Decord's documentation notebook reports misleading Decord vs OpenCV performance

[ahmadsharif1]

Navigate to this webpage:

https://cv.gluon.ai/build/examples_action_recognition/decord_loader.html

I see this:

Out:

Decord takes 3.5792 seconds. OpenCV takes 0.0002 seconds.

We can see that Decord is 2x faster than OpenCV VideoCapture. We also compare with Pyav container and demonstrate 2x speed up as well.

Probably OpenCV is not actually doing any decoding in the loop, so the comparison is unfair. Still, it appears to be misleading to the user who is reading the website.

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