$HOME/ffmpeg-local/ffmpeg \
    -fflags nobuffer \
    -rtsp_transport tcp \
    -i rtsp://192.168.0.83:8554/unicast \
    -preset ultrafast \
    -c:v copy \
    -an \
    -flags +cgop \
    -g 30 \
    -hls_flags delete_segments \
    ./test.m3u8