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• How do I stop watermarking videos with this ffmpeg command line ?

  26 juillet 2019, par D. Messier

  I’m trying to remove the code that adds a watermark to some of our videos, but can’t find the correct solution

  Working with pre-existing code. I am unfamiliar with bash and ffmpeg. We are trying to remove the code that adds a watermark to certain videos. There are plenty of examples on how to add the watermark. But using them to figure out how to remove it has been unsuccessful.

  Original Code

  FFREPORT=file=$folder/ffmpeg.log:level=40 ~/tools/ffmpeg/ffmpeg -ss $startTime -i $folder/0 -i assets/watermark.png -filter_complex "[0:v]scale='if(gt(iw,ih),$size1w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size1h)'[bg];[bg][1:v]overlay=20:(main_h-overlay_h-20),split=5[in1][in2][in3][in4][in5];[in1]scale='if(gt(iw,ih),$size1w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size1h)'[out1];[in2]scale='if(gt(iw,ih),$size2w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size2h)'[out2];[in3]scale='if(gt(iw,ih),$size3w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size3h)'[out3];[in4]scale='if(gt(iw,ih),$size4w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size4h)'[out4];[in5]scale='if(gt(iw,ih),$size4w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size4h)'[out5]" \

  Attempted Change

  I removed -i assets/watermark.png and [bg];[bg][1:v]overlay=20:(main_h-overlay_h-20),

  FFREPORT=file=$folder/ffmpeg.log:level=40 ~/tools/ffmpeg/ffmpeg -ss $startTime -i $folder/0 -filter_complex "[0:v]scale='if(gt(iw,ih),$size1w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size1h)';split=5[in1][in2][in3][in4][in5];[in1]scale='if(gt(iw,ih),$size1w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size1h)'[out1];[in2]scale='if(gt(iw,ih),$size2w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size2h)'[out2];[in3]scale='if(gt(iw,ih),$size3w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size3h)'[out3];[in4]scale='if(gt(iw,ih),$size4w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size4h)'[out4];[in5]scale='if(gt(iw,ih),$size4w,trunc(oh*a/2)*2)':'if(gt(iw,ih),trunc(ow/a/2)*2,$size4h)'[out5]" \

  The error I’m getting is

  Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_split_1

• Cant find file or directory

  25 juillet 2019, par Mister from Belarus

  Suprocess cant find file or directory from python script

  I`ve tried to convert mp3 to wav with subprocess and it works with cmd, when i write ffmpeg -i file.mp3 file.wav, but indetical code on python cant find my files. ffmpeg version N-94387-g923d5c489f.

  subprocess.call([’ffmpeg’, ’-i’, ’file.mp3’,
  ’file.wav’], cwd=r’C :/Users/Lenovo/Desktop’)

  Users/Lenovo/PycharmProjects/coloon/main.py
  Traceback (most recent call last) :
  File "C :/Users/Lenovo/PycharmProjects/coloon/main.py", line 4, in
  ’file.wav’], cwd=r’C :/Users/Lenovo/Desktop’)
  File "C :\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 267, in call
  with Popen(*popenargs, **kwargs) as p :
  File "C :\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 707, in init
  restore_signals, start_new_session)
  File "C :\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 990, in _execute_child
  startupinfo)
  FileNotFoundError : [WinError 2] Не удается найти указанный файл

  I`ve also tried to use this

  subprocess.call(['ffmpeg', '-i', r'D:/file.mp3',
  
                   r'D:/file.wav'])

  but result is the same.

• How do I execute an ffmpeg cmd to command line using C# ?

  24 juin 2019, par TonysAlwayslost

  I am having an issuing trying to get a form app on visual studio 19 to execute a cmd on command line for converting a video from mp4 to avi.
  I am using ffmpeg for this but everytime I compile it wont pick anything up.

  I have ran the argument through command line and it converts the video just fine. The path as far as I am aware is correct so I am not sure why the compiler wont pick up on any files.

  private void Button1_Click(object sender, EventArgs e)
  
      {
  
          string cmdString =  "c:\ffmpeg\bin";
  
          ProcessStartInfo startInfo = new ProcessStartInfo();
  
          startInfo.CreateNoWindow = false;
  
          startInfo.UseShellExecute = false;
  
          startInfo.FileName = "ffmpeg.exe";
  
          startInfo.WindowStyle = ProcessWindowStyle.Hidden;
  
          startInfo.Arguments =  cmdString + $"-i shatner.mp4 shatner.avi";
  
  
  
  
  
          using (Process exeProcess = Process.Start(startInfo))
  
          {
  
              exeProcess.WaitForExit();
  
          }
  
      }
  
  }

  }

  The error I am getting :
  "The system cannot find the specified file"

  Also I would have put a try catch block around the Process.Start but it doesnt matter since it is still throwing the exception.