修改文件名

2026-07-25 21:20:41 +08:00
parent 3fd0b046b0
commit 4ab8a8a95b
2 changed files with 3 additions and 0 deletions
@@ -0,0 +1,120 @@
+# pip install pillow
+from PIL import Image
+import os
+import shutil
+
+def get_file_kb(file_path: str) -> float:
+    """获取文件大小 KB"""
+    size_byte = os.path.getsize(file_path)
+    return size_byte / 1024
+
+def compress_to_jpg_loop(
+    input_path: str,
+    output_path: str,
+    min_size_kb: float,
+    max_size_kb: float,
+    init_quality: int,
+    quality_step: int,
+    min_quality: int,
+    max_width: int,
+    max_height: int
+):
+    try:
+        ori_size = get_file_kb(input_path)
+        print(f"\n原图: {os.path.basename(input_path)} | 大小: {ori_size:.2f} KB")
+
+        # 小于阈值，直接复制原图，不压缩
+        if ori_size < min_size_kb:
+            shutil.copy2(input_path, output_path)
+            print(f"✅ 小于{min_size_kb}KB，无需压缩，直接复制")
+            return
+
+        # 打开图片，处理透明通道
+        img = Image.open(input_path)
+        if img.mode in ("RGBA", "P"):
+            new_img = Image.new("RGB", img.size, (255, 255, 255))
+            mask = img.split()[-1] if img.mode == "RGBA" else None
+            new_img.paste(img, mask=mask)
+            img = new_img
+
+        # 等比例缩放
+        if max_width and max_height:
+            img.thumbnail((max_width, max_height))
+
+        current_quality = init_quality
+        while True:
+            img.save(output_path, format="JPEG", quality=current_quality, optimize=True)
+            out_size = get_file_kb(output_path)
+
+            if out_size <= max_size_kb or current_quality <= min_quality:
+                print(f"✅ 最终画质 {current_quality} | 输出大小: {out_size:.2f} KB")
+                break
+
+            current_quality -= quality_step
+            print(f"⚠️ {out_size:.2f}KB > {max_size_kb}KB，降低画质至 {current_quality} 重新压缩")
+
+    except Exception as e:
+        print(f"❌ 处理失败 {input_path}：{str(e)}")
+
+
+def batch_compress_folder(
+    input_dir: str,
+    output_dir: str,
+    min_kb,
+    max_kb,
+    init_q,
+    q_step,
+    min_q,
+    max_w,
+    max_h
+):
+    os.makedirs(output_dir, exist_ok=True)
+    support_ext = (".png", ".jpg", ".jpeg", ".webp", ".bmp")
+
+    for filename in os.listdir(input_dir):
+        file_path = os.path.join(input_dir, filename)
+        if not filename.lower().endswith(support_ext):
+            continue
+        if os.path.isdir(file_path):
+            continue
+
+        name_no_ext = os.path.splitext(filename)[0]
+        out_file = os.path.join(output_dir, f"{name_no_ext}.jpg")
+        compress_to_jpg_loop(
+            input_path=file_path,
+            output_path=out_file,
+            min_size_kb=min_kb,
+            max_size_kb=max_kb,
+            init_quality=init_q,
+            quality_step=q_step,
+            min_quality=min_q,
+            max_width=max_w,
+            max_height=max_h
+        )
+
+
+if __name__ == "__main__":
+    # ==================== 批量配置区（仅需修改这里） ====================
+    INPUT_FOLDER = "./input"
+    OUTPUT_FOLDER = "./output"
+    MIN_SIZE_KB = 200      # 小于该KB不压缩
+    MAX_SIZE_KB = 800      # 超过该KB循环再压
+    INIT_QUALITY = 75      # 初始画质
+    QUALITY_STEP = 8       # 每次降低画质数值
+    MIN_QUALITY = 20       # 最低画质底线
+    LIMIT_W = 2560         # 不需要缩放填 None
+    LIMIT_H = 1440
+    # ==================================================================
+
+    # 仅批量执行，无任何单张代码
+    batch_compress_folder(
+        input_dir=INPUT_FOLDER,
+        output_dir=OUTPUT_FOLDER,
+        min_kb=MIN_SIZE_KB,
+        max_kb=MAX_SIZE_KB,
+        init_q=INIT_QUALITY,
+        q_step=QUALITY_STEP,
+        min_q=MIN_QUALITY,
+        max_w=LIMIT_W,
+        max_h=LIMIT_H
+    )