Use Python & FFmpeg to reduce video sizes

reduce_videos.py

import os
import subprocess

DRY_RUN = False

# Function to find all video files in the current directory
def find_video_files():
    video_files = []
    for file in os.listdir('.'):
        if file.endswith('.mkv') or file.endswith('.mp4'):
            video_files.append(file)
    return video_files

# Function to execute FFmpeg command on each video file
def process_files(video_files):
    for input_file in video_files:
        file_extension = input_file.split(".")[-1]

        if '.reduced.' in input_file:
            print("\n\x1b[33mSkipping:", input_file, "\x1b[37m")
            continue
        else:
            print("\n\x1b[32mEncoding:", input_file, "\x1b[37m")

        output_file = os.path.splitext(input_file)[0] + '.reduced.' + file_extension
        ffmpeg_command = [
            'ffmpeg',
            '-y',
            '-hide_banner',
            '-i', input_file,
            '-vf', 'scale=854:-2', # Scale down to a width of 854 pixels, keeping the aspect ratio
            '-c:v', 'libx264',
            '-preset', 'slow',
            '-crf', '28', # Increase the CRF value for smaller file size
            '-c:a', 'copy',
            '-c:s', 'copy',
            # '-threads', '2',
            output_file
        ]

        if not DRY_RUN:
            # Execute FFmpeg command as a subprocess
            subprocess.run(ffmpeg_command)
        else:
            print(ffmpeg_command)        

# Find all video files in the current directory
video_files = find_video_files()
if video_files:
    # Process each video file
    process_files(video_files)
    print("Conversion completed successfully.")
else:
    print("No video files found in the current directory.")