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• Trigger exec_pull on http connection

  29 octobre 2019, par M. Cole

  Is it possible to trigger exec_pull on http connection ? For example, I have the following Nginx configuration :

  server {
  
  
  
   listen 80;
  
  
  
  location /hls {
  
  
  
    types {
  
      application/vnd.apple.mpegurl m3u8;
  
      video/mp2t ts;
  
    }
  
  
  
                    root /mnt;
  
                    add_header Cache-Control no-cache;
  
                    index index.m3u8 index.ts;
  
                    add_header Access-Control-Allow-Origin *;
  
              }
  
          }
  
  
  
  }
  
  
  
  rtmp {
  
  
  
      server {
  
          listen 1935;
  
          allow play all;
  
  
  
  application hls {
  
  
  
  live on;
  
  exec_options on;
  
  
  
  exec_pull /usr/bin/ffmpeg -re -i http://example.com:333/293.m3u8 -c copy -f flv rtmp://localhost:1935/hls/$name;
  
  }
  
  
  
  application hls {
  
  
  
      live on;
  
      hls on;
  
      hls_path /mnt/hls;
  
      hls_fragment 3s;
  
  }
  
  
  
       }
  
    }

  I would like to have an exec_pull triggered on HLS http request.
  For example If I request http://my-serverip.com/hls/293.m3u8 then it should start ffmpeg to start creating hls files.

  I’ve been working on this for 5-6 days and could not figure out how to trigger exec_pull on http requests.

• Opencv 3.1 compiled with FFMPEG, but won't open https urls

  2 mars 2018, par stalagmite7

  I work on a 16.04 system, and have successfully installed opencv 3.1 with FFMPEG flags enabled. I double checked this was actually the case by cv2.getBuildInformation() and I got FFMPEG = YES.

  I am trying to open a video that is hostel on a private server by my workplace (I am logged in to the VPN, in case thats a concern) and I can access this video over the browser. But videocapture with cv2 fails.

  >>> cap = cv2.VideoCapture("https://xxx.mp4", cv2.CAP_ANY) #dummy url
  
  >>> cap
  
  <videocapture 0x7f63300fa4b0="0x7f63300fa4b0">
  
  >>> cap.isOpened()
  
  False
  
  </videocapture>

  This is always the case for https urls. It seems to be able to work with local videos just fine. I have tried a bunch of different thing : initially thought it was a gstreamer problem so I checked my plugins, had some gst-bad versions (ref : https://github.com/GStreamer/gst-plugins-ugly), removed those and replaced with good versions, no joy. Also tried to explicitly tell videoCapture to use cv2.CAP_ANY and cv2.CAP_FFMPEG flags while reading the video, still no luck.

  I disabled the Gstreamer flag while compiling opencv, but even with it set to ON, there was no difference in my problem.

  I haven’t been able to find a solution to this issue and have been looking and trying different things for days now ! Any ideas ?

• FFMPEG : Changing the filter prevents the video from being blurred

  11 juillet 2016, par Drupalist

  I am new to FFMPEG, it has been a few days I am working on it. I tried the code given at
  FFmpeg - Apply blur over face
  .I have a video with 208 X 208 resolution and I need to blur a rectangle on the video, with some width/height and top/left offset. The following codes successfully blur the video

  ffmpeg -i test1.mov -filter_complex "[0:v]crop=10:10:1:1,boxblur=1[b0];[0:v][b0]overlay=10:10" intro-blur.mov

  ffmpeg -i test1.mov -filter_complex "[0:v]crop=50:50:1:1,boxblur=1[b0];[0:v][b0]overlay=10:10" intro-blur.mov

  But the followings don’t

  ffmpeg -i test1.mov -filter_complex "[0:v]crop=5:5:1:1,boxblur=10[b0];[0:v][b0]overlay=10:10" intro-blur.mov

  ffmpeg -i test1.mov -filter_complex "[0:v]crop=10:10:1:1,boxblur=10[b0];[0:v][b0]overlay=10:10" intro-blur.mov

  ffmpeg -i test1.mov -filter_complex "[0:v]crop=20:20:1:1,boxblur=10[b0];[0:v][b0]overlay=10:10" intro-blur.mov

  I would like to know why it is so ? What is the problem with the codes that don’t work.

  Thanks in advance.