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import imageio_ffmpeg as ffmpeg
import subprocess
import os
def merge_audio_files(mp3_names, silence_duration=500, output_path='result.mp3'):
"""
Merges a list of MP3 files into a single audio file with silence in between.
Args:
mp3_names (list): List of MP3 file paths to merge.
silence_duration (int): Duration of silence (in milliseconds) between audio segments.
output_path (str): Path to save the resulting merged audio.
Returns:
str: Path to the resulting merged audio file.
"""
print(f"DEBUG: mp3_names: '{mp3_names}'")
# Get the FFmpeg executable path from imageio_ffmpeg
ffmpeg_path = ffmpeg.get_ffmpeg_exe()
print(f"DEBUG: Using FFmpeg executable at: {ffmpeg_path}")
# Validate input files
for mp3_file in mp3_names:
if not os.path.exists(mp3_file):
raise FileNotFoundError(f"Audio file '{mp3_file}' not found.")
# Generate silence file using FFmpeg
silence_file = "silence.mp3"
silence_duration_seconds = silence_duration / 1000 # Convert to seconds
silence_cmd = [
ffmpeg_path,
"-f", "lavfi",
"-i", "anullsrc=r=44100:cl=mono",
"-t", str(silence_duration_seconds),
"-q:a", "9", # Set quality for silence (0 is best, 9 is worst)
silence_file
]
print("DEBUG: Generating silence file...")
subprocess.run(silence_cmd, check=True, stdin=subprocess.DEVNULL, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
# Create a temporary file to define input list for FFmpeg
concat_list_path = "concat_list.txt"
with open(concat_list_path, 'w') as f:
for i, mp3_file in enumerate(mp3_names):
# Use absolute paths for FFmpeg compatibility
f.write(f"file '{os.path.abspath(mp3_file)}'\n")
if i < len(mp3_names) - 1: # Add silence between files, except after the last
f.write(f"file '{os.path.abspath(silence_file)}'\n")
# Merge audio files with silence and re-encode to ensure compatibility
try:
merge_cmd = [
ffmpeg_path,
"-f", "concat",
"-safe", "0",
"-i", concat_list_path,
"-c:a", "libmp3lame", # Re-encode to MP3 using libmp3lame
"-q:a", "2", # Set quality level (0 is best, 9 is worst)
output_path
]
print("DEBUG: Merging audio files...")
print(f"DEBUG: FFmpeg command: {' '.join(merge_cmd)}")
result = subprocess.run(merge_cmd, check=True, stdin=subprocess.DEVNULL, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
print(f"DEBUG: FFmpeg stdout: {result.stdout}")
print(f"DEBUG: FFmpeg stderr: {result.stderr}")
except subprocess.CalledProcessError as e:
print(f"DEBUG: FFmpeg error output: {e.stderr}")
print(f"DEBUG: FFmpeg standard output: {e.stdout}")
raise RuntimeError(f"FFmpeg merging failed: {e}")
finally:
# Clean up temporary files
if os.path.exists(concat_list_path):
os.remove(concat_list_path)
if os.path.exists(silence_file):
os.remove(silence_file)
print('DEBUG: Audio merging complete!')
return output_path
# Test the function with audio_0.mp3 and audio_1.mp3
if __name__ == "__main__":
mp3_files = ["audio_0.mp3", "audio_1.mp3"] # Ensure these files exist in your directory
try:
output_file = merge_audio_files(mp3_files, silence_duration=500, output_path="merged_audio_result.mp3")
print(f"Audio files merged successfully. Output saved at: {output_file}")
except Exception as e:
print(f"An error occurred during the merging process: {e}")
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