Add download functionality if available to all datasets

[pmeier]

🚀 Feature

Add download functionality if available to all datasets.

Motivation

Currently, the following datasets have no option to download them directly:

• Cityscapes
• Coco(Detection|Captions)
• Flickr(8|30)k
• HMDB51
• ImageNet
• Kinetics400
• LSUN
• UCF101

Pitch

Of those listed above only

• Cityscapes
• Flickr(8|30)k
• ImageNet

require some manual action that cannot be provided by us. For the others we can provide a download flag.

cc @pmeier

[pmeier]

Progress tracker:

• Coco(Detection|Captions)
• HMDB51
• Kinetics400 @bjuncek
• LSUN
• UCF101

[Acejoy]

Hey, is there any update on Flickr(8k | 30k) dataset. I have downloaded the dataset, but when I use the torchvison.datasets.Flickr8k class to load the Dataset, no image is loaded. Maybe you could add more documentation as to how the images and captions needed to be formatted.

Thanks.