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• Subtitles won't show on video after burning [closed]

  9 octobre 2023, par dra

  I'm trying to burn subtitles into a video using ffmpeg js and ffmpeg wasm in my NextJS app.
the issue is, after running the subtitles just won't show.
my code is as follows

  


  await ffmpeg.exec([
    '-i',
    `${fileName}`,
    '-vf',
    "subtitles=subtitles.srt:force_style='Fontname=Helvetica,PrimaryColour=&HFF00'",
    `${fileName}_final.mp4`,
])


  


  from the terminal it works as expected

  


  tried to run it on .srt and .ass files too, with and without font specification for both file types

  


• FFMPEG show encoding progress

  18 janvier 2016, par Mick Jack

  I am using ffmpeg to convert a video file large files take a long time to get encode. i will like to show a progress bar with a percentage/time remaining

  i saw and tried this example example but progress bar is not showing

  FFMPEG script and autorefresh both in upload.php

      <?php
  
  shell_exec("C:\\ffmpeg\\bin\\ffmpeg.exe -y -i ".$target_file." -c:v libx264 -s:v 854x480 -c:a copy \"{$newFileName}\" > logfile.txt 2>&1");
  
  
  
           ?>
  
  
  
          <code class="echappe-js">&lt;script src=&quot;https://code.jquery.com/jquery-2.1.1.min.js&quot; type=&quot;text/javascript&quot;&gt;&lt;/script&gt;
          
  &lt;script&gt;<br />
  
          $(document).ready(function(){<br />
  
          setInterval(function(){<br />
  
          $(&quot;#screen&quot;).load('progress.php')<br />
  
          }, 10000);<br />
  
          });<br />
  
          &lt;/script&gt;
  
  

  Progress.php

  <?php
  
  
  
  $content = @file_get_contents('logfile.txt');
  
  
  
              if($content){
  
              //get duration of source
  
              preg_match("/Duration: (.*?), start:/", $content, $matches);
  
  
  
              $rawDuration = $matches[1];
  
  
  
              //rawDuration is in 00:00:00.00 format. This converts it to seconds.
  
              $ar = array_reverse(explode(":", $rawDuration));
  
              $duration = floatval($ar[0]);
  
              if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
  
              if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;
  
  
  
              //get the time in the file that is already encoded
  
              preg_match_all("/time=(.*?) bitrate/", $content, $matches);
  
  
  
              $rawTime = array_pop($matches);
  
  
  
              //this is needed if there is more than one match
  
              if (is_array($rawTime)){$rawTime = array_pop($rawTime);}
  
  
  
              //rawTime is in 00:00:00.00 format. This converts it to seconds.
  
              $ar = array_reverse(explode(":", $rawTime));
  
              $time = floatval($ar[0]);
  
              if (!empty($ar[1])) $time += intval($ar[1]) * 60;
  
              if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;
  
  
  
              //calculate the progress
  
              $progress = round(($time/$duration) * 100);
  
  
  
              echo "Duration: " . $duration . "<br />";
  
              echo "Current Time: " . $time . "<br />";
  
              echo "Progress: " . $progress . "%";
  
  
  
  }
  
  
  
  ?>

  ffmpeg

   shell_exec("C:\\ffmpeg\\bin\\ffmpeg.exe -y -i ".$target_file." -c:v libx264 -s:v 854x480 -c:a copy \"{$newFileName}\" > logfile.txt 2>&1");

• FFMPEG : Position images in video when creating slide show

  29 décembre 2015, par Jimmy

  I’m using FFMPEG shell utility in an Android app to convert users pictures to video, here’s an example command :

  cat *.jpg | ffmpeg -f image2pipe -r 10  -vcodec mjpeg -i - -vcodec libx264 -s 1280x720 -preset ultrafast slideshow.mp4 

  I used to crop images when the user import it in the app but now I would like to allow the user to reposition the image later, here’s an example :

  

  So the user could drag or zoom the image to position it in the clear area (video ratio).

  So using the ffmpeg shell command can I specify the image coordinate for each image and position the image in the video.