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• FFMPEG HLS live stream doesn't include webvtt caption/subtitles

  1er février 2023, par Pit Digger

  I have following cmd that is generating a live stream from a vod file. I have webvtt file for the vod file. But when running following command it doesnt generated a fragmented webvtt.

  


  C:\projects\vod-as-live\tmp> ffmpeg -i c:/video_test/output_english.mp4 -i C:\VIDEO_TEST\subtitles_en.vtt -c copy -c:s webvtt -filter_complex "[0:v]split=3[v1][v2][v3]; [v1]copy[v1out]; [v2]scale=w=1280:h=720[v2out]; [v3]scale=w=640:h=360[v3out]" \
    -map [v1out] -c:v:0 libx264 -x264-params "nal-hrd=cbr:force-cfr=1" \
    -b:v:0 2M -maxrate:v:0 2M -minrate:v:0 2M -bufsize:v:0 10M -preset fast -g 48 -sc_threshold 0 -keyint_min 48 -map [v2out] -c:v:1 libx264 -x264-params "nal-hrd=cbr:force-cfr=1" \
    -b:v:1 1M -maxrate:v:1 1M -minrate:v:1 1M -bufsize:v:1 1M -preset fast -g 48 -sc_threshold 0 -keyint_min 48 -map [v3out] -c:v:2 libx264 -x264-params "nal-hrd=cbr:force-cfr=1" \
    -b:v:2 500K -maxrate:v:2 500K -minrate:v:2 500K -bufsize:v:2 500K -preset fast -g 48 -sc_threshold 0 -keyint_min 48 \
    -map a:0 -c:a:0 aac -b:a:0 96k -ac 2 -map a:0 -c:a:1 aac -b:a:1 96k -ac 2 -map a:0 -c:a:2 aac -b:a:2 48k -ac 2 \
    -f hls -hls_time 6 -hls_list_size 10 -hls_flags independent_segments -hls_segment_type mpegts -hls_segment_filename stream_%v_data%02d.ts -master_pl_name master.m3u8 -var_stream_map "v:0,a:0 v:1,a:1 v:2,a:2" stream_%v.m3u8


  


  If I try following link it works and I see a vtt playlist and related vtt fragments generated fine. https://ffmpeg.org/pipermail/ffmpeg-user/2016-October/034006.html

  


• ffmpeg channels don't work (PHP)

  15 avril 2016, par Y.Saad

  I have a lot of channels with " ffmpeg " (4 channels) that start automatically, I create a code for show the first channel and after 5 seconds show the second .. Etc All things as right but I have a small problem the seconds channel doesn’t start automatically, I need to make stop to the first channel

  Code for 4 channel work 100% but without function for show first channel and after 5 seconds show the second ... Etc

  <?php
  
  
  
  ffmpeg -i http://clay24.webhop.net:8000/live/mario/mario/13.ts -i http://clay24.webhop.net:8000/live/mario/mario/12.ts -i http://clay24.webhop.net:8000/live/mario/mario/10.ts -map 0 -c:a aac -b:a 64k -strict -2 -preset fast -crf 25 -vcodec libx264 -f flv rtmp://178.33.231.108:1989/mylive/1 -map 1 -c:a aac -b:a 64k -strict -2 -preset fast -crf 25 -vcodec libx264 -f flv rtmp://178.33.231.108:1989/mylive/21 -map 2 -c:a aac -b:a 64k -strict -2 -preset fast -crf 25 -vcodec libx264 -f flv rtmp://178.33.231.108:1989/mylive/24
  
  
  
  ?>

  the second code with functions

  <?php
  
  echo'
  
      <code class="echappe-js">&lt;script&gt;<br />
  
  <br />
  
                  window.addEventListener(&quot;load&quot;, function() {<br />
  
  <br />
  
  var urls = iframes = [ &quot;'; ffmpeg -i http://mygameravatar.zapto.org:43666/live/test1/test2/81.ts -c:a aac -b:a 64k -preset fast -crf 25 -vcodec libx264 -f flv rtmp://178.33.231.108:1989/mylive/2 <br />
  
          echo '];<br />
  
  <br />
  
  var iframes = document.querySelectorAll(&quot;div&quot;);<br />
  
  <br />
  
  var n = 0;<br />
  
  <br />
  
  var interval = setInterval(function() {<br />
  
    <br />
  
    iframes[++n].src = urls[n - 1];<br />
  
    iframes[n].style.display = &quot;block&quot;;<br />
  
    console.log(n);<br />
  
    if (n === iframes.length -1) {<br />
  
      clearInterval(interval);<br />
  
      console.log(&quot;all iframes loaded&quot;)<br />
  
    }<br />
  
    <br />
  
  }, 5000)<br />
  
  <br />
  
  })<br />
  
          &lt;/script&gt;
  
  	’ ;
  	ffmpeg -i http://mygameravatar.zapto.org:43666/live/test1/test2/297.ts -c:a aac -b:a 64k -preset fast -crf 25 -vcodec libx264 -f flv rtmp ://178.33.231.108:1989/mylive/1
  	echo ’
  
  ’ ;
  
   ?>
  

• scale a video to multiple qualities and add watermark

  8 mars 2019, par jared zek

  hello I have a ffmpeg command that scales a video to 2 different qualities and adds a watermark, the problem here is that the watermark is scaled along with the videos and it looks horrible

  D:\electron\brenda\node_modules\ffmpeg-static\bin\win32\x64\ffmpeg.exe -i C:\Users\Andy\Desktop\entrada\videoplayback.mp4 -i C:\Users\Andy\Desktop\entrada\marca.png -filter_complex [0:0]scale=854:480[wm]; [wm][1:0]overlay=x=0:y=0[out] -map [out] -map 0:a -movflags faststart -preset fast -y C:\Users\Andy\Desktop\salida/480_videoplayback.mp4 -filter_complex [0:0]scale=640:360[wm]; [wm][1:0]overlay=x=0:y=0[out] -map [out] -map 0:a -movflags faststart -preset fast -y C:\Users\Andy\Desktop\salida/360_videoplayback.mp4

  video scaled to 360 with watermark

  I want the watermark to remain in its original size and not escalate with the video, thank you for your help I’ve been here for hours