Download an M3U8 video stream and output it as an MKV using ffmpeg

download_m3u8.sh

#!/usr/bin/env bash
if [ "$#" -ne 2 ] ; then
    echo "USAGE: $0 <m3u8_url> <out_file>"; exit
fi
base=$(echo "$1" | rev | cut -d'/' -f2- | rev)
curl -s $1 | grep -v "^#" | sed -e "s>^>$base/>" | xargs curl -s | ffmpeg -i pipe:0 -c:v copy -c:a copy $2