优化IO问题，使用异步方案进行视频下载等操作。

wechat_ipad/client/message.py

@@ -13,6 +13,7 @@ import pysilk
 from loguru import logger
 from pydub import AudioSegment
 from pymediainfo import MediaInfo
+import aiofiles
 
 from utils.video_utils import get_first_frame, get_first_frame_bytes
 from wechat_ipad import UserLoggedOut
@@ -178,8 +179,8 @@ class MessageMixin(WechatAPIClientBase):
         elif isinstance(image, bytes):
             image = base64.b64encode(image).decode()
         elif isinstance(image, os.PathLike):
-            with open(image, 'rb') as f:
-                image = base64.b64encode(f.read()).decode()
+            async with aiofiles.open(image, 'rb') as f:
+                image = base64.b64encode(await f.read()).decode()
         else:
             raise ValueError("Argument 'image' can only be str, bytes, or os.PathLike")
 
@@ -239,8 +240,8 @@ class MessageMixin(WechatAPIClientBase):
             video_path = Path(video)
             if not video_path.exists():
                 raise ValueError(f"Video file does not exist: {video_path}")
-            with open(video_path, "rb") as f:
-                video_bytes = f.read()
+            async with aiofiles.open(video_path, "rb") as f:
+                video_bytes = await f.read()
             file_len = len(video_bytes)
             vid_base64 = base64.b64encode(video_bytes).decode()
             media_info = MediaInfo.parse(video_path)
@@ -266,8 +267,8 @@ class MessageMixin(WechatAPIClientBase):
         elif isinstance(image, bytes):
             image_base64 = base64.b64encode(image).decode()
         elif isinstance(image, os.PathLike):
-            with open(image, "rb") as f:
-                image_base64 = base64.b64encode(f.read()).decode()
+            async with aiofiles.open(image, "rb") as f:
+                image_base64 = base64.b64encode(await f.read()).decode()
         else:
             raise ValueError("image should be str, bytes, or path")
         # self.logging.debug(f"vid_base64:{vid_base64}")
@@ -327,8 +328,8 @@ class MessageMixin(WechatAPIClientBase):
         elif isinstance(voice, bytes):
             voice_byte = voice
         elif isinstance(voice, os.PathLike):
-            with open(voice, "rb") as f:
-                voice_byte = f.read()
+            async with aiofiles.open(voice, "rb") as f:
+                voice_byte = await f.read()
         else:
             raise ValueError("voice should be str, bytes, or path")
         voice_type = 0