Allow customizing thumbnail size

Author: URenko

comiclib/config.py

@@ -11,6 +11,8 @@ class Settings(BaseSettings):
     content: str = '.'
     cover: str = './thumb'
     thumb: Union[str, None] = None
+    thumb_width: int = 250
+    thumb_height: int = 350
     metadata: str = 'sqlite:///./comiclib_metadata.db'
     password: Union[str, None] = None
     skip_exits: bool = True

comiclib/utils.py

@@ -44,18 +44,18 @@ def convert_image(f_or_path, saveto: str, thumbnail=False):
     try:
         with Image.open(f_or_path) as im:
             if thumbnail:
-                im.thumbnail((500, 709))
+                im.thumbnail((settings.thumb_width, settings.thumb_height))
             im.save(saveto)
     except PIL.UnidentifiedImageError:
         if not isinstance(f_or_path, Path):
             with tempfile.NamedTemporaryFile() as tmpf:  # libjxl has problem with pipe yet
                 f_or_path.seek(0)
                 shutil.copyfileobj(f_or_path, tmpf)
                 tmpf.flush()
-                cmd = ['ffmpeg', '-i', tmpf.name, '-vf', 'scale=500:-1', str(saveto), '-y'] if thumbnail else ['ffmpeg', '-i', tmpf.name, str(saveto), '-y']
+                cmd = ['ffmpeg', '-i', tmpf.name, '-vf', f"scale='min({settings.thumb_width},iw)':'min({settings.thumb_height},ih)':force_original_aspect_ratio=decrease", str(saveto), '-y'] if thumbnail else ['ffmpeg', '-i', tmpf.name, str(saveto), '-y']
                 subprocess.run(cmd, check=True, stderr=None if settings.debug else subprocess.DEVNULL)
         else:
-            cmd = ['ffmpeg', '-i', str(f_or_path), '-vf', 'scale=500:-1', str(saveto), '-y'] if thumbnail else ['ffmpeg', '-i', str(f_or_path), str(saveto), '-y']
+            cmd = ['ffmpeg', '-i', str(f_or_path), '-vf', f"scale='min({settings.thumb_width},iw)':'min({settings.thumb_height},ih)':force_original_aspect_ratio=decrease", str(saveto), '-y'] if thumbnail else ['ffmpeg', '-i', str(f_or_path), str(saveto), '-y']
             subprocess.run(cmd, check=True, stderr=None if settings.debug else subprocess.DEVNULL)
 
 

docs/en/docs/settings.md

@@ -31,6 +31,8 @@ The following is a list of available settings:
 | `content` | The path where the comic file is stored | `.` |
 | `cover` | The path where the generated cover thumbnails are stored | `./thumb`|
 | `thumb` | The path where the generated page thumbnails are stored. If not provided (`None`), will be the same as `cover`. | `None`|
+| `thumb_width` | Maximum thumbnail width | 250 |
+| `thumb_height` | Maximum thumbnail height | 350 |
 | `metadata` | The URL for metadata database, refer to [SQLAlchemy documentation](https://docs.sqlalchemy.org/en/20/core/engines.html#database-urls) | `sqlite:///./comiclib_metadata.db` |
 | `password` | Admin password (also used as API Key currently) [^1]. If it is `None`, any visitor will have editing permissions. This feature is designed to protect against gentlemen but not villains. If you need security protection, please use e.g. the HTTP basic authentication of the reverse proxy, Cloudflare Access or TLS client certificate, etc. | `None`|
 | `skip_exists`| Skip comics that have been scanned into the metadata database during scanning? (`True`/`False`) | `True` |

docs/zh/docs/settings.md

@@ -31,6 +31,8 @@
 | `content` | 漫画文件存放的路径 | `.` |
 | `cover` | 生成的封面缩略图存放的路径。 | `./thumb`|
 | `thumb` | 生成的页面缩略图存放的路径。如果未提供 (`None`)，会和 `cover` 的值一样。| `None`|
+| `thumb_width` | 缩略图的最大宽度 | 250 |
+| `thumb_height` | 缩略图的最大高度 | 350 |
 | `metadata` | 元数据库 URL，参考[SQLAlchemy 文档](https://docs.sqlalchemy.org/en/20/core/engines.html#database-urls) | `sqlite:///./comiclib_metadata.db` |
 | `password` | 管理密码（目前也用作 API 密钥）[^1]，若为`None`则任何访客皆可编辑。此功能防君子不防小人，若需安全保护请借助反向代理的 HTTP 基本验证、Cloudflare Access 或 TLS 客户端证书等。| `None`|
 | `skip_exists`| 扫描时是否跳过曾扫入元数据库的漫画？（`True`/`False`）| `True` |