目的，将/live/xxx.m3u8路径转为 /hls/xxx/playlist.m3u8

location ~ /live/ {
    rewrite "^\/live\/(.).m3u8$" /hls/$1/playlist.m3u8 break; 
    rewrite "^\/live\/(.)-(.*).ts$" /hls/$1/$1-$2.ts break;
    proxy_pass http://localhost:9000;
    break;
}