I'm using ffprobe to detect black frames of a video. However, the output produces duplicate entries for each black_start and black_end. Looking for help in figuring out why it duplicates these results.
ffprobe -f lavfi -i "movie=movie.mp4,blackdetect[out0]" -show_entries tags=lavfi.black_start,lavfi.black_end -of default=nw=1 -v quiet
TAG:lavfi.black_start=0
TAG:lavfi.black_start=0
TAG:lavfi.black_end=0.4004
TAG:lavfi.black_end=0.4004
TAG:lavfi.black_start=1813.68
TAG:lavfi.black_start=1813.68
TAG:lavfi.black_end=1814.38
TAG:lavfi.black_end=1814.38
TAG:lavfi.black_start=6620.85
TAG:lavfi.black_start=6620.85
TAG:lavfi.black_end=6621.88
TAG:lavfi.black_end=6621.88
TAG:lavfi.black_start=9069.16
TAG:lavfi.black_start=9069.16
TAG:lavfi.black_end=9070.69
TAG:lavfi.black_end=9070.69
TAG:lavfi.black_start=9081.84
TAG:lavfi.black_start=9081.84