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To extract feature, you can refer regonizer2D backbone |
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Hi, I am trying to extract features from custom video clips with TSN.
Each video clip has about 5 min length
I refered code & readme in tools/data/THUMOS14 or activitynet
What I understand is that tools/misc/clip_feature_extraction.py is the script for extraction from a given config.
What make me confusing is that: to extract feature from ActivityNet or THUMOS, first it requires to extract frames from them, and make features from the extracted frames.
However, https://github.com/open-mmlab/mmaction2/blob/0.x/docs/en/feature_extraction.md does not extract frame.
it directly extract features from video.
My question is: when is extracting frames required? what is the difference?
Thank you in advance.
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