ffmpeg-download-m3u8

#!/bin/bash
set -euo pipefail

usage() {
    cat >&2 <<EOM
$(basename "$0") M3U8_URL OUTPUT_MP4

Arguments:

    M3U8_URL    URL or file path to .m3u8 index file.
    OUTPUT_MP4  Output filename.

For example:

    $(basename "$0") https://example.com/foo.m3u8 out.mp4

EOM
}

if [ $# -ne 2 ]; then
    usage
    exit 1
fi

if [[ $1 != http* ]] && [ -e "$1" ]; then
    # allow downloading internet files from .m3u8 files on disk
    protocol_whitelist="-protocol_whitelist file,http,https,tcp,tls,crypto"
else
    protocol_whitelist=""
fi

set -x
ffmpeg -hide_banner -loglevel info \
    $protocol_whitelist -i "$1" -c copy -bsf:a aac_adtstoasc "$2"