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• Framerate live streaming webm with dash and ffmpeg

  14 mai 2016, par Jones

  I am streaming a live video with ffmpeg and dash.js using
  these instructions. It works well except that the video is playing at a too high framerate. No framerate is specified in the manifest.
  Creating the Chunks :

  SET VP9_LIVE_PARAMS=-speed 6 -threads 8 -static-thresh 0 -max-intra-rate 300 -deadline realtime -lag-in-frames 0 -error-resilient 1
  
  ffmpeg -re -r 25 -i tcp://localhost:8891 ^
  
  -map 0:0 ^
  
    -pix_fmt yuv420p ^
  
    -c:v libvpx-vp9 ^
  
      -s 800x600 -keyint_min 25 -g 25 %VP9_LIVE_PARAMS% ^
  
      -f webm_chunk ^
  
      -header "webm_live/glass_360.hdr" ^
  
      -chunk_start_index 1 ^
  
    webm_live\glass_360_%%d.chk ^

  Creating the Manifest :

  ffmpeg ^
  
    -f webm_dash_manifest -live 1 ^
  
     -r 25 ^
  
    -i webm_live/glass_360.hdr ^
  
    -c copy ^
  
    -map 0 ^
  
    -r 25 ^
  
    -framerate 25 ^
  
    -f webm_dash_manifest -live 1 ^
  
      -adaptation_sets "id=0,streams=0" ^
  
      -chunk_start_index 1 ^
  
      -chunk_duration_ms 1000 ^
  
      -time_shift_buffer_depth 7200 ^
  
      -minimum_update_period 7200 ^
  
    webm_live/glass_live_manifest.mpd

  Manifest :

  <?xml version="1.0" encoding="UTF-8"?>
  
  <mpd xmlns="urn:mpeg:DASH:schema:MPD:2011" type="dynamic" minbuffertime="PT1S" profiles="urn:mpeg:dash:profile:isoff-live:2011" availabilitystarttime="2016-03-30T13:02:53Z" timeshiftbufferdepth="PT7200S" minimumupdateperiod="PT7200S">
  
  <period start="PT0S">
  
  <adaptationset mimetype="video/webm" codecs="vp9" bitstreamswitching="true" subsegmentalignment="true" subsegmentstartswithsap="1">
  
  <contentcomponent type="video"></contentcomponent>
  
  <segmenttemplate timescale="1000" duration="1000" media="glass_$RepresentationID$_$Number$.chk" startnumber="1" initialization="glass_$RepresentationID$.hdr"></segmenttemplate>
  
  <representation bandwidth="1000000" width="800" height="600" codecs="vp9" mimetype="video/webm" startswithsap="1"></representation>
  
  </adaptationset>
  
  </period>
  
  </mpd>

  Any Ideas how to fix this ?

• Get frame from live video stream

  10 avril 2013, par rickster

  I am streaming live video from my camera on my android phone to my computer using the MediaRecorder class.

  recorder.setCamera(mCamera);
  
  recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
  
  recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);          
  
  recorder.setOutputFile(uav_UDP_Client.pfd.getFileDescriptor());                     
  
  recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);

  That's the basic idea. So I would like to show this stream in real time. My plan is to use FFMpeg to turn the latest frame into a .bmp and show the .bmp on my C# program every time there is a new frame.

  The problem is there is no header until I stop the recording. So I can not use FFMpeg unless there is a header. I've looked at spydroid and using RTP but I do not want to use this method for various reasons.

  Any ideas on how I can do this easily ?

• Update .m3u8 playlist while live streaming

  28 juillet 2022, par Juan Trejos

  Im using nginx-rtmp-module to create a RTMP server and I'm using hls directives to create the playlist.

  


  hls on;
hls_path /var/www/html/cam/;
hls_fragment 10;
hls_nested on;
hls_playlist_length 7d;
hls_cleanup off;
hls_continuous on;
hls_fragment_naming system;


  


  Now, I want to update manually the .m3u8 playlist file from this :

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-TARGETDURATION:12
#EXTINF:10.000,
1658833177814.ts
#EXTINF:10.000,
1658833187826.ts
#EXTINF:10.000,
1658833197826.ts


  


  to this, when the streaming is "on line" :

  


  #EXTM3U
#EXT-X-VERSION:3  
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-TARGETDURATION:12
#EXTINF:10.000,
1658833197826.ts


  


  if I do it when there is no live streaming, that works, but if i do it when there is a live streaming, the .m3u8 file becames as the original after the server finish the creation of the last chunk. Even if i delete the .m3u8 file, it is recreated as the original one.

  


  I've also tryed it using ffmpeg instead of hls directives without success, and looked this solution but 😥😥