#!/bin/bash
#!/bin/bash
#
# Letterbox a video file
#
# Usage:
#
#    jletterbox in-file out-file width height [color]
#
# in-file  : file to trim
# out-file : write scaled file here
# width    : output width
# height   : output height
# color    : padding color, can be a hex value (0xff0000 is red), or a color
#            name from https://ffmpeg.org/ffmpeg-utils.html#color-syntax
#
SCRIPT="${0}"
SCRIPT_DIR="$(cd "$(dirname "${SCRIPT}")" && pwd)"
. "${SCRIPT_DIR}"/jvc_common

IN_FILE="${1?no in-file provided}"
OUT_FILE="${2?no out-file provided}"
WIDTH="${3}"
HEIGHT="${4}"
COLOR="${5:-black}"

echo "
{
  \"assets\": [
    { \"name\": \"input\", \"path\": \"${IN_FILE}\" }
  ],
  \"operations\": [
    {
      \"operation\": \"letterbox\",
      \"creates\": {
        \"name\": \"boxed\",
        \"dest\": \"${OUT_FILE}\"
      },
      \"source\": \"input\",
      \"width\": \"${WIDTH}\",
      \"height\": \"${HEIGHT}\",
      \"color\": \"${COLOR}\"
    }
  ]
}
" | "${SCRIPT_DIR}"/jvc ${JVC_OPTIONS}