This script generates HLS streaming files with variant playlist and alternate audio. Uses mediafilesegmenter and variantplaylistcreator

mediafilesegmenter.sh

#!/bin/sh

usage()
{
cat << EOF
usage: $0 options

This script generates HLs streaming files with variant playlist and alternate audio. 

OPTIONS:
-h      Show this message
-u      The absolute base url ie http://domain.com/hls/.
-s      The basename for the segment files.
-b      The list of bitrates ie "200 400 600 1000".
-d      The target duration. defaults to 10.
-f      The file base path.
-i      The video input file prefix ie /src/path/bigbuckbunny_{bitrate}k.mp4.
-I      The video input file for audio only prefix ie /src/path/bigbuckbunny_{lang}_{bitrate}k.mp4.
-p      The index name.
-P      The main playlist index name.
-a      A a list of bitrates for audio only streams ie "200 400"
EOF
}

(( $# )) || usage

BASE_URL=
SEGMENT_BASENAME=
FILENAME_PREFIX=
AUDIO_FILENAME_PREFIX=
BITRATES=
AUDIO_BITRATES=
TARGET_DURATION=10
FILE_PATH=
AUDIO_FILE_PATH=
INDEX_NAME=
DST_DIR="."
ALT_AUDIO=
PLAYLIST_ARGS=
LANGUAGES=
LANGUAGE_LABELS=
MAIN_INDEX_NAME="main_all.m3u8"



while getopts “hi:u:s:b:d:f:F:I:l:L:p:P:o:a:” OPTION
do
    case $OPTION in
        h)
            usage
            exit 1
            ;;
        u)
            BASE_URL=" -b $OPTARG"
            ;;
        s)
            SEGMENT_BASENAME=" -B $OPTARG"
            ;;
        b)
            BITRATES=$OPTARG
            ;;
        d)
            TARGET_DURATION=$OPTARG
            ;;
        f)
            FILE_PATH=" -f $OPTARG"
            ;;
        F)
            AUDIO_FILE_PATH=" -f $OPTARG"
            ;;
        i)
            FILENAME_PREFIX="$OPTARG"
            ;;
        I)
            AUDIO_FILENAME_PREFIX="$OPTARG"
            ;;
        p)
            INDEX_NAME=" -i $OPTARG.m3u8"
            ;;
        P)
            MAIN_INDEX_NAME="$OPTARG.m3u8"
            ;;
        o)
            DST_DIR=$OPTARG
            ;;
        a)
            AUDIO_BITRATES=$OPTARG
            ;;
        l)
            LANGUAGES=$OPTARG
            ;;
        L)
            LANGUAGE_LABELS=($OPTARG)
            ;;
        ?)
            usage
            exit
            ;;
    esac
done

cd $DST_DIR

SRC_PATH=$(dirname "$FILENAME_PREFIX");


PLAYLIST_URL=

i=0;
## get video streams with bitrates
for BITRATE in $BITRATES
do

## format the segment path with index or bitrate
BITRATE_FILE_PATH=${FILE_PATH/{index\}/${i}};
BITRATE_FILE_PATH=${BITRATE_FILE_PATH/{bitrate\}/${BITRATE}};

## format the source fileame with bitrate
BITRATE_FILE_NAME=${FILENAME_PREFIX/{bitrate\}/${BITRATE}};

## format the playlist index name with index or bitrate
INDEX_NAME_ARG=${INDEX_NAME/{index\}/${i}};
INDEX_NAME_ARG=${INDEX_NAME/{bitrate\}/${BITRATE}000};
INDEX_NAME_FILE=${INDEX_NAME_ARG/ -i /""};

BITRATE_FILE_DIR=${BITRATE_FILE_PATH/ -f /""};

## format the segment name
SEGMENT_BASENAME_ARG=${SEGMENT_BASENAME/{bitrate\}/${BITRATE}000};

PLAYLIST_URL=
PLAYLIST_FILE="${BITRATE_FILE_NAME%.*}.plist"


if [ -n "${BASE_URL}" ]; then
    PLAYLIST_URL="${BASE_URL}/";
    #replace extra end slash if needed
    PLAYLIST_URL=${BASE_URL/\w\/\//\/};
fi

if [ -n ${BITRATE_FILE_DIR} ]; then
    if [ ! -d ${BITRATE_FILE_DIR} ]; then
        mkdir ${BITRATE_FILE_DIR};
    fi

    PLAYLIST_URL+="${BITRATE_FILE_DIR}/";
fi

PLAYLIST_URL+=${INDEX_NAME_FILE}



PLAYLIST_ARGS+="${PLAYLIST_URL} ${PLAYLIST_FILE} "

echo "Creating segments for bitrate ${BITRATE} from file ${BITRATE_FILE_NAME}"

#echo "-I --quiet -z none -t ${TARGET_DURATION} ${BASE_URL} ${SEGMENT_BASENAME_ARG} ${INDEX_NAME_ARG} ${BITRATE_FILE_PATH} ${BITRATE_FILE_NAME}"

mediafilesegmenter -I --quiet -z none -t ${TARGET_DURATION} ${BASE_URL} ${SEGMENT_BASENAME_ARG} ${INDEX_NAME_ARG} ${BITRATE_FILE_PATH} "${BITRATE_FILE_NAME}" > /dev/null 2>&1

((i = i + 1))
done

AUDIO_MEDIA=

## get audio only streams for different languages
i=0;

## get available audio bitrates for different languages
for BITRATE in $AUDIO_BITRATES
do

lang=0;

## get different languages
for LANGUAGE in $LANGUAGES
do

## format the segment path with language
BITRATE_FILE_PATH=${AUDIO_FILE_PATH/{index\}/${i}};
BITRATE_FILE_PATH=${BITRATE_FILE_PATH/{bitrate\}/${BITRATE}};
BITRATE_FILE_PATH=${BITRATE_FILE_PATH/{lang\}/${LANGUAGE}};

BITRATE_FILE_DIR=${BITRATE_FILE_PATH/ -f /""};


## format the playlist index name with index or bitrate
INDEX_NAME_ARG=${INDEX_NAME/{index\}/${i}};
INDEX_NAME_ARG=${INDEX_NAME/{bitrate\}/${BITRATE}000};
INDEX_NAME_FILE=${INDEX_NAME_ARG/ -i /""};

## format the source fileame with bitrate and language
BITRATE_FILE_NAME=${AUDIO_FILENAME_PREFIX/{bitrate\}/${BITRATE}};
#BITRATE_FILE_NAME=${BITRATE_FILE_NAME/{lang\}/${LANGUAGE}};
BITRATE_FILE_NAME=${BITRATE_FILE_NAME/{lang\}/${LANGUAGE}};
## format the segment name
SEGMENT_BASENAME_ARG=${SEGMENT_BASENAME/{bitrate\}/${BITRATE}000};

if [ -n ${BITRATE_FILE_DIR} ]; then
    if [ ! -d ${BITRATE_FILE_DIR} ]; then
        mkdir ${BITRATE_FILE_DIR};
    fi
fi

AUDIO_MEDIA+="#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=\"audio-${BITRATE}\",URI=\"${PLAYLIST_URL}\",LANGUAGE=\"${LANGUAGE}\",NAME=\"${LANGUAGE_LABELS[${lang}]}\"\n"

echo "Creating segments for alternative audio with bitrate ${BITRATE} from file ${BITRATE_FILE_NAME} and language ${LANGUAGE}"

#echo "--quiet -z none -a -t ${TARGET_DURATION} ${BASE_URL} ${SEGMENT_BASENAME_ARG} ${INDEX_NAME_ARG} ${BITRATE_FILE_PATH} ${BITRATE_FILE_NAME}"
mediafilesegmenter --quiet -z none -a -t ${TARGET_DURATION} ${BASE_URL} ${SEGMENT_BASENAME_ARG} ${INDEX_NAME_ARG} ${BITRATE_FILE_PATH} "${BITRATE_FILE_NAME}" > /dev/null 2>&1
((lang = lang + 1))
done
((i = i + 1))
done

echo "Creating variant playlist ${MAIN_INDEX_NAME}"

variantplaylistcreator -resolution-tags -o ${MAIN_INDEX_NAME} $PLAYLIST_ARGS


if [ -n ${AUDIO_MEDIA} ]; then
 echo "Adding alternate audio files to variant playlist ${MAIN_INDEX_NAME}"
 PLAYLIST=`tail -n +2 ${MAIN_INDEX_NAME}`
 PLAYLIST="#EXTM3U\n$AUDIO_MEDIA\n${PLAYLIST}"
 echo "${PLAYLIST}" > ${MAIN_INDEX_NAME}
fi