82 lines
1.3 KiB
Bash
82 lines
1.3 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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usage() {
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cat >&2 <<'EOF'
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Usage:
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frame.sh <video-file> [--time HH:MM:SS] [--index N] --out /path/to/frame.jpg
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Examples:
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frame.sh video.mp4 --out /tmp/frame.jpg
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frame.sh video.mp4 --time 00:00:10 --out /tmp/frame-10s.jpg
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frame.sh video.mp4 --index 0 --out /tmp/frame0.png
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EOF
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exit 2
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}
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if [[ "${1:-}" == "" || "${1:-}" == "-h" || "${1:-}" == "--help" ]]; then
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usage
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fi
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in="${1:-}"
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shift || true
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time=""
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index=""
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out=""
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--time)
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time="${2:-}"
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shift 2
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;;
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--index)
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index="${2:-}"
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shift 2
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;;
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--out)
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out="${2:-}"
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shift 2
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;;
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*)
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echo "Unknown arg: $1" >&2
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usage
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;;
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esac
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done
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if [[ ! -f "$in" ]]; then
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echo "File not found: $in" >&2
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exit 1
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fi
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if [[ "$out" == "" ]]; then
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echo "Missing --out" >&2
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usage
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fi
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mkdir -p "$(dirname "$out")"
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if [[ "$index" != "" ]]; then
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ffmpeg -hide_banner -loglevel error -y \
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-i "$in" \
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-vf "select=eq(n\\,${index})" \
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-vframes 1 \
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"$out"
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elif [[ "$time" != "" ]]; then
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ffmpeg -hide_banner -loglevel error -y \
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-ss "$time" \
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-i "$in" \
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-frames:v 1 \
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"$out"
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else
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ffmpeg -hide_banner -loglevel error -y \
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-i "$in" \
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-vf "select=eq(n\\,0)" \
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-vframes 1 \
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"$out"
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fi
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echo "$out"
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