How to use php to add subtitles to videos using ffmpeg

This article mainly introduces the method of using PHP to add subtitles to videos using ffmpeg. It analyzes the techniques of using PHP to add subtitles to videos using ffmpeg. It has certain reference value. Friends who need it can refer to it

This article describes how to add subtitles to videos using PHP using ffmpeg. The specific implementation method is as follows:

The code is as follows:

<?php
$dir = &#39;./&#39;; // set to current folder
if ($handle = opendir($dir)) {
 while(false!== ($file = readdir($handle))) {
 if ( is_file($dir.$file) ){
 if (preg_match("&#39;\.(avi)$&#39;", $file) ){
 $sub_file = str_ireplace(".avi", ".srt", $dir.$file);
 $idx_file = str_ireplace(".avi", ".idx", $dir.$file);
 $thumb_file = str_ireplace(".avi", ".jpg", $dir.$file);
 $out_file = str_ireplace(".avi", ".mp4", $dir.$file);
 flv_convert_get_thumb($dir.$file, $sub_file, $idx_file, $thumb_file, $out_file);
 }
 else{
 continue;
 }
 }
 }
 closedir($handle);
}
//flv_convert_get_thumb(&#39;input.avi&#39;, &#39;input.srt&#39;, &#39;output.jpg&#39;, &#39;output.ogm&#39;);
// code provided and updated by steve of phpsnaps ! thanks
// accepts:
// 1: the input video file
// 2: path to thumb jpg
// 3: path to transcoded mpeg?
function flv_convert_get_thumb($in, $in_sub, $in_idx, $out_thumb, $out_vid){
 // get thumbnail
 $cmd = &#39;ffmpeg -v 0 -y -i &#39;.$in.&#39; -vframes 1 -ss 250 -vcodec mjpeg -f rawvideo -s 286x160 -aspect 16:9 &#39;.$out_thumb;
 $res = shell_exec($cmd);
 // $res is the output of the command
 // transcode video
$cmd = &#39;mencoder &#39;.$in.&#39; -o &#39;.$out_vid.&#39; -sub &#39;.$in_sub.&#39; -subfont-text-scale 3.0 -subpos 99 -af volume=10 -aspect 16:9 -of avi -noodml -ovc x264 -x264encop$
 $res = shell_exec($cmd);
}
?>

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