makeprestarget

#!/bin/bash
# makeprestarget, makes a file according to the video preservation master specifications listed at http://calpreservation.org/wp-content/uploads/2013/10/CAVPPTargetAudioandVideo-Specs2013_IMLS.pdf as of March 10, 2014
version="1.0"
scriptname=$(basename $(which "$0"))
scriptdir=$(dirname $(which "$0"))
. "$scriptdir/cavpperfunctions" || { echo "Missing '$scriptdir/cavpperfunctions'. Exiting." ; exit 1 ;};
dependencies=(ffmpeg ffprobe)
default_input_framerate=18
extension="_prsv"
_initialize_make

usage(){
    echo
    echo "$(basename ${0}) ${version}"
    echo "This application will create a prores/quicktime file (suitable for editing) from a video file or package input with the following options. By default the output will be written to ${outputdir}. You can override this with the -o option."
    echo "Dependencies: ${dependencies[@]}"
    echo "Usage: $(basename $0) [ -o /directory/to/write/to/ ] fileorpackage1 [ fileorpackage2 ...]"
    echo "  -p ( use prores for the output video codec instead of defaults )"
    echo "  -c ( crop out the center 960x720 of the input video, this is intended to process certain film scans )"
    echo "  -r framerate ( specify a framerate to interpret to input, used only for dpx and bmp image sequences. If not declared the script will use $default_input_framerate fps as a default )"
    echo "  -d directory ( directory to deliver the resulting file to )"
    echo "  -o directory ( directory to write the resulting file to )"
    echo "  -n (dry-run mode, show the commands that would be run but don't do anything)"
    echo "  -e emailaddress ( send an email about the delivery, only valid if -d is used )"
    echo "  -E emailaddress ( send an email about process outcome )"
    echo "  -h ( display this help )"
    echo
    echo "  Examples:"
    echo "  To read a series of BMP files as 24 frames per second and convert to default settings"
    echo "      ${scriptname} -r 24 100001.BMP"
    echo
    echo "  To transcode a batch of files to the default settings but use the prores video codec"
    echo "      ${scriptname} -p firstfile.avi secondfile.mov thirdfile.mkv"
    echo
    exit
}
[ "${#}" = 0 ] && usage

# command-line options to set mediaid and original variables
OPTIND=1
while getopts ":pcr:o:d:e:E:nh" opt ; do
    case "${opt}" in
        p) prores="Y" ;;
        c) crop="Y" ;;
        r) inputframerate="$OPTARG" ;;
        o) outputdir_forced="$OPTARG" && _check_outputdir_forced ;;
        d) deliverdir="$OPTARG" && check_deliverdir ;;
        e) emailaddress_delivery="$OPTARG" && check_emailaddress "${emailaddress_delivery}" ;;
        E) emailaddress_outcome="$OPTARG" && check_emailaddress "${emailaddress_outcome}" ;;
        n) DRYRUN=true;;
        h) usage ;;
        *) echo "bad option -$OPTARG" ; usage ;;
        :) echo "Option -$OPTARG requires an argument" ; exit 1 ;;
    esac
done
shift $(( ${OPTIND} - 1 ))

while [ "${*}" != "" ] ; do
    input="$1"
    if [[ ! "${outputdir}" ]] ; then
        outputdir="$(dirname "$input")/$(basename $0)" # default output directory, override with -o
    fi
    # get context about the input
    if [ -z "${outputdir_forced}" ] ; then
        [ -d "${input}" ] && { outputdir="${input}/transcoded" && logdir="${input}/logs" ;};
        [ -f "${input}" ] && { outputdir=$(dirname "${input}")"/transcoded" && logdir="$(dirname "${input}")/logs" ;};
        [ ! "${outputdir}" ] && { outputdir="${input}/transcoded" && logdir="${input}/logs" ;};
    else
        outputdir="${outputdir_forced}"
        logdir="${outputdir}/logs"
    fi
    _find_input "${input}"
    mediaid=$(basename "${input}" | cut -d. -f1)

    # set up output
    _log -b
    if [[ "${prores}" == "Y" ]] ; then
        extension="${extension}_prores"
    fi
    if [[ "${crop}" == "Y" ]] ; then
        croppingprocess="crop=960:720,"
        extension="${extension}_cropped"
    else
        croppingprocess=""
    fi
    output="${outputdir}/${mediaid%.*}${extension}.mov"
    [ -s "${output}" ] && { report -wt "WARNING ${output} already exists, skipping transcode" ; shift ; continue ;};
    _run mkdir -p "${outputdir}"

    # clear local arrays
    unset inputoptions
    unset middleoptions
    
    get_videocodecname "${input}"
    get_videostreamcount "${input}"
    get_audiostreamcount "${input}"

    # encoding options
    if [[ "${VIDEOCODECNAME}" == "bmp" || "${VIDEOCODECNAME}" == "dpx" ]] ; then
        inputoptions+=(-f image2)
        if [[ "${inputframerate}" ]] ; then
            inputoptions+=(-r:v "${inputframerate}")
        else
            inputoptions+=(-r:v 18)             # otherwise set to a default input frame rate
        fi
        start_number=$(basename "$sourcefile" | grep -o '[0-9]\{6\}')
        inputoptions+=(-start_number "${start_number}")
        sourcefile=$(echo "$sourcefile" | sed "s/${start_number}/%06d/")
    fi
    if [[ "${VIDEOSTREAMCOUNT}" > 0 ]] ; then
        middleoptions+=(-map 0:v)               # process all video streams of the input
        if [[ "${prores}" == "Y" ]] ; then
            middleoptions+=(-c:v prores)        # force video codec to prores (10 bit 4:2:2)
        else
            middleoptions+=(-c:v v210)          # force video codec to v210 (10 bit 4:2:2 uncompressed)
        fi
        middleoptions+=(-r:v ntsc)              # force NSTC frame rate
        middleoptions+=(-vf "${croppingprocess}scale=720:486:interl=1,setdar=4/3")  # scale to 720x486 with interlace awareness and set display aspect ratio to 4/3
    fi
    if [[ "${AUDIOSTREAMCOUNT}" > 0 ]] ; then
        middleoptions+=(-map 0:a)               # process all audio streams of the input
        middleoptions+=(-c:a pcm_s24le)         # force audio codec to pcm_s24le (uncompressed signed, 24 bit little endian, audio samples)
        middleoptions+=(-ac 2)                  # force audio to 2 channel configuration
        middleoptions+=(-ar 48k)                # force audio to 48kHz sampling rate
    fi
    middleoptions+=(-f mov)                     # force quicktime format

    _prep_ffmpeg_log
    _run ffmpeg ${inputoptions[@]} -i "${sourcefile}" ${middleoptions[@]} "${output}"
    echo
    _summarize_make
    _deliver_output
    shift
    _log -e
done