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• Creating a thumbnail from MP4 video crashes on shared hosting but working fine locally

  15 juillet 2019, par Mariam Nagy

  i am working on a web page to upload MP4 video and getting a thumbnail from the video

  i am using NReco FFMpeg Converter to achieve this . it is working fine locally but upload it on a shared hosting it crashes at ffMpeg.GetVideoThumbnail

          string VideoUrl = dataMediaUrl.ImageUrl;
  
          string extension = VideoUrl.Split('.')[VideoUrl.Split('.').Length - 1];
  
          var ffMpeg = new NReco.VideoConverter.FFMpegConverter();
  
          string thumbnailJPEGpath = Server.MapPath(VideoUrl.Replace("~/upload/MediaGallery/", "~/upload/MediaGallery/Thumb_").Replace("." + extension, ".jpg"));
  
          ffMpeg.GetVideoThumbnail(Server.MapPath(VideoUrl), thumbnailJPEGpath);
  
          dataThumbUrl.ImageUrl = VideoUrl.Replace("~/upload/MediaGallery/", "~/upload/MediaGallery/Thumb_").Replace("." + extension, ".jpg");

  This is the error I am getting :

  Server Error in '/' Application.
  
  This program is blocked by group policy. For more information, contact your system administrator
  
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 
  
  
  
  Exception Details: System.ComponentModel.Win32Exception: This program is blocked by group policy. For more information, contact your system administrator
  
  
  
  Source Error: 
  
  
  
  An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
  
  
  
  Stack Trace: 
  
  
  
  
  
  [Win32Exception (0x80004005): This program is blocked by group policy. For more information, contact your system administrator]
  
     System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo) +1889
  
     System.Diagnostics.Process.Start() +119
  
     System.Diagnostics.Process.Start(ProcessStartInfo startInfo) +49
  
     NReco.VideoConverter.FFMpegConverter.ConvertMedia(Media input, Media output, ConvertSettings settings) +1163
  
     NReco.VideoConverter.FFMpegConverter.GetVideoThumbnail(String inputFile, String outputFile, Nullable`1 frameTime) +155
  
     Admin_MediaGalleryVideoUpload.InsertButton_Click(Object sender, EventArgs e) +591
  
     System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9782698
  
     System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +204
  
     System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +12
  
     System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +15
  
     System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35
  
     System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1639
  
  
  
  Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3394.0

• Unable to merge videos using ffmpeg within Azure Batch

  7 juillet 2019, par JJuice

  Using a tutorial by MSDN I am trying to build a Batch operation, executed within an Azure Function that merges to videos using FFMPEG. Somehow I am doing something wrong because the merging fails.

  The code where I create the task to merge the videos :

  private static async Task> AddTasksAsync(BatchClient batchClient, string jobId, List<resourcefile> inputFiles, string outputContainerSasUrl)
  
      {
  
          Console.WriteLine("Adding {0} tasks to job [{1}]...", inputFiles.Count, jobId);
  
  
  
          // Create a collection to hold the tasks added to the job:
  
          List<cloudtask> tasks = new List<cloudtask>();
  
  
  
          // Assign a task ID for each iteration
  
          string taskId = String.Format("Task0");
  
  
  
          string appPath = String.Format("%AZ_BATCH_APP_PACKAGE_{0}#{1}%", appPackageId, appPackageVersion);
  
          Console.WriteLine(inputFiles[0].FilePath);
  
          Console.WriteLine(inputFiles[1].FilePath);
  
          Console.WriteLine(inputFiles[2].FilePath);
  
          string outputMediaFile = String.Format("ResultaatFilmpje.MOV");
  
          string taskCommandLine = String.Format("cmd /c {0}\\ffmpeg-20190706-feade2b-win64-static\\bin\\ffmpeg.exe -safe 0 -f concat -i {1} -c copy {2}", 
  
                                              appPath, inputFiles[2].FilePath, outputMediaFile);
  
  
  
          // Create a cloud task (with the task ID and command line) and add it to the task list
  
          CloudTask task = new CloudTask(taskId, taskCommandLine);
  
          task.ResourceFiles = new List<resourcefile> { inputFiles[2] };
  
  
  
          // Task output file will be uploaded to the output container in Storage.
  
  
  
          List<outputfile> outputFileList = new List<outputfile>();
  
          OutputFileBlobContainerDestination outputContainer = new OutputFileBlobContainerDestination(outputContainerSasUrl);
  
          OutputFile outputFile = new OutputFile(outputMediaFile,
  
                                                  new OutputFileDestination(outputContainer),
  
                                                  new OutputFileUploadOptions(OutputFileUploadCondition.TaskSuccess));
  
          outputFileList.Add(outputFile);
  
          task.OutputFiles = outputFileList;
  
          tasks.Add(task);
  
  
  
          // Call BatchClient.JobOperations.AddTask() to add the tasks as a collection rather than making a
  
          // separate call for each. Bulk task submission helps to ensure efficient underlying API
  
          // calls to the Batch service. 
  
          await batchClient.JobOperations.AddTaskAsync(jobId, tasks);
  
  
  
          return tasks;
  
      }
  
  </outputfile></outputfile></resourcefile></cloudtask></cloudtask></resourcefile>

  When I run the same command from the command-line locally it works fine and FFMpeg merges the two videos.

  I think it has something to do with FFMPEG not able to find the input videos. The location of the input files is stored in the file myfile.txt within the same blob storage container as the two videos itself.
  The videos are listed in the myfile.txt as follows :

  file IMG_7442.MOV
  
  file IMG_7456.MOV

  Does anyone have an idea on where the failure is coming from ? Any help would be greatly appreciated !

• Render Multiple Gifs with ffplay/ffmpeg in Winform

  17 juin 2019, par Purqs

  I’m trying to get x number of animated gifs to render on like a Panel or PictureBox and using transparency that is in each gif. I’ve tried a couple approaches but am not super famiular with ffmpeg and such. Below is some code that I use to get it to render inside a panel, but I can’t figure out how to get like 5 gifs to stack/layer on one another and still render as you would expect.

  I need/want this to render in the form and not outputted. I am a little confused to why the ffplay.exe doesn’t use the -i command and that might be why i can’t get it to render. any ideas ?

  Working example below.

  using System;
  
  using System.Collections.Generic;
  
  using System.ComponentModel;
  
  using System.Data;
  
  using System.Drawing;
  
  using System.Linq;
  
  using System.Text;
  
  using System.Threading.Tasks;
  
  using System.Windows.Forms;
  
  using System.Diagnostics;
  
  using System.Threading;
  
  using System.IO;
  
  using System.Reflection;
  
  using System.Runtime.InteropServices;
  
  using System.Drawing.Text;
  
  using System.Text.RegularExpressions;
  
  using System.Configuration;
  
  using Microsoft.Win32;
  
  using System.Windows.Forms.VisualStyles;
  
  
  
  //FOR THIS EXAMPLE CREATE FORM HAVE BUTTON ON IT AND PANEL.
  
  //button: button's click is "button1_Click"
  
  //panel: Needed to output the render on it.
  
  //FILES:
  
  //Test.Gif
  
  //These ff files came from the ffmpeg offical site.
  
  //ffplay.exe //currently using
  
  //ffmpeg.exe //thinking i need to use to get it how I want.
  
  //I most of the code below from https://stackoverflow.com/questions/31465630/ffplay-successfully-moved-inside-my-winform-how-to-set-it-borderless which was a good starting point.
  
  
  
  namespace Test_Form
  
  {
  
      public partial class Form1 : Form
  
      {
  
          [DllImport("user32.dll", SetLastError = true)]
  
          private static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);
  
  
  
          [DllImport("user32.dll")]
  
          private static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
  
  
  
  
  
          //Process ffplay = null;
  
  
  
          public Form1()
  
          {
  
              InitializeComponent();
  
              Application.EnableVisualStyles();
  
              this.DoubleBuffered = true;
  
          }
  
  
  
  
  
  
  
          public Process ffplay = new Process();
  
          private void FFplay()
  
          {
  
              ffplay.StartInfo.FileName = "ffplay.exe";
  
              ffplay.StartInfo.Arguments = "-noborder Test.gif"; //THIS IS WHERE I INPUT THE GIF FILE
  
              ffplay.StartInfo.CreateNoWindow = true;
  
              ffplay.StartInfo.RedirectStandardOutput = true;
  
              ffplay.StartInfo.UseShellExecute = false;
  
  
  
              ffplay.EnableRaisingEvents = true;
  
              ffplay.OutputDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay");
  
              ffplay.ErrorDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay");
  
              ffplay.Exited += (o, e) => Debug.WriteLine("Exited", "ffplay");
  
              ffplay.Start();
  
  
  
              Thread.Sleep(1000); // you need to wait/check the process started, then...
  
  
  
              // child, new parent
  
              // make 'this' the parent of ffmpeg (presuming you are in scope of a Form or Control)
  
              SetParent(ffplay.MainWindowHandle, this.Handle);
  
  
  
              // window, x, y, width, height, repaint
  
              // move the ffplayer window to the top-left corner and set the size to 320x280
  
              MoveWindow(ffplay.MainWindowHandle, 800, 600, 320, 280, true);
  
  
  
              SetParent(ffplay.MainWindowHandle, this.panel1.Handle);
  
              MoveWindow(ffplay.MainWindowHandle, -5, -30, 320, 280, true);
  
          }
  
  
  
  //runs the FFplay Command
  
  private void button1_Click(object sender, EventArgs e)
  
          {
  
              FFplay();
  
  
  
          }
  
  
  
          private void Form1_FormClosed(object sender, FormClosedEventArgs e)
  
          {
  
              try { ffplay.Kill(); }
  
              catch { }
  
          }
  
      }

  I would like the button to allow me to add any number of gifs (like 5 or 10) all to the same area and have them being animated with their transparent showing what is under that gif.

  So for example I could have a circle image, then a spinning/loading transparent gif on top, and then a gif that counts up/down on top of that one to give me the effect of a count-down.

  Thanks for all the help !