Fix jit-scriptability

Author: datumbox

torchvision/transforms/_presets.py

@@ -108,16 +108,16 @@ def forward(self, vid: Tensor) -> Tensor:
 
         _, T, C, H, W = vid.shape  # (N, T, C, H, W)
         vid = vid.view(-1, C, H, W)
-        if self.resize_size:
+        if self.resize_size is not None:
             vid = F.resize(vid, self.resize_size, interpolation=self.interpolation)
-        if self.crop_size:
+        if self.crop_size is not None:
             if self.crop_mode == "center_crop":
                 vid = F.center_crop(vid, self.crop_size)
             else:
                 crops = (
-                    F.five_crop(vid, self.crop_size)
+                    list(F.five_crop(vid, self.crop_size))
                     if self.crop_mode == "five_crop"
-                    else F.ten_crop(vid, self.crop_size)
+                    else list(F.ten_crop(vid, self.crop_size))
                 )
                 vid = torch.cat(crops)
         vid = F.convert_image_dtype(vid, torch.float)