Refactor compress.py to with asyncio / threading.
The thread count depends on the system's processor count, similar to the defaults of `ThreadPoolExecutor`. Signed-off-by: KMSteffen <762141+haxys@users.noreply.github.com>
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KMSteffen
GitHub
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c027de26e0
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@ -1,112 +1,203 @@
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from PIL import Image, ImageOps
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import os
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import glob
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import argparse
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import aiofiles
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#!/usr/bin/env python3
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def get_parser(**parser_kwargs):
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"""Compress images in a folder to a maximum megapixel size."""
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import argparse
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import asyncio
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import os
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from concurrent.futures import ThreadPoolExecutor, as_completed
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from glob import iglob
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from multiprocessing import cpu_count
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from queue import Queue
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from PIL import Image, ImageFile, ImageOps
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# Prevent errors from halting the script.
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ImageFile.LOAD_TRUNCATED_IMAGES = True
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Image.warnings.simplefilter("error", Image.DecompressionBombWarning)
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VERSION = "2.0"
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SHORT_DESCRIPTION = "Compress images in a directory."
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SUPPORTED_EXTENSIONS = [".jpg", ".jpeg", ".png", ".webp"]
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def get_args(**parser_kwargs):
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"""Get command-line options."""
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parser = argparse.ArgumentParser(**parser_kwargs)
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parser.add_argument(
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"--img_dir",
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type=str,
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nargs="?",
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const=True,
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default="input",
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help="directory with images to be compressed",
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),
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parser.add_argument(
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"--max_mp",
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type=float,
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nargs="?",
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const=True,
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default=1.5,
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help="maximum megapixels to compress to",
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),
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parser.add_argument(
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"--quality",
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type=int,
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nargs="?",
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const=True,
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default=95,
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help="quality of compressed image, 0-100, suggest 90+",
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),
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parser.add_argument(
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"--delete",
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type=bool,
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nargs="?",
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const=True,
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default=False,
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help="delete original image after compression even if out_dir is different than img_dir",
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),
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help="path to image directory (default: 'input')",
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)
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parser.add_argument(
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"--out_dir",
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type=str,
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nargs="?",
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const=True,
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default=None,
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help="output folder, default is to overwrite original",
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),
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help="path to output directory (default: IMG_DIR)",
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)
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parser.add_argument(
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"--max_mp",
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type=float,
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default=1.5,
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help="maximum megapixels (default: 1.5)",
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)
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parser.add_argument(
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"--quality",
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type=int,
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default=95,
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help="save quality (default: 95, range: 0-100, suggested: 90+)",
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)
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parser.add_argument(
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"--overwrite",
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action="store_true",
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default=False,
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help="overwrite files in output directory",
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)
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parser.add_argument(
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"--noresize",
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type=bool,
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nargs="?",
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const=True,
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action="store_true",
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default=False,
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help="fixes EXIF rotation, saves WEBP, but do not resize",
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),
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help="do not resize, just fix orientation",
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)
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parser.add_argument(
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"--delete",
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action="store_true",
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default=False,
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help="delete original files after processing",
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)
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args = parser.parse_args()
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args.out_dir = args.out_dir or args.img_dir
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args.max_mp = args.max_mp * 1024000
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return args
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return parser
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if __name__ == '__main__':
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parser = get_parser()
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opt = parser.parse_args()
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def images(img_dir):
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"""Return each image in the input directory."""
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for file in iglob(f"{img_dir}/*.*"):
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if file.lower().endswith(tuple(SUPPORTED_EXTENSIONS)):
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yield file
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max_pixels = opt.max_mp * 1024000
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if opt.out_dir == None:
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opt.out_dir = opt.img_dir
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def inline(msg, newline=False):
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"""Print a message on the same line."""
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msg = f"\r{msg}"
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msg += " " * (79 - len(msg))
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print(msg, end="\n" if newline else "", flush=True)
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print(f"scanning: {opt.img_dir}, max pixels: {opt.max_mp}, quality: {opt.quality}")
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for infile in glob.glob(f"{opt.img_dir}/*"):
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ext = os.path.splitext(infile)[1]
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if ext in [".jpg", ".jpeg", ".png", ".webp"]:
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outfile = os.path.splitext(infile)[0] + ".webp"
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outfile = os.path.join(opt.out_dir, os.path.basename(outfile))
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try:
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img = Image.open(infile)
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exif = img.getexif()
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w, h = img.size
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pixels = w * h
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def launch_workers(queue, args):
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"""Launch a pool of workers."""
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loop = asyncio.new_event_loop()
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asyncio.set_event_loop(loop)
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tasks = [loop.create_task(worker(queue, args)) for _ in range(10)]
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loop.run_until_complete(asyncio.wait(tasks))
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if pixels <= max_pixels and not opt.noresize:
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print(f"skipping {infile}, {pixels} already under max of {pixels}")
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elif opt.noresize:
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print(f"exif rotation and WEBP compression on {infile}, to: {outfile}")
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img = ImageOps.exif_transpose(img)
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img.save(outfile, "WEBP", quality=opt.quality, method=5)
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else:
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# calculate new size
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ratio = max_pixels / pixels
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new_w = int(w * pow(ratio, 0.5))
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new_h = int(h * pow(ratio, 0.5))
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new_size = (new_w, new_h)
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try:
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img = img.resize(new_size)
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img = ImageOps.exif_transpose(img)
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#img = ImageOps.fit(image = img, size = (1536,1536))
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print(f"compressing: {pixels} to {new_w*new_h} pixels, in: {infile}, out: {outfile}")
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async def open_img(path):
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"""Open an image."""
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loop = asyncio.get_running_loop()
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try:
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return await loop.run_in_executor(None, Image.open, path)
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except Exception as err:
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inline(f"[!] Error Opening: {path} - {err}", True)
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return None
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if opt.delete:
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print(f"deleting: {infile}")
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os.remove(infile)
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img.save(outfile, "WEBP", quality=opt.quality, method=5)
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except Exception as ex:
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print(f"error in {infile}")
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raise ex
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def oversize(img, max_mp):
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"""Check if an image is larger than the maximum size."""
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return (img.width * img.height) > max_mp
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except Exception as ex:
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print(f"cannot open {infile}")
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raise ex
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async def process(image, args):
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"""Process an image."""
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outfile = image.replace(args.img_dir, args.out_dir).replace(
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os.path.splitext(image)[1], ".webp"
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)
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if args.overwrite or not os.path.exists(outfile):
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img = await open_img(image)
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if img:
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newimg = transpose(img)
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if not args.noresize and oversize(newimg, args.max_mp):
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newimg = shrink(newimg, args)
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if newimg != img:
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await save_img(newimg, outfile, args)
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if args.delete and outfile != image:
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os.remove(image)
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def slow_save(path, args, img):
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"""Save an image."""
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try:
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img.save(path, "webp", quality=args.quality)
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inline(f"[+] Compressed: {path}")
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except Exception as err:
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inline(f"[!] Error Saving: {path} - {err}", True)
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async def save_img(img, path, args):
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"""Save an image."""
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loop = asyncio.get_running_loop()
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await loop.run_in_executor(None, slow_save, path, args, img)
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def scan_path(queue, args):
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"""Scan the input directory for images."""
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inline("[*] Scanning for images...", True)
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for image in images(args.img_dir):
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inline(f"[+] {image}")
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queue.put(image)
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def shrink(img, args):
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"""Shrink an image."""
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pixels = img.width * img.height
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ratio = args.max_mp / pixels
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try:
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return ImageOps.scale(img, ratio, Image.LANCZOS)
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except Exception as err:
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inline(f"[!] Error Shrinking: {img.filename} - {err}", True)
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return img
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def start_compression(queue, args):
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"""Start the compression process."""
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inline("[*] Compressing images...", True)
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inline("[-] (scanning...)")
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with ThreadPoolExecutor() as executor:
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workers = {
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executor.submit(launch_workers, queue, args): None
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for _ in range(cpu_count())
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}
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for _ in as_completed(workers):
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pass
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inline("[!] Done!", True)
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def transpose(img):
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"""Transpose an image."""
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try:
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return ImageOps.exif_transpose(img)
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except Exception as err:
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inline(f"[!] Error Transposing: {img.filename} - {err}", True)
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return img
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async def worker(queue, args):
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"""Handle images from the queue until they're gone."""
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while not queue.empty():
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image = queue.get()
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await process(image, args)
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def main():
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"""Run the program."""
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queue = Queue()
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args = get_args(description=SHORT_DESCRIPTION)
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inline(f"[>] Image Compression Utility v{VERSION}", True)
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scan_path(queue, args)
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start_compression(queue, args)
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if __name__ == "__main__":
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main()
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