makegifsummary

#!/bin/bash
# makegifsummary
VERSION="1.0"
SCRIPTDIR=$(dirname $(which "${0}"))
. "${SCRIPTDIR}/mmfunctions" || { echo "Missing '${SCRIPTDIR}/mmfunctions'. Exiting." ; exit 1 ;};
DEPENDENCIES=(ffmpeg ffprobe)
_initialize_make
EXTENSION="gif"

# local variables
IMAGECOUNT=20

_usage(){
    echo
    echo "$(basename "${0}") ${VERSION}"
    echo "This application will make a gif as a visual representation of a video."
    echo "Dependencies: ${DEPENDENCIES[@]}"
    echo "Usage: $(basename ${0}) [ -d /path/to/deliver/to/ ] fileorpackage1 [ fileorpackage2 ...]"
    echo "  -d directory ( directory to deliver the resulting file to )"
    echo "  -o file or directory ( directory or filepath to write the resulting file to )"
    echo "  -n (dry-run mode, show the commands that would be run but don't do anything)"
    echo "  -h display this help"
    echo
    exit
}
[ "${#}" = 0 ] && _usage

user_input="${*}"
# command-line options to set mediaid and original variables
OPTIND=1
while getopts ":d:e:E:o:nh" OPT ; do
    case "${OPT}" in
        d) DELIVERDIR="${OPTARG}" && _check_deliverdir ;;
        e) EMAILADDRESS_DELIVERY="${OPTARG}" && check_emailaddress "${EMAILADDRESS_DELIVERY}" ;;
        E) EMAILADDRESS_OUTCOME="${OPTARG}" && check_emailaddress "${EMAILADDRESS_OUTCOME}" ;;
        o) OUTPUT_FORCED="${OPTARG}" ;;
        n) DRYRUN=true;;
        h) _usage ;;
        *) echo "bad option -${OPTARG}" ; _usage ;;
        :) echo "Option -${OPTARG} requires an argument" ; _writeerrorlog "makeframes" "The option selected required an argument and none was provided. The script had to exit." ; exit 1 ;;
    esac
done
shift $(( ${OPTIND} - 1 ))

while [ "${*}" != "" ] ; do
    INPUT="${1}"
    shift
    _unset_variables
    _find_input "${INPUT}"

    MEDIAID=$(basename "${INPUT}" | cut -d. -f1)

    if [[ -z "${OUTPUT_FORCED}" ]] ; then
        [ -d "${INPUT}" ] && { OUTPUTDIR="${INPUT}/objects/access/gif" && LOGDIR="${INPUT}/metadata/logs" ;};
        [ -f "${INPUT}" ] && { OUTPUTDIR=$(dirname "${INPUT}")"/access/gif" && LOGDIR="$(dirname "${INPUT}")/access/logs" ;};
        [ ! "$OUTPUTDIR" ] && { OUTPUTDIR="${INPUT}/objects/access/gif" && LOGDIR="${INPUT}/metadata/logs" ;};
        _set_up_output
    else
        if [[ -d "${OUTPUT_FORCED}" ]] ; then
            OUTPUTDIR="${OUTPUT_FORCED}"
            LOGDIR="${OUTPUT_FORCED}/logs"
            OUTPUTDIR_FORCED="${OUTPUT_FORCED}"
            _check_outputdir_forced
        else
            OUTPUTDIR="$(dirname "${OUTPUT_FORCED}")"
            OUTPUT="${OUTPUT_FORCED}"
            if [ -s "${OUTPUT}" ] ; then
                _report -wt "WARNING ${OUTPUT} already exists, skipping transcode"
                continue
            fi
        fi
    fi

    _report_to_db

    # encoding options
    _get_codectagstring "${SOURCEFILE}"
    _get_dar "${SOURCEFILE}"
    INPUTOPTIONS+=(-nostdin)
    if [[ "${CODEC_TAG_STRING}" == "mjp2" ]] ; then
         INPUTOPTIONS+=(-vcodec libopenjpeg)
    fi
    _add_video_filter "scale=320:320/(${DAR})"
    _add_video_filter "thumbnail=4"
    MIDDLEOPTIONS+=(-update 1 -frames:v 1)
    _filter_to_middle_option
    _log -b
    DURATION=$(ffprobe 2>/dev/null "${SOURCEFILE}" -show_format | grep duration | cut -d= -f2)
    _run_critical mkdir -p "${OUTPUTDIR}"
    TEMPIMAGES="$(_maketemp)"
    _prep_ffmpeg_log -q
    for (( IMAGENUMBER=1; IMAGENUMBER<=${IMAGECOUNT}; IMAGENUMBER++)) ; do
        START="0$(echo "scale=2; ( ${DURATION} / ( ${IMAGECOUNT} + 1 )) * ${IMAGENUMBER}" | bc)"
        SUFFIX="_${IMAGENUMBER}"
        _report -d "Making frame ${IMAGENUMBER} of ${IMAGECOUNT}  - dur:${DURATION} start:${START} - ${OUTPUT}"
        if [ "${CONCATSOURCE}" != "" ] ; then
            FFMPEGINPUT="${CONCATSOURCE}"
        fi
        _run_critical_event ffmpeg -nostdin -y ${INPUTOPTIONS[@]} -v warning -ss "$START" "${FFMPEGINPUT[@]}" "${MIDDLEOPTIONS[@]}" "${TEMPIMAGES}.${IMAGENUMBER}.png"
    done
    PALETTE="$(_maketemp)"
    ffmpeg -nostdin -f image2 -framerate 6 -i "${TEMPIMAGES}.%01d.png" -vf palettegen "${PALETTE}.png"
    ffmpeg -nostdin -f image2 -framerate 6 -i "${TEMPIMAGES}.%01d.png" -i "${PALETTE}.png" -filter_complex paletteuse "${OUTPUT}"
    echo
    if [ -d "${DELIVERDIR}" ] ; then
        _report -dt "Delivering output"
        _run mkdir -p "${DELIVERDIR}/${MEDIAID}_images/"
        _run cp -av "${OUTPUTDIR}/" "${DELIVERDIR}/${MEDIAID}_images/"
    fi
    _report -d "cleaning up temp files"
    rm -v "${TEMPIMAGES}."*".png"
    _log -e
done