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• nginx live adaptive bitrate streaming :- not able to switch quality manuallly ?

  15 juin 2021, par Ashad Nasim

  I am using Nginx for live adaptive bitrate streaming. My live streaming is working fine.
Also, the chunks are getting created and the master playlist is also getting created as you can see in this image.

  


  My config

  


  
        application live {
            live on; # Allows live input

            
            exec_push  /usr/bin/ffmpeg -i rtmp://localhost:1935/$app/$name
                    -force_key_frames "expr:gte(t,n_forced*3)" -c:v libx264 -vprofile baseline -vlevel 3.1 -s 640x360  -b:v 1200k  -strict -2   -c:a aac -ar 44100 -ac 2 -b:a 96k  -f flv rtmp://localhost/show/$name_hi
                -force_key_frames "expr:gte(t,n_forced*3)" -c:v libx264 -vprofile baseline -vlevel 3.1 -s 240x360  -b:v 1200k  -strict -2   -c:a aac -ar 44100 -ac 2 -b:a 96k  -f flv rtmp://localhost/show/$name_low;

                
        }





  


  This is my master playlist


  


  This is my each playlist m3u8 file


  


  But when I point the master playlist to the videojs (hlsjs) added it is showing the quality

  


  

  1. auto

  


  2. undefinedp

  


  


  But when I use some other test stream from online then it is showing me all available quality

  


  using my live stream generated using nginx ffmpeg
  

  

  


  

  


  using other live stream


  


• Creating a live, updating video stream with ffmpeg

  15 avril 2020, par MattJHoughton

  I've set up a data stream from my webcam using the MediaSource api and set it to send data from my webcam in webm format, every 4 seconds. I then grab that on a node server, use createWriteStream to set up a pipe and start streaming !

  



  I'm stuck at converting the media from webm to a live m3u8. Below is the ffmpeg command I'm running (It's been through numerous iterations as I've tried things from the docs).

  



  const cmd = `ffmpeg
    -i ${filepath}
    -profile:v baseline
    -level 3.0
    -s 640x360 -start_number 0
    -hls_time 10
    -hls_list_size 0
    -hls_flags append_list
    -hls_playlist_type event
    -f hls ${directory}playlist.m3u8`

  const ls = exec(cmd.replace(/(\r\n|\n|\r)/gm," "), (err, stdout, stderr) => {
    if(err) {
      console.log(error);
    }

  })


  



  I can't remove the #EXT-X-ENDLIST at the end of the playlist, to keep the stream live for my web players, so when I hit play - the video plays the playlist in its current state and stops at the end.

  



  Thanks

  



  UPDATE

  



  This may be a quality/speed issue. When I reduced the quality down to ;

  



  const cmd = `ffmpeg
    -i ${filepath}
    -vf scale=w=640:h=360:force_original_aspect_ratio=decrease
    -profile:v main
    -crf 51
    -g 48 -keyint_min 48
    -sc_threshold 0
    -hls_time 4
    -hls_playlist_type event
    -hls_segment_filename ${directory}720p_%03d.ts
    ${directory}playlist.m3u8


  



  I was able to get a pixelated live video. However, it quickly crashed... Maybe this is not possible in Node/Web Browsers yet ?

  


• How to play live h264 stream with python [closed]

  27 juillet 2020, par vkh53121Acuoly.com

  I have a socket that listen to h264 stream, I can save this stream to file and play it with ffplay.

  


  This not rtp/rtsp that wraps h264 .that only h264.

  


  I want to watch this stream live, not save to file and after that run ffplay.

  


  How can I do that with python,so that work on windows and linux