The "scale" filter has wrong color range ("out_range") parameter autodetection and set

[ioctl]

Here are the steps to reproduce from scratch:

Generate video with the PC color range:

ffmpeg -f lavfi -i mandelbrot=end_pts=50:size=1920x1080 -pix_fmt yuv420p10le -vf scale=out_range=pc -t 5 mandelbrot-in.mkv

Variant 1, scale and encode with the x264:

ffmpeg -i mandelbrot-in.mkv -vf scale=960:-1:flags=lanczos mandelbrot-x264.mp4

ffprobe mandelbrot-x264.mp4 2>&1 | grep yuv4

in the output color type is yuv420p10le(progressive) , no PC spec

Variant 2, scale and encode with the svt-av1:

ffmpeg -i mandelbrot-in.mkv -vf scale=960:-1:flags=lanczos -c:v libsvtav1 mandelbrot-av1.mp4

ffprobe mandelbrot-av1.mp4 2>&1 | grep yuv4

in the output color type is yuv420p10le(tv, progressive) , PC become unexpected TV

Looks like the scale filter has incorrect input color range autodetection and/or incorrect set of this option for the further encoding.

[Balling]

Where is out_range=pc in second and third commands?

[ioctl]

There is no such option. Why it should be there?

It's not obvious that the scale filter will touch out_range. This behavior seems unexpected.

[Gyan]

Can't reproduce; works with git master.

[ioctl]

FYI.

Just tested git master version - works fine. This bug was in version 6.1.1