31 lines
489 B
Bash
31 lines
489 B
Bash
|
#!/bin/bash
|
||
|
|
|
||
|
|
set -euo pipefail
|
||
|
|
|
||
|
|
function msg {
|
||
|
|
echo "${@}" >&2
|
||
|
|
}
|
||
|
|
|
||
|
|
function die {
|
||
|
|
msg "${@}"
|
||
|
|
exit 1
|
||
|
|
}
|
||
|
|
|
||
|
|
if [[ $# -ne 3 ]]; then
|
||
|
|
die "usage: ${0} <input> <output> <offset>"
|
||
|
|
fi
|
||
|
|
|
||
|
|
input="${1}"
|
||
|
|
output="${2}"
|
||
|
|
offset="${3}"
|
||
|
|
|
||
|
|
if [[ ! -f "${input}" ]]; then
|
||
|
|
die "input file ${input} does not exist"
|
||
|
|
fi
|
||
|
|
|
||
|
|
if [[ -e "${output}" ]]; then
|
||
|
|
die "output file ${output} already exists"
|
||
|
|
fi
|
||
|
|
|
||
|
|
ffmpeg -i "${input}" -itsoffset "${offset}" -i "${input}" -map 1:v -map 0:a -c copy "${output}"
|