I3D Feature Extraction about a2net

[VividLe]

You can directly use the feature, without upsample.
The feature extraction process by I3D model would decrease the temporal length by a factor of $\frac{1}{8}$. Given 256 frames, you would obtain 32 features. In the paper, we use frame to indicate a feature vector, which correspond to 8 frames.

[mokiki1]

Thank you for your answer.

First, how to understand that stride = 4. Secondly, if can, I would like to know the length of the video input into the I3D model when you extract the features of a video.Finally, do you set overlap? thanks.