PHP 给视频增加字幕显示，使用ffmpeg

usage : copy code above into encoder.php place this file into your web server root directory, install all the requried tools needed to use ffmpeg-php now place some video.avi and video.srt or video.sub etc video.idx subtitle ,to encode video with srt visit your script http://yourip/encoder.php it should grab thumbnail then start the encoding job, refresh page and thats it

this encoding script has been tested on a bare bone VPS ubuntu 8.04 server with the following tools installed

Apache2
PHP5
Php-cli
ffmpeg-php
ffmpeg
mencoder

optional : mplayer - could be used instead of ffmpeg to grab thumbnails

1. $dir = './'; // set to current folder
2. if ($handle = opendir($dir)) {
3. while(false!== ($file = readdir($handle))) {
4. if ( is_file($dir.$file) ){
5. if (preg_match("'\.(avi)$'", $file) ){
6. $sub_file = str_ireplace(".avi", ".srt", $dir.$file);
7. $idx_file = str_ireplace(".avi", ".idx", $dir.$file);
8. $thumb_file = str_ireplace(".avi", ".jpg", $dir.$file);
9. $out_file = str_ireplace(".avi", ".mp4", $dir.$file);
10. flv_convert_get_thumb($dir.$file, $sub_file, $idx_file, $thumb_file, $out_file);
11. }
12. else{
13. continue;
14. }
15. }
16. }
17. closedir($handle);
18. }
20. //flv_convert_get_thumb('input.avi', 'input.srt', 'output.jpg', 'output.ogm');
21. // code provided and updated by steve of phpsnaps ! thanks
22. // accepts:
23. // 1: the input video file
24. // 2: path to thumb jpg
25. // 3: path to transcoded mpeg?
26. function flv_convert_get_thumb($in, $in_sub, $in_idx, $out_thumb, $out_vid){
27. // get thumbnail
28. $cmd = 'ffmpeg -v 0 -y -i '.$in.' -vframes 1 -ss 250 -vcodec mjpeg -f rawvideo -s 286x160 -aspect 16:9 '.$out_thumb;
29. $res = shell_exec($cmd);
30. // $res is the output of the command
31. // transcode video
32. $cmd = 'mencoder '.$in.' -o '.$out_vid.' -sub '.$in_sub.' -subfont-text-scale 3.0 -subpos 99 -af volume=10 -aspect 16:9 -of avi -noodml -ovc x264 -x264encop$
33. $res = shell_exec($cmd);
34. }
35. ?>

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