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• Live Video Encoding and Streaming on a Webpage

  15 juin 2018, par Ockhius

  I am trying to show live webcam video stream on webpage and I have a working draft. However, I am not satisfied with the performance and looking for a better way to do the job.

  I have a webcam connected to Raspberry PI and a web server which is a simple python-Flask server. Webcam images are captured by using OpenCV and formatted as JPEG. Later, those JPEGs are sent to one of the server’s UDP ports. What I did up to this point is something like a homemade MJPEG(motion-jpeg) streaming.

  At the server-side I have a simple python script that continuously reads UDP port and put JPEG image in the HTML5 canvas. That is fast enough to create a perception of a live stream.

  Problems :

  • This compress the video very little. Actually it does not compress the video. It only decreases the size of a frame by formatting as JPEG.

  • FPS is low and also quality of the stream is not that good.

  • It is not a major point for now but UDP is not a secure way to stream video.

  • Server is busy with image picking from UDP. Needs threaded server design.

  Alternatives :

  • I have used FFMPEG before to convert video formats and also stream pre-recorded video. I guess, it is possible to encode(let say H.264) and stream WebCam live video using ffmpeg or avconv. (Encoding)

  Is this applicable on Raspberry PI ?

  • VLC is able to play live videos streamed on network. (Stream)

  Is there any Media Player to embed on HTML/Javascript to handle
  network stream like the VLC does ?

  • I have read about HLS (HTTP Live Stream) and MPEG-DASH.

  Does these apply for this case ? If it does,how should I use them ?

  Is there any other way to show live stream on webpage ?

  • RTSP is a secure protocol.

  What is the best practice for transport layer protocol in video
  streaming ?

• Running Live streaming of local user using ffmpeg at Web plateform

  23 décembre 2019, par Sneha Makwana

  I am using below command to stream my live desktop screen.

  ffmpeg -f x11grab -r 1 -loglevel panic -s `xdpyinfo | grep 'dimensions:'|awk '{print $2}'` -i $DISPLAY -qscale 0 -f mpegts udp://192.168.3.151:1111

  udp ://192.168.3.151:1111 - this is my streaming URL

  I can see live streaming in the parole media player (in Linux platform), but I can’t see this in a cross-network (i.e from windows PC - in the same network)

  Is there any web platform so I can see my streaming from anywhere (either windows or linux) just using unique streaming URL or do I need to change my streaming command or method ?

  Any help is much appreciated

• matroskadec : Add support for parsing live header files

  1er avril 2015, par Vignesh Venkatasubramanian

  matroskadec : Add support for parsing live header files
  This patch adds support for parsing live files (produced by
  
   f webm_chunk) which contains only the headers but no packets. This
  
  is only used when using -f webm_dash_manifest. There will be a
  
  follow up patch which adds live support to WebM DASH Manifest
  
  muxer.
  Signed-off-by : Vignesh Venkatasubramanian <vigneshv@google.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/matroskadec.c