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• alternative for ffmpeg without using ffmpeg

  24 mars 2016, par sanoj lawrence

  amusing following code to get image from video(snapshot)

  <?php
  
  $ffmpeg = 'ffmpeg\bin\ffmpeg.exe';
  
  $video  = 'upload/'.$location;
  
  $image  = 'upload/thumb/'.$random_name.'.jpg';
  
  $second = 1;
  
  $cmd = "$ffmpeg -i $video 2>&1";
  
  if (preg_match('/Duration: ((\d+):(\d+):(\d+))/s', `$cmd`, $time)) {
  
      $total = ($time[2] * 3600) + ($time[3] * 60) + $time[4];
  
      $second = rand(1, ($total - 1));
  
  }
  
  $cmd = "$ffmpeg -i $video -deinterlace -an -ss $second -t 00:00:01 -r 1 -y -vcodec mjpeg -f mjpeg $image 2>&1";
  
  $return = `$cmd`;
  
  ?>

  how do i get snapshot form video without using ffmpeg

  by using jquery or java is it possible like extraction snapshot and video duration for video

  because recently i found this using id3 detecting video duration etc.

• FFmpeg - divide single .webm video into multiple videos (each representing part of the screen) specifying rows and columns count

  23 mai 2022, par salveiro

  Can FFmpeg divide one big rectangular video into x smaller rectangular ones ?
What would be a command for it ?

  


  Can we parametrize the command with number of rows and columns we desire ?

  


  Can we somehow prevent loosing pixel precision when command is provided with improper rows/column count for source video resolution ?

  


• How can I capture and record only specific part of the desktop using ffmpeg ?

  23 juillet 2018, par Benzi Avrumi

  This is how I’m using now to record the desktop.

  Using ffmpeg.exe : ffmpeg -f gdigrab -framerate 24 -i desktop -preset ultrafast -pix_fmt yuv420p out.mp4

  Or using csharp :

   using System;  
  
      using System.Collections.Generic;  
  
      using System.Linq;  
  
      using System.Text;  
  
      using System.Threading.Tasks;  
  
      using System.IO;  
  
      using System.Diagnostics;  
  
  
  
      namespace Ffmpeg_App  
  
      {  
  
          class Ffmpeg  
  
          {  
  
              Process process;  
  
  
  
              public void Start(string FileName, int Framerate)  
  
              {  
  
                  process = new System.Diagnostics.Process();  
  
                  process.StartInfo.FileName = @"D:\ffmpegx86\ffmpeg.exe"; // Change the directory where ffmpeg.exe is.  
  
                  process.EnableRaisingEvents = false;  
  
                  process.StartInfo.WorkingDirectory = @"D:\ffmpegx86"; // The output directory  
  
                  process.StartInfo.Arguments = @"-f gdigrab -framerate " + Framerate + " -i desktop -preset ultrafast -                                                                     pix_fmt yuv420p " + FileName;  
  
                  process.Start();  
  
                  process.StartInfo.UseShellExecute = false;  
  
                  process.StartInfo.CreateNoWindow = false;  
  
                  Close();  
  
              }  
  
  
  
              public void Close()  
  
              {  
  
                  process.Close();  
  
              }  
  
          }  
  
      }  

  And using it like this for example :

  Ffmpeg fpeg = new Ffmpeg(); 
  
  
  
  
  
      private void Start_Click(object sender, EventArgs e)  
  
              {  
  
                  fpeg.Start("test.mp4", 24);  
  
              }  
  
  
  
  
  
      private void Stop_Click(object sender, EventArgs e)  
  
              {  
  
                  fpeg.Close();  
  
              } 

  This will record the entire desktop window to a video file.
  But how can I record a specific rectangle area in the desktop ? For example to record only the right bottom corner rectangle size 10x10.

  So when I will play the video file I will see full screen video but only of the right bottom corner of the desktop.