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• How do I access / stream an IP Camera (RTSP, ONVIF) from iOS using Swift

  24 avril 2015, par European

  I am a beginning Swift programmer with no Objective-C experience. I would like to create a UIView subclass which displays a video stream from an IP camera (RTSP, ONVIF).

  It looks like I will need to use the ffmpeg library http://sourceforge.net/projects/ffmpeg-ios/

  I did find one ffmpeg tutorial in Japanese ;-) http://qiita.com/tottokotkd/items/d9d376d5993961627aec

  Does anyone know of a tutorial on streaming an IP camera using Swift ?

• pyav / ffmpeg / libav access side data without decoding the video

  19 juin 2021, par user1315621

  Right now I am accessing the motion vectors in the following way :

  


  container = av.open(
    rtsp_url, 'r',
    options={
        'rtsp_transport': 'tcp',
        'stimeout': '5000000',  
        'max_delay': '5000000', 
    }
)
stream = container.streams.video[0]
codec_context = stream.codec_context
codec_context.export_mvs = True


for packet in container.demux(video=0):
    for video_frame in packet.decode():
        motion_vectors_raw = video_frame.side_data.get('MOTION_VECTORS')


  


  It seems to me that this does decode the video_frame. Is there a way to obtain the motion vectors without having to decode the entire frame ? My goal is to reduce the CPU utilization.

  


• FFmpeg does not successfully send http request to server

  20 octobre 2019, par e-ly

  I’m trying to output data from ffmpeg to my webserver, but it simply does not work when I use my domain. It works as expected when I use localhost but not when I use my domain.

  I’ve tried multiple things such as changing from a subdomain to a subdirectory using nginx, and like I said— it works when I use localhost but not when I use my domain. When I ran -v trace the logs told me that the connection was successful but the server did not receive anything, yet when I visited the same url in my browser I got a response.

  ffmpeg command :

  '-v', 'trace',                                               
  
  '-f', 'x11grab',
  
  '-s', '720x480',
  
  '-r', '30',
  
  '-i', ':100',
  
  '-an',
  
  '-c:v', 'mpeg1video',
  
  '-q:v', '12',
  
  '-bf', '0',
  
  '-f', 'mpegts',
  
  'http://stream.domain.com/'                                                                                                    

  Nginx rule :

  server {
  
     listen 80;
  
     server_name stream.domain.com;
  
     location / {
  
         proxy_pass http://localhost:9000/;
  
     }
  
  }    

  Nodejs code :

  app.post('/', (req, res) => {
  
      console.log('Post received', req.url, req.ip)
  
      res.sendStatus(200)
  
  })

  I expect the console of the node process to let me know that a post has been received (for debugging purposes)
  Instead, nothing is received.
  However using http://localhost:9000/ instead of http://stream.domain.com/ works as expected