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• FFMpeg converts locally but not on Ubuntu production server

  1er janvier 2016, par LargeTuna

  I am using ffmpeg & this command to convert a .mov to .mp4. It works locally but it will not work on the production server.

   Command: /path/to/ffmpeg inputFile.MOV -vcodec libx264 -pix_fmt yuv420p -profile:v baseline -preset slow -crf 22 -movflags +faststart outputFile.mp4

  I have checked to see that ffmpeg is installed on the Ubuntu 14.04.x prod server...

   /usr/bin/ffmpeg

  I get this error each time :

  libavutil      55. 11.100 / 55. 11.100
  
  libavcodec     57. 20.100 / 57. 20.100
  
  libavformat    57. 20.100 / 57. 20.100
  
  libavdevice    57.  0.100 / 57.  0.100
  
  libavfilter     6. 21.101 /  6. 21.101
  
  libavresample   3.  0.  0 /  3.  0.  0
  
  libswscale      4.  0.100 /  4.  0.100
  
  libswresample   2.  0.101 /  2.  0.101
  
  libpostproc    54.  0.100 / 54.  0.100
  
  Output #0, mov, to 'inputFile.MOV':
  
  Output file #0 does not contain any stream

  Thoughts ?

• How to stream cv2.VideoWriter frames to and RTSP server

  10 juin 2022, par chasez0r

  Environment : Docker, Ubuntu 20.04, OpenCV 3.5.4, FFmpeg 4.2.4

  


  Im currently reading the output of a cv2.VideoCapture session using the CV_FFMPEG backend and successfully writing that back out in real time to a file using cv2.VideoWriter. The reason I am doing this is to drawing bounding boxes on the input and saving it to a new output.

  


  The problem is I am doing this in a headless environment (Docker container). And I’d like to view what's being written to cv2.VideoWriter in realtime.

  


  I know there are ways to pass my display through using XQuartz for example so I could use cv2.imshow. But what I really want to do is write those frames to an RTSP Server. So not only my host can "watch" but also other hosts could watch too.

  


  After the video is released I can easily stream the video to my RTSP Server using this command.

  


  ffmpeg -re -stream_loop -1 -i output.mp4 -c copy -f rtsp rtsp://rtsp_server_host:8554/stream

  


  Is there anyway to pipe the frames as they come in to the above command ? Can cv2.VideoWriter itself write frames to an RTSP Server ?

  


  Any ideas would be much appreciated ! Thank you.

  


• How to run FFMPEG at my web host server

  26 avril 2013, par user1978421

  I want to perform some video process at my web host server. I don't think the web host server will allow me to execute an exe file for security reasons.

  Should I use SharpFFMpeg ?

  I have downloaded SharpFFMpeg. But it's lacking a proper documentation.

  Can someone give one example how to perform a conversion from one video format to another ?

  I have written my execution program, but the compiler says it cannot file the file specified. What's wrong with it ?

          string command = @"D:\Recorded TV\ffmpeg.exe -i ""Australia's Toughest Police_QUEST_2013_04_17_21_57_00.wtv"" -s 800x400 throughCS.mp4";
  
          try
  
          {
  
              ProcessStartInfo psi = new ProcessStartInfo("\"" + command + "\"");
  
              psi.RedirectStandardOutput = true;
  
              psi.UseShellExecute = false;
  
              psi.CreateNoWindow = true;
  
              Process proc = new Process();
  
              proc.StartInfo = psi;
  
              proc.Start();
  
              string result = proc.StandardOutput.ReadToEnd();
  
              tb1.Text = result;
  
              Debug.WriteLine(result);
  
          }