It is very slow when I input asf file (600MB) and execute "movie.set(cv2.CAP_PROP_POS_FRAMES, value)"

It is very slow when I input asf file (600MB) and execute “movie.set(cv2.CAP_PROP_POS_FRAMES, value)”.
avi, wmv, mp4 (600MB) are normal speed, so file size doesn’t seem to matter.
what is the cause?

yes, “seeking” may be inaccurate and cost some time. that is the nature of video files, not an issue with OpenCV.