ffmpeg command to product segmented variant m3u8 playlist

segment_variant.sh

#!/bin/bash
basename=/mnt/warehouse/grouch_core/live/grouch_ramdisk
mkdir -p $basename/$1
(
cd $basename/$1
/usr/local/bin/ffmpeg -i rtmp://172.16.1.14/publish/$1 \
    -acodec copy \
    -f segment \
    -flags -global_header \
    -map 0 \
    -vbsf h264_mp4toannexb \
    -segment_wrap 10 \
    -segment_format mpegts \
    -segment_list_flags +live \
    -segment_list_type m3u8 \
    -segment_list live.m3u8 \
    -vcodec libx264 \
    -b:v 2M \
    -segment_list $1.2M.m3u8 \
    $1-%03d.2M.ts \
    \
    -b:v 1M \
    -segment_list $1.1M.m3u8 \
    $1-%03d.1M.ts \
    \
    -b:v 500k \
    -segment_list $1.500k.m3u8 \
    $1-%03d.500k.ts \
    \
    -b:v 250k \
    -segment_list $1.250k.m3u8 \
    $1-%03d.250k.ts
)