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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


  


• Live streaming webvtt subtitles with HLS protocol

  5 mai, par Victor Ruiz

  I need a tool to generate HLS subtitles in live mode. Specifically, I want to create an HTTP server that serves .m3u8 and .webvtt files which are continuously updated over time.
Such HLS stream could be consumed via HTTP requests by HLS JS/ffplay multimedia players.

  


  The .webvtt files will be generated by an automatic transcriber, so the program must update the .m3u8 playlist accordingly whenever a new subtitle is produced.

  


  I only want to stream subtitle channels—no audio. The video channel can simply display a black chroma background.

  


  I attempted to use FFmpeg with a Linux pipe as input for the streaming .webvtt subtitles, along with a video file for the video stream. The output .webvtt and .m3u8 files were written to a folder and served via an NGINX server. However, FFmpeg fails after it reads the initial content of the .webvtt input from the pipe. If I inject more content afterward, it gets skipped.

  


  How can I achieve HLS subtitle streaming in live mode ? Can FFmpeg be used for this purpose, or do I need a different tool ?

  


• Upload a LIVE HLS output from FFMPEG to Amazon S3 bucket

  22 janvier 2023, par Pit Digger

  I have an ffmpeg command that outputs live hls stream from a vod file to local disk. I would like to upload the HLS chunks and manifest file in real time to Amazon S3 Bucket. Is it possible to upload it directly from memory ?

  


  Here is the ffmpeg command

  


  ffmpeg -stream_loop -1 -re -i bunny_1080p_30fps.mp4 -c:v libx264 \
-x264opts keyint=30:min-keyint=30:scenecut=-1 -tune zerolatency -s 1280x720 \
-b:v 1400k -bufsize 1400k -hls_start_number_source epoch -f hls stream.m3u8


  


  Note that I have checked all questions here but none of them do that for a live stream and for multiple files output like hls or dash stream.

  


  One option that I have tried is using node-watch module and upload file on change notification, but that does introduce some buffering. But if there was any better option. https://github.com/yuanchuan/node-watch