playfile) {// string widthoffile = "320"; string heightoffile = "240 "; // obtain the mencoder.exe path. The path is configured on the web. config, such as: <add key = "mencoder" value = "E: \ aspx1 \ mencoder.exe"/> String tool = server. mappath (publicmethod. mencodertool); // you can check whether the mencoder tool and file exist if ((! System. Io. file. exists (FFMPEG) | (! System. io. file. exists (filename) {return 0;} // get (. FLV) file relative path string flv_file = system. io. path. changeextension (server. mappath (playfile ),". FLV "); // create a tool process system. diagnostics. processstartinfo filestartinfo = new system. diagnostics. processstartinfo (Tool); // sets the background to run filestartinfo. windowstyle = system. diagnostics. processwindowstyle. hidden; // run the filestartinfo parameter. arguments = "" + vfilename + "-o" + flv_file + "-Of lavf-lavfopts audio-OAC mp3lame-lameopts ABR: Br = 56-OVC lavc-lavcopts vcodec = FLV: vbitrate = 200: mbd = 2: mv0: trell: v4mv: White: last_pred = 1: Dia =-1: CMP = 0: vb_strategy = 1-VF scale = "+ widthoffile +": "+ heightoffile +"-ofps 12-srate 22050 "; try {// start to convert the system. diagnostics. process. start (filestartinfo);} catch {return 0;} return 1 ;}

3. FFMPEG video content:

 

 

// Video, filename video address, imgfile image Address Public String catchimg (string filename, string imgfile) {// capture the image string FFMPEG = server using FFMPEG. mappath (publicmethod. ffmpegtool); // image name string flv_img = imgfile + ". jpg "; // image size string flvimgsize = publicmethod. sizeofimg; // establish the FFMPEG process system. diagnostics. processstartinfo imgstartinfo = new system. diagnostics. processstartinfo (FFMPEG); // run imgstartinfo in the background. windowstyle = system. diagnostics. processwindowstyle. hidden; // process parameter // FFMPEG-I input. FLV-y-F image2-SS 10.11-T 0.001-s 240x180 catchimg.jpg; imgstartinfo. arguments = "-I" + filename + "-y-F image2-SS 2-vframes 1-s" + flvimgsize + "" + flv_img; try {// start to capture the image system. diagnostics. process. start (imgstartinfo); // wait for a sleep and set system as needed. threading. thread. sleep (5000);} catch {return ";} // If (system. io. file. exists (flv_img) {return flv_img;} return "";}

 

The principle is very simple. In fact, it is to use system. diagnostics. process calls the FFMPEG and mencoder ready-made tools for work. The key is parameter transmission, mainly depending on the degree of familiarity with FFMPEG and mencoder.