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| #!/bin/bash
# ========= 环境检查 =========
if ! command -v ffmpeg &>/dev/null || ! command -v ffprobe &>/dev/null; then
echo "请先安装 ffmpeg 和 ffprobe"
exit 1
fi
echo "🎬 欢迎使用 视频分割小工具"
# ========= 文件大小格式化 =========
format_size() {
local bytes=$1
if (( bytes < 1073741824 )); then
size=$(echo "scale=2; $bytes / (1024 * 1024)" | bc)
printf "%.2fMB" "$size"
else
size=$(echo "scale=2; $bytes / (1024 * 1024 * 1024)" | bc)
printf "%.2fGB" "$size"
fi
}
# ========= 主循环 =========
while true; do
echo ""
echo "📥 拖入视频文件，或输入 q 退出："
IFS= read -r input_line
[[ "$input_line" == "q" ]] && echo "👋 已退出" && exit 0
eval "set -- $input_line"
inputs=()
for arg in "$@"; do
inputs+=("$arg")
done
for input in "${inputs[@]}"; do
if [ ! -f "$input" ]; then
echo "❗ 文件不存在：$input，跳过..."
continue
fi
echo ""
echo "🚀 正在处理：$input"
filename=$(basename "$input")
basename_no_ext="${filename%.*}"
dir=$(dirname "$input")
output_dir="$dir/${basename_no_ext}_parts"
mkdir -p "$output_dir"
filesize=$(stat -f%z "$input")
filesize_human=$(format_size "$filesize")
echo "📋 文件大小：$filesize_human"
# ========= 输入每段大小 =========
echo ""
read -p "请输入每段大小（GB，默认 1.9）: " size_gb
if [[ -z "$size_gb" ]]; then
size_gb=1.9
echo "📦 使用默认大小：1.9GB"
else
if ! [[ "$size_gb" =~ ^[0-9]+(\.[0-9]+)?$ ]]; then
echo "❌ 输入格式错误"
continue
fi
echo "📦 每段大小：${size_gb}GB"
fi
max_size=$(echo "$size_gb * 1024^3" | bc | cut -d'.' -f1)
duration=$(ffprobe -v error -show_entries format=duration -of csv=p=0 "$input")
duration_int=$(printf "%.0f" "$duration")
echo "📋 总时长：$duration_int 秒"
# ========= 智能估算分段 =========
estimated_parts=$(echo "($filesize + $max_size - 1) / $max_size" | bc)
part_duration=$(echo "$duration / $estimated_parts" | bc)
part_duration_int=$(printf "%.0f" "$part_duration")
((part_duration_int <= 0)) && part_duration_int=1
echo "🚀 预计分割为 $estimated_parts 段"
echo "⏱ 每段约 ${part_duration_int}s（关键帧对齐）"
# ========= 临时输出 =========
tmp_dir="$output_dir/_tmp_segments"
mkdir -p "$tmp_dir"
ffmpeg -loglevel quiet \
-fflags +genpts \
-i "$input" \
-c copy \
-map 0 \
-f segment \
-segment_time "$part_duration_int" \
-segment_time_delta 5 \
-reset_timestamps 1 \
-avoid_negative_ts make_zero \
"$tmp_dir/segment%03d.${filename##*.}"
# ========= 重命名 + 尾段合并 =========
idx=1
files=($(ls "$tmp_dir" | sort))
num_files=${#files[@]}
for i in "${!files[@]}"; do
f="${files[$i]}"
file_path="$tmp_dir/$f"
size=$(stat -f%z "$file_path")
# 检查是否是最后一段且小于前一段 5%
if (( i == num_files - 1 && num_files > 1 )); then
prev_file="$output_dir/${basename_no_ext}_part$(printf "%03d" $((idx-1))).${filename##*.}"
prev_size=$(stat -f%z "$prev_file")
threshold=$(echo "$prev_size * 0.05" | bc | cut -d'.' -f1)
if (( size < threshold )); then
# 合并到前一段
echo "⚡ 尾段太小，合并到上一段..."
ffmpeg -loglevel quiet -i "concat:$prev_file|$file_path" -c copy "$prev_file.tmp" && mv "$prev_file.tmp" "$prev_file"
continue
fi
fi
mv "$file_path" "$output_dir/${basename_no_ext}_part$(printf "%03d" $idx).${filename##*.}"
((idx++))
done
rm -rf "$tmp_dir"
echo ""
echo "✅ 分割完成"
echo "📂 输出目录：$output_dir"
for file in "$output_dir"/*; do
size_human=$(du -h "$file" | cut -f1)
echo " - $(basename "$file") [$size_human]"
done
open "$output_dir"
done
done
|
