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• PHP Ajax XMLHttpRequest popen live progress

  21 février 2016, par John R

  I’m trying to output live : the ffmpeg progress

  It works great when I execute the php file alone : many lines with text appearing one after an other...

  ••• But when it’s a XMLHttpRequest context, the output is 1 line empty

  PHP working when not in AJAX situation :

  ini_set("output_buffering", "0");
  
  ob_implicit_flush(true);
  
  $call_mp4 = ' __FFMPEG Command HERE__ ';
  
  $proc = popen($call_mp4, 'r');
  
  while (!feof($proc)) {
  
      echo '['.date("i:s")."] ".fread($proc, 4096).'<br />';ob_flush();flush();
  
  }

  Does someone know why in AJAX it’s blank and only 1 line ?
  how can this be fixed ?

  Regards

• Working example on live streaming using FFMPEG+MP4Box+Dash.js

  27 février 2017, par BartMao

  I’m stucked on this issue for a couple of days, couldn’t find a perfect working example.

  Here’s my current method :

  Step 1.

  ffmpeg -re -i sample.mp4 -threads 0 -y \
  
  -map 0:1 -vn -acodec aac -strict -2 -ar 48000 -ac 2 \
  
  -f segment -segment_time 4 -segment_format mpegts Dash\audio_%d.ts \
  
  -map 0:0 -vcodec libx264 -vprofile baseline -preset veryfast \
  
  -s 640x360 -vb 512k -bufsize 1024k -maxrate 512k -level 31 -keyint_min 25 -g 25 \
  
  -sc_threshold 0 -an -bsf h264_mp4toannexb -flags -global_header \
  
  -f segment -segment_time 4 -segment_format mpegts Dash\video_%d.ts

  Step 2.

  mp4box -add Dash\audio_%d.ts Output\audio_%d.ts.mp4
  
  mp4box -add Dash\video_%d.ts Output\video_%d.ts.mp4

  Step 3.

  mp4box -dash-ctx Output\dash-live.txt -dash 4000 \
  
  -rap -ast-offset 12 -no-frags-default -bs-switching no \
  
  -min-buffer 4000 -url-template -time-shift 1800 \
  
  -segment-name live_$RepresentationID$_ -out Output\live \
  
  -dynamic -mpd-refresh 2 -subsegs-per-sidx -1 Output\audio_%d.ts.mp4:id=audio Output\video_%d.ts.mp4:id=video

  I played the live.mpd generated using Dash.js, the player paused a long time before actually playing, and freeze every time getting a new m4s file.

  Are there any wrong on my commands ? Or it would be great if can provide any other good examples.

• ffmpeg live stream recording stops on stream interrupt

  3 septembre 2018, par Anton Antonov

  I have to record live stream with ffmmpeg. It is easy. Here is my command line :

  ffmpeg -i /source/address> -s 320x240 -r 25 -c:v libx264 -g 125 -vb 300000 -maxrate 400000 -bufsize 600000 -profile:v baseline -deinterlace -preset veryfast -ac 2 -ar 48000 -c:a libfdk_aac -b:a 64000 -f mp4 to/dst/file>

  But my task is to make ffmpeg to stop and exit when live stream is stopped.

  Is there easy way to do this ?