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• How to stream frames from ffmpeg to a process ?

  7 mars, par Vorac

  I would like to encrypt camera frames before transmitting. For that purpose the encrypting process needs to get the raw frames through some mode of IPC. I tried reading through the steaming API docs but got lost. This is an "what approach" question instead of a "working solution" one.

  


• How to specify the GPU to be used by nvenc in ffmpeg [closed]

  25 septembre 2022, par Gio

  I'm using compiled ffmpeg executable for transcoding mpegts stream from h264 to h265 with nvenc. I have two nvidia Graphics Cards installed on my motherboard : GeForce GTX 690 and Tesla k-10. Is there any codec specific parameters for nvenc to choose the GPU I want to encode with ?

  


• Failed to load resource : the server responded with a status of 404 (Not Found)

  28 août 2013, par Kaushik

  This problem is quite unsolvable for me.. I have a Fileupload control and I upload only Video files. Then I use ffmpeg to obtain a frame [image] from that video to display it as a preview. But I am unable to load that image into Image control. The Image will be saving in the specified folder but not able to load it and gives the error which I mentioned in topic.

  This is my aspx code..

  <div class="transbox" runat="server">
  
              <fieldset style="width:50%; margin-left:300px">
  
              <legend style="color:white;font-family:&amp;#39;Palatino Linotype&amp;#39;">Upload Video Files</legend>
  
                  
  
                  
  
                  
  
              </fieldset>
  
  
  
          
  
              <div class="head" runat="server"><label>Write Description</label>
  
                  
  
              </div>
  
              <div runat="server" style="margin-top:22px;">
  
  
  
              </div>
  
          
  
       </div>

  and this my aspx.cs code..

  protected void uploadedFile_Click(object sender, EventArgs e)
  
      {
  
          if (Page.IsPostBack)
  
          {
  
              if (UploadImages.HasFiles)
  
              {
  
  
  
                  string fileExt = Path.GetExtension(UploadImages.FileName).ToLower();
  
                  if (fileExt == ".flv" || fileExt == ".avi" || fileExt == ".mp4" || fileExt == ".3gp" || fileExt == ".mov" || fileExt == ".wmv" || fileExt == ".mpg" || fileExt == ".asf" || fileExt == ".swf")
  
                  {
  
                      foreach (HttpPostedFile uploadedFile in UploadImages.PostedFiles)
  
                      {
  
                          count += 1;
  
  
  
                          filepath = Server.MapPath("~/Videos/" + uploadedFile.FileName);
  
                          uploadedFile.SaveAs(filepath);
  
                          vurl.Add(uploadedFile.FileName.ToString());
  
                          newpath = createvidImage(filepath);
  
  
  
                          try
  
                          {
  
                              createImgPanel();
  
                              Image nimg = Page.FindControl("img" + count) as Image;
  
                              nimg.ImageUrl = "../Images/Video_Thumbs/" + newpath.ToString();
  
                              al.Add(newpath.ToString());
  
                          }
  
  
  
                          catch (Exception ex)
  
                          {
  
                              Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('" + ex.Message.ToString() + "!!');", true);
  
                          }
  
  
  
                      }
  
                      Session["name2"] = al;
  
                      Session["vurl"] = vurl;
  
                  }
  
                  else
  
                  {
  
                      lblerror2.Text = "Please select only Image Files";
  
                  }
  
  
  
              }
  
              else
  
              {
  
                  lblerror2.Text = "Please select File/s";
  
              }
  
          }
  
  
  
      }
  
      public void createImgPanel()
  
      {
  
          StringBuilder sb = new StringBuilder();
  
          tid = tid + 1;
  
          textid = "txt" + tid;
  
          ta = new TextBox();
  
          img = new Image();
  
          ta.TextMode = TextBoxMode.MultiLine;
  
          dload = new HtmlGenericControl("div");
  
          updtpanel.Visible = true;
  
          dload.Attributes.Add("class", "dataload");
  
  
  
          dload.ID = "ind" + tid;
  
          img.CssClass = "loadimg";
  
  
  
          img.ID = "img" + tid;
  
          img.Attributes.Add("runat", "server");
  
          ta.Attributes.Add("class", "txtdes");
  
          ta.ID = textid;
  
  
  
          dload.Controls.Add(img);
  
          dload.Controls.Add(ta);
  
          dback.Controls.Add(dload);
  
      }
  
  
  
      public string createvidImage(string fpath)
  
      {
  
          string thumbname = "";
  
          string newthumb = "";
  
          string newpath1 = "";
  
          if (Page.IsPostBack)
  
          {
  
              string link = "";
  
              link = fpath.ToString();
  
  
  
              Guid nid = Guid.NewGuid();
  
  
  
              thumbname = Server.MapPath("..//Images//Video_Thumbs//") + nid + ".jpg";
  
              newthumb = nid + ".jpg";
  
  
  
              string param = String.Format("-ss {0} -i \"" + link + "\" -s 150*120  -vframes 1 -f image2 -vcodec mjpeg \"" + thumbname + "\"", 20);
  
              Process p = new Process();
  
              p.StartInfo.Arguments = param;
  
              p.StartInfo.FileName = Server.MapPath("..//ffmpeg//ffmpeg.exe");
  
              p.StartInfo.CreateNoWindow = false;
  
              p.StartInfo.UseShellExecute = false;
  
              p.Start();
  
              newpath1 = newthumb.ToString();
  
          }
  
          return newpath1;
  
      }