blackatends

#!/bin/bash
# blackatends
# Accepts one or many video files as an input and determines how many frames of black are at the beginning and at the end
scriptdir=$(dirname "${0}")
. "${scriptdir}/mmfunctions" || { echo "Missing '${scriptdir}/mmfunctions'. Exiting." ; exit 1 ;};
version=1.0

cleanup(){
    _log -a "Process aborted"
    exit 1
}

trap cleanup SIGHUP SIGINT SIGTERM

usage(){
    echo
    echo "$(basename "${0}") ${version}"
    echo "This program will report on the number of black frames at the beginning and end of a video file."
    echo
    echo "Usage: $(basename $0) file1 [ file2 ... ]"
    echo
    echo "Options:"
    echo "  -h display this help"
    echo
    exit
}
[ "$#" = 0 ] && usage

# command-line options to set mediaid and original variables
OPTIND=1
while getopts ":h" opt; do
    case "$opt" in
        h) usage ;;
        \?) echo "Invalid option: -$OPTARG" ; exit 1 ;;
        :) echo "Option -$OPTARG requires an argument" ; exit 1 ;;
    esac
done
shift $(( ${OPTIND} - 1 ))

while [ "${*}" != "" ] ; do
    _log -b
    [ "$#" != 0 ] && sourcefile="${1}"
    black_at_ends "$sourcefile"
    _log -e
    shift
done