mirror of
https://github.com/ksyasuda/SubMiner.git
synced 2026-02-28 06:22:45 -08:00
88 lines
1.9 KiB
Bash
Executable File
88 lines
1.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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usage() {
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cat <<'EOF'
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Usage:
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scripts/mkv-to-readme-video.sh <input.mkv>
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Description:
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Generates two browser-friendly files next to the input file:
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- <name>.mp4 (H.264 + AAC, prefers NVIDIA GPU if available)
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- <name>.webm (AV1/VP9 + Opus, prefers NVIDIA GPU if available)
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EOF
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}
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if [[ "${1:-}" == "-h" || "${1:-}" == "--help" ]]; then
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usage
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exit 0
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fi
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if [[ $# -ne 1 ]]; then
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usage
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exit 1
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fi
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if ! command -v ffmpeg >/dev/null 2>&1; then
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echo "Error: ffmpeg is not installed or not in PATH." >&2
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exit 1
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fi
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input="$1"
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if [[ ! -f "$input" ]]; then
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echo "Error: input file not found: $input" >&2
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exit 1
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fi
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dir="$(dirname "$input")"
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filename="$(basename "$input")"
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base="${filename%.*}"
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mp4_out="$dir/$base.mp4"
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webm_out="$dir/$base.webm"
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has_encoder() {
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local encoder="$1"
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ffmpeg -hide_banner -encoders 2>/dev/null | grep -qE "[[:space:]]${encoder}[[:space:]]"
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}
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echo "Generating MP4: $mp4_out"
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if has_encoder "h264_nvenc"; then
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echo "Using GPU encoder for MP4: h264_nvenc"
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ffmpeg -y -i "$input" \
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-c:v h264_nvenc -preset p5 -cq 20 \
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-profile:v high -pix_fmt yuv420p \
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-movflags +faststart \
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-c:a aac -b:a 160k \
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"$mp4_out"
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else
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echo "Using CPU encoder for MP4: libx264"
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ffmpeg -y -i "$input" \
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-c:v libx264 -preset slow -crf 20 \
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-profile:v high -level 4.1 -pix_fmt yuv420p \
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-movflags +faststart \
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-c:a aac -b:a 160k \
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"$mp4_out"
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fi
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echo "Generating WebM: $webm_out"
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if has_encoder "av1_nvenc"; then
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echo "Using GPU encoder for WebM: av1_nvenc"
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ffmpeg -y -i "$input" \
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-c:v av1_nvenc -preset p5 -cq 30 -b:v 0 \
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-c:a libopus -b:a 128k \
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"$webm_out"
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else
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echo "Using CPU encoder for WebM: libvpx-vp9"
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ffmpeg -y -i "$input" \
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-c:v libvpx-vp9 -crf 32 -b:v 0 \
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-c:a libopus -b:a 128k \
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"$webm_out"
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fi
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echo "Done."
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echo "MP4: $mp4_out"
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echo "WebM: $webm_out"
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