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Bug in OpenCv, cap.set(cv2.CAP_PROP_POS_FRAMES, index) returning *wrong* frames ! #12

@yzerlaut

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@yzerlaut

Hey,

In case you didn't know, look at this bug:
opencv/opencv#9053

This means that when we're using:

cap.set(cv2.CAP_PROP_POS_FRAMES, index)
ok, frame = cap.read()

you're getting the wrong frame !

From what I tested, in our videos, the frame returned can be off by +/- 2s, that's huge !

And I couldn't find any good way to reliably grab a frame from a video file... If you find one let me know !

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