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• Video decoding by the online player [closed]

  10 janvier 2024, par rahkarenovin

  I encoded my videos with 32-bit ffmpeg.

  


  I want the video player to decode and then display the video when the user buys it.

  


  My problem :
I don't know how to decode the video so that the player can display it

  


  My player code :

  


  <div class="grid">&#xA;    <main>&#xA;        <div>&#xA;            &#xA;            &#xA;        </div>&#xA;    </main>&#xA;</div>&#xA;&#xA;<code class="echappe-js">&lt;script&amp;#xA;    type=&quot;text/javascript&quot;&amp;#xA;    src=&quot;https://cdn.polyfill.io/v2/polyfill.min.js?features=es6,Array.prototype.includes,CustomEvent,Object.entries,Object.values,Math.trunc&quot;&amp;#xA;    crossorigin=&quot;anonymous&quot;&amp;#xA;&gt;&lt;/script&gt;&#xA;&#xA;&lt;script type=&quot;text/javascript&quot; src=&quot;https://cdn.plyr.io/3.5.2/plyr.js&quot;&gt;&lt;/script&gt;&#xA;&#xA;&lt;script type=&quot;text/javascript&quot; src=&quot;https://cdn.jsdelivr.net/npm/hls.js@latest&quot;&gt;&lt;/script&gt;&#xA;&#xA;&lt;script&gt;&amp;#xA;    const source = &amp;#x27;https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8&amp;#x27;;&amp;#xA;    const player = new Plyr(&amp;#x27;#player&amp;#x27;);&amp;#xA;    var video = document.getElementById(&amp;#x27;player&amp;#x27;);&amp;#xA;    if(Hls.isSupported()) {&amp;#xA;       var hls = new Hls();&amp;#xA;       hls.loadSource(source);&amp;#xA;       hls.attachMedia(video);&amp;#xA;       hls.on(Hls.Events.MANIFEST_PARSED,function() {&amp;#xA;           video.play();&amp;#xA;        });&amp;#xA;    }else if (video.canPlayType(&amp;#x27;application/vnd.apple.mpegurl&amp;#x27;)) {&amp;#xA;       video.src = source;&amp;#xA;       video.addEventListener(&amp;#x27;loadedmetadata&amp;#x27;,function() {&amp;#xA;           video.play();&amp;#xA;        });&amp;#xA;    }&amp;#xA;&lt;/script&gt;&#xA;

  


• Quickly extract multiple frames from multiple videos

  11 mai 2019, par Werner Lehmann

  I have a folder with videos files and need to extract 2+ frames from each of these, using a bash script on Linux. Currently I am doing this for each video file in a loop :

  ffmpeg -nostdin -loglevel fatal -ss 15 -i "${filename}" -frames:v 1 "${out1}"
  
  ffmpeg -nostdin -loglevel fatal -sseof -15 -i "${filename}" -frames:v 1 "${out2}"

  This extracts a frame 15s in and another frame 15s from the end. For N video files I need 2N ffmpeg calls. I experimented with -vf select, as was asked here, but this was much slower, especially with the requirement to select frames from the beginning and from the end. Also, I am already using GNU parallel which makes a big difference.

  Performance is actually not too bad. But my question is, can this be improved further ? I am hoping for a way to

  • to extract both frames in one ffmpeg call (faster than two separate calls), or
  • to feed ffmpeg more than one file per call (to reduce process startup overhead)

• ffmpeg same input as output file (temporary file needed but how ?)

  7 janvier 2021, par tomato planet

  I don't know much about .bat files or ffmpeg and spent the last hour on the internet searching how I can solve my problem, but didn't find anything.
I want to make .bat file which removes the audio of a video and replaces it with the no-audio version. I already made a folder with my .bat file and ffmpeg and added an option to the context menu to open my .bat file.

  


  That's my .bat file currently :

  


  ffmpeg -i %1 -an -vcodec copy %1


  


  But ffmpeg can't overwrite the file it's currently reading. It would be great if somebody helps me how to create a temporary file without the audio, and then replace the input file with the temporary one.

  


  Thanks a lot in advance !