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