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• FFmpeg droplet on Windows (converting EXR sequences to mp4)

  6 mars 2018, par KnK

  I’m trying to create a little droplet on my desktop in windows10 that creates mp4 files out of exr sequences. My idea would be to drag the first frame of the sequence and the droplet would recognize the sequence and cook a nice mp4 video out of it.

  My source sequence usually look like this :
  render.0001.exr
  render.0002.exr
  render.0003.exr
  etc.

  So far I’m doing this completely manually by typing this to a command line :

  ffmpeg.exe -gamma 2.2 -i render.%04d.exr -q:v 0 -r 25 video.mp4

  This command creates a nice quality gamma 2.2 mp4 which is perfect but manually setting it is obviously a hassle.

  After a little google-ing I’ve found this droplet :

  ffmpeg.exe -i %1 -y %~n1_preview.mp4

  Which is brilliant but doesn’t recognize file sequences so if I drop multiple files on it it will create single frame mp4 files. I guess it is missing the %04d but I have no idea where to put it or whether it needs some other parameter to work properly.

  Do you guys and girls have any idea how to format this droplet properly ? It would be a huge timesaver.

  Thanks in advance !

• Saving frames from multiple videos in a specific location using openCV/ffmpeg and Python

  15 janvier 2019, par Sparkiepandas

  I am trying to extract and save the first frame from multiple videos in a specific folder. For now I got the extraction part working but my saving is in BGR instead of the preferred RGB (if I am right).Although, the frames are shown in my notebook as RGB but not as BGR. Also I need to add some variable filename,because at the moment it saves the frames but keeps overwriting the same frame. Can you guys help me with the two specific problems ? This is what I got so far :

  SOLVED : I got the saving working, output file and colouring

  img_rows,img_cols=200,200 
  
  
  
  listing = os.listdir(r'C:\Users/Me\SVWnew\archery\train')
  
  
  
  # Create a counter
  
  counter = 0
  
  for vid in listing:
  
      vid = r"C:/Users/Me/SVWnew/archery/train/"+vid
  
      cap = cv2.VideoCapture(vid)
  
  
  
      for k in range(1):
  
          ret, frame = cap.read()
  
          rgb =cv2.resize(frame,(img_rows,img_cols))
  
          plt.imshow(rgb)
  
          plt.xticks([]), plt.yticks([])  
  
          plt.show()
  
          pathOut = r"C:/Users/Me/SVWnew - Copy/archery/train"
  
          cv2.imwrite(pathOut + "/frame%d.jpg" % counter, rgb) 
  
          counter += 1
  
          if cv2.waitKey(1) & 0xFF == ord('q'):
  
              break
  
  
  
      cap.release()
  
      cv2.destroyAllWindows()

• Nginx allow only my domain to access a video url

  4 septembre 2019, par Bruno F

  i’m setting up a web server that contains live video streaming embed into the html5 video tag. My workflow is to grab the rtsp video from an ip camera, decode it to a HLS format using ffmpeg and send the video to my server.
  Nginx allows access to the video through a url, which I put in my video tag as a source.

  Everything works perfectly, the only problem is that anyone can access the URL of the video and put that URL on their website without my permission.

  Is there any way to only allow my domain to access, and block for example www.domain2.com to put it into their video tag or other framework thath they use ? i’m think Nginx can do the job maybe.

  Here are the codes of Nginx and my html in case is needed.

  HTML :

  <video class="video-js vjs-default-skin vjs-big-play-centered vjs-fluid" controls="controls" preload="none">
  
  <source src="//mydomain.com/live/stream.m3u8" type="application/x-mpegURL"></source>
  
  </video>

  Nginx :

  location /live {
  
              types {
  
                      application/vnd.apple.mpegurl m3u8;
  
              }
  
              limit_conn addr 5;
  
              alias /home/stream;
  
              add_header Cache-Control no-cache;
  
              add_header 'Access-Control-Allow-Origin' '*';
  
      }

  Many thanks guys !