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• reading ffmpeg output and sending it to a form

  3 juillet 2013, par Aeon2058

  I can run arguments through ffmpeg just fine, but I need to be able to read its output LIVE as it streams (as you may know, ffmpeg can take a while, and it updates its stderr twice a second with current frame, etc).

  I have a form called prog that was declared globally with ProgressForm prog = new ProgressForm(); The user inputs a folder of video files, some data is gathered, and then a button is pushed to start the encoding process with ffmpeg. The button_click event creates a new thread like so :

   runFFMpeg = new Thread(run_ffmpeg);
  
   runFFMpeg.start();

  runFFMpeg was initialized globally earlier with private Thread runFFMpeg;.

  Now I have the method run_ffmpeg :

  private void run_ffmpeg()
  
  {
  
      string program = "C:\\ffmpeg64.exe";
  
      string args = //some arguments that I know work;
  
  
  
      ProcessStartInfo run = new ProcessStartInfo(program,args);
  
      run.UseShellExecute = false;
  
      run.CreateNoWindow = true;
  
      run.RedirectStandardOutput = true;
  
      run.RedirectStandardError = true;
  
      Process runP = new Process();
  
      runP = Process.Start(run);
  
      runP.WaitForExit();
  
  
  
      //NOW WHAT?
  
  
  
   }

  I'm not sure what to do now to get the data LIVE, but if I can, I would be updating prog, which has a number of controls, including progress bars, etc. Typical output (that I'm interested in) looks like "frame= 240 fps= 12.8 q=0.0 size= 1273802kB time=00:00:08.008 bitrate=4415.2kbits/s dup=46 drop=0". I know how to parse that to get what I need, I just need that line !

• avfilter/af_biquads : add lattice-ladder form

  2 novembre 2020, par Paul B Mahol

  avfilter/af_biquads : add lattice-ladder form
  

  • [DH] doc/filters.texi
  • [DH] libavfilter/af_biquads.c

• how can a photo list with title at bottom to form a video in ffmpeg

  21 décembre 2019, par shrw

  I a have 500 images in folder with file name.

  I want a video with 5 seconds delay on each image.

  With title and scrolling text at the bottom.