PHP uses ffmpeg to add text subtitles to videos

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

The details are 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); 
} 
?>

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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