ffmpeg dash low latency experiment

gistfile1.txt

ffmpeg -f flv -listen 1 -i rtmp://127.0.0.1:19350/live/app \
    -c:v libx264 -b:v:0 5000k -b:v:1 2000k  -crf 23 -g 120 -format_options "movflags=cmaf" -adaptation_sets "id=0,streams=v id=1,streams=a" \
    -frag_type duration -keyint_min 120 -maxrate 1M -bufsize 2M -force_key_frames "expr:gte(t,n_forced*4)" \
    -pix_fmt yuv420p -profile:v baseline -an -s 1280x720 \
    -ldash 1 -streaming 1 -use_template 1 -use_timeline 0 -seg_duration 4 -frag_duration 1 -frag_type duration \
    -utc_timing_url "http://time.akamai.com/?iso%26ms" -window_size 15 -extra_window_size 15 -remove_at_exit 1 -f dash ./ldash/1.mpd