Generate playlist from files recursive - php

Question

I have multiple folders with small videos and i need to make a rss feed from them.
Structure of the files is like this:
MainFolder ->
-> File.Summer-> file.summer.p01f1.mp4, file.summer.p01f2.mp4......,file.summer.p02f1.mp4 ,file.summer.p02f2.mp4.... and so on.
-> File.Winter-> file.winter.p01f1.mp4, file.winter.p01f2.mp4......,file.winter.p02f1.mp4,file.winter.p02f2.mp4.... and so on.
What i need is a solution to generate those rss creating a feed like file.summer.p01.rss and the content is all the files containing p01f1, p01f2 then next to file.summer.p02.rss. In all the folders in the path.
I found a solution which makes a single rss with all the files in the folder but i need the rss to be split in parts matching the file names.
It can be a windows bat or a php script.
Thank you.
this is the script i have now:
$list="file.summer";
$part="01";
$ser_dir = 'c:\www\php\movs\\'.$list;
$rss_head = '<rss version="2.0">';
$movs_path="../php/movs/";
$iosser = "/iosser/";
$file_out = $ser_dir."\\".$list.".p".$part.".rss";
$xml = $rss_head. "\n";
$xml .="<channel>"."\n";
foreach (glob($ser_dir."\*.p".$part."*.srt" ,GLOB_NOSORT) as $filename) {
$xml .="<item>". "\n";
$xml .= "<title>".basename($filename, ".srt")."</title>\n";
$filename=basename($filename);
$xml .= "<image>".$movs_path.$list."/".substr($filename, 0,-7).".jpg</image>\n";
$xml .= '<source file="'.$iosser.$list."/".basename($filename,".srt").'.mov"/>'."\n";
$xml .="</item>". "\n";
}
$xml .="</channel>"."\n";
$xml .= "</rss>";
file_put_contents($file_out,$xml);
echo $list ."\n";
echo $part;