batch-video-convert.php

<?php

function convertfilename($filename) {
    $filename = str_replace([ "?", "[", "]", "/", "\\", "=", "<", ">", 
                              ":", ";", ",", "'", '"', "&", "$", "#", 
                              "*", "(", ")", "|", "~" ], "", $filename);
    $filename = preg_replace("/[\s-]+/", "-", $filename);
    $filename = trim($filename, ".-_");
    return ucwords($filename);
  }

function convert($id,$start,$end,$uid){
    $id = preg_replace("/\?share.*/","",$id);
    $uid = str_replace('==','',$uid);
    $tool = 'ffmpeg -hide_banner -loglevel error ';
    $yt = "https://www.youtube.com/watch?v=";

    $cmd = "yt-dlp --print filename '$yt$id'";
    $name = exec($cmd);
    $name = preg_replace("/\..*$/",".mp4",$name);

    $dirname = convertfilename(str_replace('.mp4','',$name)).'---'.$uid;
    $name = convertfilename($name);
    mkdir($dirname);
    chdir($dirname);

    echo "\n\n*** Getting ".$name." *** \n\n";
    $cmd = "yt-dlp --output '$name' --merge-output-format mp4 '$yt$id'";
    $x = exec($cmd);

    $cmd = "ffprobe -v error -select_streams v -show_entries stream=width,height -of csv=p=0:s=x '$name'";
    $size = exec($cmd);
    echo '*'.$size.'*'."\n";
    $small = strstr($size, '1280') ? '-small' : '';
    $intro = "../Intro$small.mp4";
    $outro = "../Outro$small.mp4";

    echo "\n\n*** Getting clip from $start to $end *** \n\n";
    $chunkname = preg_replace("/\.mp4$/","-clip.mp4",$name);
    $cmd = $tool."-ss $start -to $end -i '$name' -c copy '$chunkname'";
    exec($cmd);

    echo "\n\n*** Adding intro and outro *** \n\n";
    $introname = str_replace('-clip.mp4','---'.$uid.'.mp4',$chunkname);
    $cmd = $tool.'-i "'.$intro.'" -i "'.$chunkname.'" -i "'.$outro.'" -filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a] concat=n=3:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" "'.$introname.'"';
    exec($cmd);
    unlink($chunkname);

    echo "*** Extracting audio from ".$name." *** \n";
    $cmd = $tool."-i '$introname' -vn -acodec copy '".str_replace(".mp4",".m4a",$introname)."'";
    exec($cmd);
    chdir('..');
}

$timings = file_get_contents('timings.tsv');
$lines = explode("\n",$timings);
// $lines = array_slice($lines,16,1);
foreach($lines as $i=>$l){
    echo ($i+1)." of ".sizeof($lines)."\n";
    $chunks = explode("\t",$l);
    $id = $chunks[6];
    $start = '0'.$chunks[1];
    $end = '0'.$chunks[2];
    $uid = $chunks[7];
    echo $chunks[3]."\n";
    echo ($id.'-'.$start.'-'.$end.'-'.$uid)."\n";
    convert($id,$start,$end,$uid);
}



?>