ffmpeg -re -i {$pathFileName} -c:a aac  -b:a 128k -c:v libx264 -vf scale=-2:360 -g 48 -keyint_min 48  -sc_threshold 0 -bf 3 -b_strategy 2 -b:v 800k -maxrate 856k -bufsize 1200k -f hls -hls_time 6 -hls_list_size 0 -hls_key_info_file {$destinationFile}keyinfo {$destinationFile}low/index.m3u8 -c:a aac  -b:a 128k -c:v libx264 -vf scale=-2:540 -g 48 -keyint_min 48 -sc_threshold 0 -bf 3 -b_strategy 2 -b:v 1400k -maxrate 1498k -bufsize 2100k -f hls -hls_time 6 -hls_list_size 0 -hls_key_info_file {$destinationFile}keyinfo {$destinationFile}sd/index.m3u8 -c:a aac  -b:a 128k -c:v libx264 -vf scale=-2:720 -g 48 -keyint_min 48 -sc_threshold 0 -bf 3 -b_strategy 2 -b:v 2800k -maxrate 2996k -bufsize 4200k -f hls -hls_time 6 -hls_list_size 0 -hls_key_info_file {$destinationFile}keyinfo {$destinationFile}hd/index.m3u8