include intended structure of root directory in docstring of Kinetics400

[pmeier]

Closes #3273.

[vadimkantorov]

Maybe add "example" files with other extensions? I think both mp4 and mkv appear in the torrent

[pmeier]

Maybe add "example" files with other extensions? I think both mp4 and mkv appear in the torrent

Currently we only allow .avi by default:

vision/torchvision/datasets/kinetics.py

Lines 41 to 42 in 870edfd

	def __init__(self, root, frames_per_clip, step_between_clips=1, frame_rate=None,
	extensions=('avi',), transform=None, _precomputed_metadata=None,

AFAIK there is no official way to download the dataset. Is the torrent you mentioned an unofficial one that is in widespread use? If so, please open an issue stating that we should allow more extensions.

[codecov]

Codecov Report

Merging #3453 (92db15c) into master (b266c2f) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3453      +/-   ##
==========================================
- Coverage   76.13%   76.11%   -0.02%     
==========================================
  Files         105      105              
  Lines        9703     9697       -6     
  Branches     1556     1556              
==========================================
- Hits         7387     7381       -6     
  Misses       1836     1836              
  Partials      480      480              

Impacted Files	Coverage Δ
torchvision/datasets/kinetics.py	40.00% <ø> (ø)
torchvision/transforms/_transforms_video.py	88.88% <0.00%> (-0.35%)	⬇️
torchvision/models/mobilenetv2.py	86.95% <0.00%> (-0.28%)	⬇️
torchvision/transforms/_functional_video.py	95.23% <0.00%> (-0.22%)	⬇️

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[vadimkantorov]

The torrent (https://academictorrents.com/details/184d11318372f70018cf9a72ef867e2fb9ce1d26) is not official as well. But from what I can understand, it was also downloaded with youtube-dl, so it probably makes sense to make extensions contain mp4, mkv, webm by default.

Attached torrent file lists:

• kinetics400.zip.txt

• kinetics400_validation.zip.txt

They contain mp4, mkv and webm files.

[fmassa]

Thanks!

[fmassa]

I'm ok allowing for more extensions than .avi in a follow-up PR

[pmeier]

I'm ok allowing for more extensions than .avi in a follow-up PR

@vadimkantorov Do you want to give this a shot? 🙂