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#!/usr/bin/env python3
"""
Use ffmpeg to compress one or more video files.
This script takes a list of video files and compresses them using the
libsvtav1 codec for video and libopus for audio. The original files
are removed after successful compression.
Usage:
python comp.py [options] file1.mp4 file2.mov ...
Examples:
# Compress two files with default settings (crf=36, preset=6)
python comp.py "Screen Recording 1.mp4" "Screen Recording 2.mp4"
# Compress all mp4 files in the current directory with a different crf
python comp.py --crf 40 *.mp4
# Compress a file with a different preset and crf
python comp.py --preset 8 --crf 32 my_video.mkv
"""
from subprocess import check_call
from pathlib import Path
import argparse
import sys
def main():
"""Main function to parse arguments and compress videos."""
parser = argparse.ArgumentParser(
description="Compress video files using ffmpeg with libsvtav1.",
formatter_class=argparse.RawTextHelpFormatter # To keep usage examples formatted
)
# Required positional argument for input files.
# nargs='+' means one or more arguments.
parser.add_argument(
'files',
nargs='+',
help="One or more video files to compress."
)
# Optional, overwritable argument for CRF
parser.add_argument(
'--crf',
type=int,
default=36,
help="Constant Rate Factor (CRF) for video quality.\n"
"Lower is better quality. Default: 36."
)
# Optional, overwritable argument for preset
parser.add_argument('--preset',
type=int,
default=8,
help="Encoding preset for speed/quality trade-off.\n"
"Higher is faster. Default: 6."
)
args = parser.parse_args()
# Process each file provided on the command line
for file_str in args.files:
video_path = Path(file_str)
if not video_path.exists():
print(f"Error: File not found, skipping: {video_path}", file=sys.stderr)
continue
output_filename = f'{video_path.stem}.comp.av1-crf{args.crf}.mp4'
print(f"-> Compressing '{video_path.name}'...")
print(f" CRF: {args.crf}, Preset: {args.preset}, Output: '{output_filename}'")
try:
# Construct and run the ffmpeg command
check_call([
'ffmpeg',
'-hide_banner', '-i', video_path,
'-c:v', 'libsvtav1',
'-crf', str(args.crf),
'-preset', str(args.preset),
'-c:a', 'libopus',
'-b:a', '96k', '-vbr', 'on',
output_filename
])
print(f" Compression successful.")
# Remove the original video after successful compression
video_path.unlink()
print(f" Removed original file: '{video_path.name}'\n")
except Exception as e:
print(f"An error occurred while processing {video_path.name}: {e}", file=sys.stderr)
print(" Leaving original file intact.\n", file=sys.stderr)
if __name__ == "__main__":
main()