你能教我吗？这意味着nginx视频点播模块位置~^/p/\d+/（sp/\d+；/）？serveFlavor/

我正在学习nginx视频点播模块，但我不理解这个意思“~^/p/\d+/（sp/\d+/）？serveFlavor/” 如果你明白这个意思，请教我

location ~ ^/p/\d+/(sp/\d+/)?serveFlavor/ {
        vod hls;
        
        add_header Access-Control-Allow-Headers '*';
        add_header Access-Control-Expose-Headers 'Server,range,Content-Length,Content-Range';
        add_header Access-Control-Allow-Methods 'GET, HEAD, OPTIONS';
        add_header Access-Control-Allow-Origin '*';
        expires 100d;
    }