Extract the original audio track from a video using ffmpeg + ffprobe

extract_original_audio.sh

#!/bin/bash

# Check if the correct number of arguments is provided
if [ "$#" -ne 2 ]; then
    echo "Usage: $0 <input_file> <output_file>"
    exit 1
fi

input="$1"
output="$2"

# Find the "original" audio track dynamically
track=$(ffprobe -i "$input" -v error -select_streams a \
-show_entries stream=index:stream_tags=title -of csv=p=0 | grep -i "original" | cut -d ',' -f1)

if [ -z "$track" ]; then
    echo "No 'original' audio track found!"
    exit 1
fi

# Use the detected audio track index
ffmpeg -i "$input" -vn -acodec aac -map 0:"$track" "$output"

echo "File processed successfully: $output"

Example usage:

./extract_original_audio.sh MyVideo.mkv audio.aac