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• Place two videos side by side using ffmpeg ?and download it as one file

  5 août 2019, par marceloo1223

  I have two video files, which I want to play side by side and download them later. I used FFMPEG to merge them as one :

  protected void combinetwovideo()
  
  {
  
      string strParam;
  
      string Path_FFMPEG = Path.Combine(HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["FFMpegPath"]));
  
      string apppath=HttpRuntime.AppDomainAppPath;
  
      //Merging two videos               
  
      String video1=apppath+"\\recordings\\client2019-08-03 02_23_59";
  
      String video2 =apppath+"\\userrecord\\User2019-08-03 02_24_00";
  
      String strResult =apppath+"\\RESULT\\";
  
      strParam = string.Format("-i ('" + video1 + "') -i ('" + video2 + "') -filter_complex \'[0:v]pad=iw*2:ih[int];[int][1:v]overlay=W/2:0[vid]' /-map [vid] -c:v libx264 -crf 23 -preset veryfast output.mp4");
  
      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)
  
      {
  
      }
  
  }

  But this method outputs nothing and does not throw any errors. I’m confused about the strParam query. Did I write it wrong or am I missing something. Any help would be apreciated.

• Multi bitrate live HLS with FFmpeg on Windows

  16 mai 2014, par Nioreh

  I am trying to encode a live stream into Apple HLS for iPhone on windows. I was looking at different options and wowza can do it, but doesn’t support CDN distribution of HLS as far as I can see. Plus it costs a lot of money.

  What I did find was this site : http://www.espend.de/artikel/iphone-ipad-ipod-http-streaming-segmenter-and-m3u8-windows.html

  I can now set up a single bitrate stream easily, but my goal is an adapive multi-bitrate live stream. Is it possible ? For VOD content it can easily be accomplished with creating the different qualities then linking to them in a new m3u8, but how would this be done in live ?

  I can of course set up three quality live streams and link to them in an m3u8, but how will I get them GOP-aligned in this case ?

  My initial thought was to have one ffmpeg instance create all qualities and re-stream those outputs to new ffmpeg-instances that just remux and pipe to the segmenter. But I would need some way of streaming locally between instances. Can that be done ?

  If anyone has a nice solution to this, or can link to other software capable of live HLS on windows, I would appreciate any input.

  Have a great day !
  Regards
  Carl

• Ffmpeg , overlay two sequences of png's and turn them into a movie

  12 mai 2014, par Lau Llobet

  i’ve found how to turn a png sequence into a movie, also i’ve found how to overlay two movies using transparency but I don’t know how to do both things at once (using png’s tranparency).

  The bottom layer of png’s is smaller than the top one and needs to be stretched to a certain resolution and also have a padding to be centered.

  The output dont have to have alpha (black for alpha is ok).

  I’m a bit confused by the abundance of filter options

  ---

  Edit :

  for the moment i’ve found :

  ./ffmpeg -i ./seq1/%d.bmp -vf "movie=./%d.png [a]; [in][a] overlay=0:366" combined.m2v

  it works , now i’ve got to find the padding and resize things

  ---

  thank you in advance.