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• Can ffmpeg periodically report statistics on a real-time audio stream (rather than file) ?

  19 janvier 2016, par Caius Jard

  I currently use ffmpeg to capture desktop screen and audio that the computer speakers are playing, something like a screencast. ffmpeg is started by an app that captures its console output, so I can have that app read the output and look for info

  I’d like to know if there are a set of switches I can supply to ffmpeg whereby it will periodically output some audio statistics that will directly report, or allow me to infer, that the audio stream has gone silent ?

  I see some audio statistics switches/filters but the help docs for these seem to imply they will collect their stats over the processing of an entire stream and then report them at the end.. I’d prefer something like "the average audio volume over the past 5 seconds" reported every 5 seconds. I could even deduce from the audio bitrate of the encoder I think, if it’s VBR and the rate consistently falls because it’s encoding nothing

• Revision 63c5bf2b9c : Fix Tsan errors This patch fixed 2 reported Tsan errors while running VP9 real-

  15 avril 2015, par Yunqing Wang

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encodeframe.h

  
   Modify /vp9/encoder/vp9_encoder.c

  
   Modify /vp9/encoder/vp9_pickmode.c

  
  
  Fix Tsan errors

  This patch fixed 2 reported Tsan errors while running VP9 real-time
  encoder.

  Change-Id : Ib0278fe802852862c3ce87c4a500e544d7089f67

• ffmpeg Windows stream desktop real time to web

  14 avril 2019, par ilapasle

  Hello i want to stream my Windows desktop in realtime with ffmpeg

  for capture desktop i use this code :

  ffmpeg.exe -f gdigrab -framerate 60 -i desktop output.mkv

  it’s work

  Now i not want to record video of my desktop but stream my desktop and view this in web browser.
  i need to export stream video in m3u8 file

  i have use this code :

  ffmpeg.exe -f gdigrab -framerate 60 -i desktop -c:v libx264 -crf 18 -maxrate 400k -bufsize 1835k -pix_fmt yuv420p -hls_time 10 -hls_wrap 6 output.m3u8

  in my current dir i have 6 ts file and output.m3u8 but i can not open output.m3u8 file, the file is empty why ?

  i want to read this file in web browser like this code :

      
  
  
  
  
  
  
  
  <div>
  
  <video autoplay="true" controls="controls" width="640" height="480">
  
  <source src="output.m3u8" type="application/x-mpegURL"></source>
  
  Your browser does not support HTML5 streaming!
  
  </video>
  
  </div>

  thanks for advance for your help