Recherche avancée

Sur d’autres sites (5316)

• FFMPEG Convert HTML 5 Video NOT Working

  2 juillet 2016, par Brad

  I am using FFMPEG to convert a video to .mp4, ,ogg, .webm so that it may be viewed in all HTML5 capable browsers using the video tag. The problem is that I manage to convert the video to the 3 required formats but it does not display the video in the video tag, all I get is IE9 : red cross, Firefox : Grey cross, could it be a problem with the conversion or is it something to do with the way I am adding them to the source of the video tag. Here is what I have done :

  1. FFmpeg command line(s) :

     ffmpeg -i test.mp4 test.mp4
     
     ffmpeg -i test.mp4 test.ogg
     
     ffmpeg -i test.mp4 test.webm

  2. Here is the video tag :

     <video height="340" width="470" preload="true" autobuffer="true" controls="true">
     
         <source src="test.ogg" type="video/ogg"></source>
     
         <source src="test.mp4" type="video/mp4"></source>
     
     </video>

  3. Webconfig lines for the video support :

     <staticcontent>
     
         <mimemap fileextension=".mp4" mimetype="video/mp4"></mimemap>
     
         <mimemap fileextension=".ogg" mimetype="audio/ogg"></mimemap>
     
         <mimemap fileextension=".oga" mimetype="audio/ogg"></mimemap>
     
         <mimemap fileextension=".ogv" mimetype="video/ogg"></mimemap>
     
         <mimemap fileextension=".webm" mimetype="video/webm"></mimemap>
     
     </staticcontent>

  It would be great if someone could send me the required parameters for ffmpeg to convert the video to the 3 required formats and an example of how they setting the source in the video tag to display them again. And any other advise would be great like how to set the quality up etc when doing the conversion.

  Thanks in advance.

• Merge videos in c# asp.net using ffmpeg

  3 juillet 2012, par Arun Kumar

  Is it possible to merge the two videos by c# asp.net with the help of ffmpeg. In the ffmpeg documentation they gave us cat command. But it wont works in asp.net. I thought it only for linux.

  cat intermediate1.mpg intermediate2.mpg > intermediate_all.mpg

  asp.net execute this command but there is no output. Help me.

  namespace demo
  
  {
  
      public partial class Default : System.Web.UI.Page
  
      {
  
          protected void Button2_Click(object sender, EventArgs e)
  
          {
  
              string strFile = "cars1.flv";
  
              MergeFiles(strFile);
  
          }
  
  
  
          public void MergeFiles(string strFile)
  
          {
  
              string strParam;
  
              string Path_FFMPEG = Server.MapPath("~/ffmpeg/bin/ffmpeg.exe");
  
  
  
              //Converting a video into mp4 format
  
              string strOrginal = Server.MapPath("~/Videos/");
  
              strOrginal = strOrginal + strFile;
  
              string strConvert = Server.MapPath("~/Videos/ConvertedFiles/");
  
              string strExtn = Path.GetExtension(strOrginal);
  
              if (strExtn != ".mp4")
  
              {
  
                  strConvert = strConvert + strFile.Replace(strExtn, ".mp4");
  
                  strParam  = "-i " + strOrginal + " " + strConvert;
  
                  //strParam = "-i " + strOrginal + " -same_quant " + strConvert;
  
                  process(Path_FFMPEG, strParam);
  
              }
  
  
  
              //Merging two videos               
  
              String video1 = Server.MapPath("~/Videos/Cars1.mp4");
  
              String video2 = Server.MapPath("~/Videos/ConvertedFiles/Cars2.mp4");
  
              String strResult = Server.MapPath("~/Videos/ConvertedFiles/Merge.mp4");
  
              //strParam = "-loop_input -shortest -y -i " + video1 + " -i " + video2 + " -acodec copy -vcodec mjpeg " + strResult;
  
  
  
              strParam = " -i " + video1 + " -i " + video2 + " -acodec copy -vcodec mjpeg " + strResult;
  
  
  
              process(Path_FFMPEG, strParam);
  
          }
  
  
  
          public void process(string Path_FFMPEG, string strParam)
  
          {
  
              try
  
              {
  
                  Process ffmpeg = new Process();
  
                  ProcessStartInfo ffmpeg_StartInfo = new ProcessStartInfo(Path_FFMPEG, strParam);
  
                  ffmpeg_StartInfo.UseShellExecute = false;
  
                  ffmpeg_StartInfo.RedirectStandardError = true;
  
                  ffmpeg_StartInfo.RedirectStandardOutput = true;
  
                  ffmpeg.StartInfo = ffmpeg_StartInfo;
  
                  ffmpeg_StartInfo.CreateNoWindow = true;
  
                  ffmpeg.EnableRaisingEvents = true;
  
                  ffmpeg.Start();
  
                  ffmpeg.WaitForExit();
  
                  ffmpeg.Close();
  
                  ffmpeg.Dispose();
  
                  ffmpeg = null;
  
              }
  
              catch (Exception ex)
  
              {
  
  
  
              }
  
          }
  
  
  
      }
  
  }

• How to extract all the frames from video file instead only one frame ?

  14 avril 2023, par Sheron Blumental

  I tried this parameters :

  


  "-r 1 -i" + ts + " -r 1" + _infilepath+"\"$filename%03d.png"


  


  but it does nothing it's not extracting any frames in the output window :

  


  

  


  the original paramters are :

  


  "-ss " + ts + " "
                    + "-i \"" + _infilepath + "\" "
                    + "-frames:v 1 "
                    + "-hide_banner -y -sn "
                    + "\"" + outfile + "\""


  


  but this extract only one the first frame.

  


  _ffpath contains the ffmpeg exe file
_infilepath contains the mp4 video file
outfile contains the saved frame file

  


  The method CommandRunner is in the bottom.

  


  private void Extract(){
            if (_infilepath.Length == 0) {
                MessageBox.Show(this, "The input file cannot be empty", "Validation error", MessageBoxButtons.OK,
                    MessageBoxIcon.None);
                return;
            }
            if (_outfilepath.Length == 0) {
                MessageBox.Show(this, "The output file cannot be empty", "Validation error", MessageBoxButtons.OK,
                    MessageBoxIcon.None);
                return;
            }
            File.Delete(_outfilepath);
            var exf = new ExtractProgressForm();
            exf.Show(this);
            string ts = tsin.Text.Replace(" ", "0");
            string outfile = _outfilepath.Replace("%t", ts.Replace(":", "-").Replace(".", "_"));
            _extractcr = new CommandRunner(
                _ffpath, 

                "-r 1 -i" + ts + " -r 1" + _infilepath+"\"$filename%03d.png"

                /*"-ss " + ts + " "
                + "-i \"" + _infilepath + "\" "
                + "-frames:v 1 "
                + "-hide_banner -y -sn "
                + "\"" + outfile + "\""*/,
                false
            );


  


  The method CommandRunner :

  


  public CommandRunner(string fname, string args = "", bool autostart = true){
            _fname = fname;
            _args = args;

            if (!_fileExists())
                throw new FileNotFoundException(fname + " cannot be found");

            Proc = new Process();
            Proc.StartInfo.RedirectStandardOutput = true;
            Proc.StartInfo.RedirectStandardError = true;
            Proc.StartInfo.FileName = _fname;
            if (_args.Length > 0)
                Proc.StartInfo.Arguments = _args;
            Proc.StartInfo.UseShellExecute = false;
            Proc.StartInfo.CreateNoWindow = true;
            if (autostart)
                Start();
        }