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• Widescreen Converter for mp4 Video files [duplicate]

  25 février 2017, par seking

  This question already has an answer here :

  • FFmpeg : How to convert vertical video with black sides, to video 16:9, with blurred background sides
    
    2 answers
    

  i am looking for a possibility ( php / linux ) to convert any kind of mp4 video into a widescreen format... like a picture widescreen converter

  

  The left and right part of the image does not need to be blurred.. it could be black as well. I don’t care.

  The program should recognize if the video is not 16:9 format and then convert it.

  Is this possible with ffmpeg ? I cannot find a solution for this but I have seen converted videos like that.

  EDIT : Found the solution !

• Broadcast a stream using IP camera in .NET Core Angular

  8 janvier 2020, par Q.Rey

  i’m trying to broadcast a stream using IP camera inside a web page.I want to get the stream from the camera in my backend, to send it via an api. So it’s look like an RTSP conversion to HTTP.

  I read tens of topic and the most mentionned solution is FFMPEG.

  So related to this topic and a different ffmpeg command i’m stuck on how to convert RTSP to HTTP, maybe should i convert ffmpeg content to bytes ?

  Here is my service method to get the camera stream :

  public async Task<bool> GetStreamFromCamera(int cameraID)
  
          {
  
              Camera camera = await _context.Cameras.FirstOrDefaultAsync(m => m.Id == cameraID);
  
              var process = new Process()
  
              {
  
                  StartInfo = new ProcessStartInfo()
  
                  {
  
                      FileName = "ffmpeg",        
  
                      Arguments = String.Format("-i rtsp://whatever -f mpeg1video -b 800k -r 30 http://{ip}", camera.IP),
  
                      UseShellExecute = false,
  
                      CreateNoWindow = true,
  
                      RedirectStandardOutput = true,
  
                      RedirectStandardError = true
  
                  },
  
                  EnableRaisingEvents = true
  
              };
  
  
  
              process.ErrorDataReceived += (sender, data) => Console.WriteLine(data.Data);
  
  
  
              process.Start();
  
              process.BeginErrorReadLine();
  
              return true;
  
          }
  
  </bool>

  I take care of any suggestions, help, related topics, thanks in advance.

• Capture ffmpeg's metadata output in powershell

  17 janvier 2021, par xdhmoore

  I'm trying to capture the output of ffmpeg in PowerShell(tm) to get some metadata on some ogg & mp3 files. But when I do :

  



  ffmpeg -i file.ogg 2>&1 | sls GENRE


  



  The output includes a bunch of lines without my matching string, "GENRE" :

  



        album_artist    : Post Human Era
      ARTIST          : Post Human Era
      COMMENT         : Visit http://posthumanera.bandcamp.com
      DATE            : 2013
      GENRE           : Music
      TITLE           : Supplies
      track           : 1
At least one output file must be specified


  



  I am guessing something is different in the encoding. ffmpeg's output is colored, so maybe there are color control characters in the output that are breaking things ? Or, maybe ffmpeg's output isn't playing nicely with powershell's default UTF-16 ? I can't figure out if there is another way to redirect stderr and remove the color characters or change the encoding of stderr.

  



  EDIT :
Strangely, I also get indeterminate output. Sometimes the output is as shown above. Sometimes with precisely the same command the output is :

  



        GENRE           :


  



  

  



  Which makes slightly more sense, but is still missing the part of the line I care about ('Music').

  



  Somewhere powershell is interpreting something as newlines that is not newlines.