Youtube mp3 audio extractor : ./yt-audioClip.py "http://youtube?something" "00:15" "03:00" "extracted.mp3"

yt-audioClip.py

#!/bin/bash
youtube_url_or_local_file="https://www.youtube.com/watch?v=nDe8D6h9Vkk"
start_time_m="00:29"
end_time_m="00:32"
output_file_mp3="Italian.mp3"

# Check if 4 arguments are passed (YouTube URL or local file, start time, end time, output file)
if [ "$#" -eq 4 ]; then
    # Assign arguments to variables if passed
    youtube_url_or_local_file=$1
    start_time_m=$2
    end_time_m=$3
    output_file_mp3=$4
fi

input=$youtube_url_or_local_file
start_time=$start_time_m
end_time=$end_time_m
output_file=$output_file_mp3

# Function to extract YouTube video ID from URL
extract_youtube_id() {
    echo "$1" | grep -o 'watch?v=[^&]*' | cut -d'=' -f2
}

# Check if input is a YouTube URL
if [[ $input == http* && $input == *youtube.com* ]]; then
    # Extract YouTube video ID
    video_id=$(extract_youtube_id "$input")
    temp_file="./media/${video_id}.mp4"
    
    # Check if a file with this video ID already exists
    if [[ ! -f "$temp_file" ]]; then
        echo "Downloading video from YouTube using yt-dlp..."
        yt-dlp -f 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/mp4' -o "$temp_file" "$input"
    else
        echo "Using existing video file: $temp_file"
    fi
else
    # It's a local file
    echo "Using local file: $input"
    temp_file=$input
fi

# Convert times to seconds, ensuring that time values are not empty
start_min=${start_time_m%%:*}
start_sec=${start_time_m##*:}
end_min=${end_time_m%%:*}
end_sec=${end_time_m##*:}

start_seconds=$((start_min * 60 + start_sec))
end_seconds=$((end_min * 60 + end_sec))
duration=$((end_seconds - start_seconds))

# Extract and convert the audio segment to MP3
echo "Extracting audio..."
ffmpeg -i "$temp_file" -ss "$start_seconds" -t "$duration" -vn -acodec libmp3lame "./out/$output_file"

echo "Output saved to ./out/$output_file"