119 lines
4.2 KiB
Bash
119 lines
4.2 KiB
Bash
#!/bin/bash
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# ffmpeg-eqmatch.sh
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# 這個 script 會自動將目標音訊檔案與參考檔案做 EQ Match。
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# 它首先分析兩個音訊檔案的響度值，計算它們在不同頻帶上的差異，
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# 然後使用 FFmpeg 的 equalizer 濾鏡對目標音訊檔案進行 EQ 處理，
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# 以使其頻率響應盡可能接近參考音訊檔案。
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# 用法：ffmpeg-eqmatch.sh <參考檔案> <你想要處理的檔案> [強度（預設 0.3）]
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# 檢查是否提供了兩個輸入檔案
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if [ $# -lt 2 ] || [ $# -gt 3 ]; then
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echo "請提供兩個聲音檔案作為參數，以及一個可選的強度值。"
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echo "用法: $0 <參考檔案> <想要處理的檔案> [強度（預設 0.3）]"
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exit 1
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fi
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# 將輸入檔案名存儲在變數中
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input_file1="$1"
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input_file2="$2"
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# 如果提供了強度值，則使用它；否則，使用預設值 0.3
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if [ $# -eq 3 ]; then
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strength="$3"
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else
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strength="0.3"
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fi
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# 函數：用 ffmpeg 提取響度值
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get_loudness_values() {
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local input_file="$1"
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local result=$(ffmpeg -i "$input_file" -filter_complex "
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aformat=channel_layouts=mono,
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acrossover=split=40 80 160 320 480 640 800 1000 1500 2000 3000 4500 6000 10000 15000
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[a][b][c][d][e][f][g][h][i][j][k][l][m][n][o][p],
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[a]ebur128,
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[b]ebur128,
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[c]ebur128,
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[d]ebur128,
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[e]ebur128,
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[f]ebur128,
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[g]ebur128,
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[h]ebur128,
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[i]ebur128,
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[j]ebur128,
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[k]ebur128,
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[l]ebur128,
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[m]ebur128,
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[n]ebur128,
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[o]ebur128,
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[p]ebur128
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" -f null - 2>&1)
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local max_band=16
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local loudness_values=()
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for ((i=2; i<=max_band+1; i++)); do
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local loudness=$(echo "$result" | sed -n "/\[Parsed_ebur128_${i}.*Summary:/,/LRA high:/ p" | grep "I:" | awk '{print $2}')
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loudness_values+=("$loudness")
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done
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echo "${loudness_values[@]}"
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}
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# 獲取兩個輸入檔案的響度值
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echo "正在分析參考檔案的響度值..."
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loudness_values1=($(get_loudness_values "$input_file1"))
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echo "參考檔案分析完成。"
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echo "正在分析目標檔案的響度值..."
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loudness_values2=($(get_loudness_values "$input_file2"))
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echo "目標檔案分析完成。"
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# 計算兩個檔案響度值的差距
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loudness_diff=()
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for ((i=0; i<${#loudness_values1[@]}; i++)); do
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diff=$(echo "${loudness_values1[$i]} - ${loudness_values2[$i]}" | bc)
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loudness_diff+=("$diff")
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done
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# 輸出分析結果
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echo "參考檔案分析值：${loudness_values1[@]}"
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echo "目標檔案分析值：${loudness_values2[@]}"
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echo "差距：${loudness_diff[@]}"
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# 得到輸入檔案的基本名稱（不包括副檔名）
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base_name=$(basename "$input_file2" | cut -d. -f1)
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# 構建輸出檔案名
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output_file="${base_name}_eqmatch_${strength}.wav"
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# 定義 equalizer 參數
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eq_params=(
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"equalizer=f=30:t=q:w=1:g=$(echo "${loudness_diff[0]} * $strength" | bc)"
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"equalizer=f=60:t=q:w=1:g=$(echo "${loudness_diff[1]} * $strength" | bc)"
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"equalizer=f=120:t=q:w=1:g=$(echo "${loudness_diff[2]} * $strength" | bc)"
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"equalizer=f=240:t=q:w=1:g=$(echo "${loudness_diff[3]} * $strength" | bc)"
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"equalizer=f=400:t=q:w=1:g=$(echo "${loudness_diff[4]} * $strength" | bc)"
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"equalizer=f=560:t=q:w=1:g=$(echo "${loudness_diff[5]} * $strength" | bc)"
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"equalizer=f=720:t=q:w=1:g=$(echo "${loudness_diff[6]} * $strength" | bc)"
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"equalizer=f=900:t=q:w=1:g=$(echo "${loudness_diff[7]} * $strength" | bc)"
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"equalizer=f=1250:t=q:w=1:g=$(echo "${loudness_diff[8]} * $strength" | bc)"
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"equalizer=f=1750:t=q:w=1:g=$(echo "${loudness_diff[9]} * $strength" | bc)"
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"equalizer=f=2500:t=q:w=1:g=$(echo "${loudness_diff[10]} * $strength" | bc)"
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"equalizer=f=3750:t=q:w=1:g=$(echo "${loudness_diff[11]} * $strength" | bc)"
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"equalizer=f=5250:t=q:w=1:g=$(echo "${loudness_diff[12]} * $strength" | bc)"
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"equalizer=f=8000:t=q:w=1:g=$(echo "${loudness_diff[13]} * $strength" | bc)"
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"equalizer=f=12500:t=q:w=1:g=$(echo "${loudness_diff[14]} * $strength" | bc)"
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"equalizer=f=17500:t=q:w=1:g=$(echo "${loudness_diff[15]} * $strength" | bc)"
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)
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# 將 equalizer 參數連接成一個字串
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eq_filter_string=$(IFS=,; echo "${eq_params[*]}")
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# 使用 FFmpeg 對目標檔案進行 EQ 處理
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echo "正在對目標檔案進行 EQ 處理..."
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ffmpeg -i "$input_file2" -af "$eq_filter_string,alimiter" "$output_file"
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echo "EQ 處理完成。輸出檔案：$output_file"
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