This works in 2.3
ADD 1 STREAM C:/wamp/www/test/playlist.m3u8 -tune:v zerolatency -preset:v ultrafast -crf:v 25 -filter:v "scale=480:270,format=yuv420p,fps=25" -hls_time 10 -hls_list_size 6 -hls_wrap 10 -start_number 1 -ar:a 44100 -b:v 1000k -minrate:v 1000k -maxrate:v 1000k -bufsize:v 1000k -filter:a pan=stereo|c0=c0|c1=c1
However continous warning comes. To mute the warnings, send a command like
log level error