javicle/bin/jtrim

#!/bin/bash
#
# Trim a media file
#
# Usage:
#
#    jtrim in-file out-file [start] [end]
#
# in-file  : file to trim
# out-file : write trimmed file here
# start    : seconds to trim from the beginning. if omitted, default value is start of the file
# end      : retain the file until this number of seconds. if omitted, default is to end of file
#
SCRIPT="${0}"
SCRIPT_DIR="$(cd "$(dirname "${SCRIPT}")" && pwd)"
. "${SCRIPT_DIR}"/jvcl_common

IN_FILE="${1?no in-file provided}"
OUT_FILE="${2?no out-file provided}"
T_START="${3}"
T_END="${4}"
echo "
{
  \"assets\": [
    { \"name\": \"input\", \"path\": \"${IN_FILE}\" }
  ],
  \"operations\": [
    {
      \"operation\": \"trim\",
      \"creates\": {
        \"name\": \"trimmed\",
        \"dest\": \"${OUT_FILE}\"
      },
      \"perform\": {
        \"trim\": \"input\",
        \"start\": \"${T_START}s\",
        \"end\": \"${T_END}s\"
      }
    }
  ]
}
" | "${SCRIPT_DIR}"/jvcl