ffmpeg convert .png to DNxHD .mov and scale color to bt709
ffmpeg -framerate 24000/1001 -i input_%04d.png -vf format=yuv422p10le -c:v dnxhd -b:v 180M output.mov



Use 24000/1001 or ntsc-film instead of the inaccurate 23.976 byname.
This encoder only supports the following pixel formats: yuv422p, yuv422p10le,  yuv444p10le,  gbrp10le. See ffmpeg -h encoder=dnxhd.
This encoder only supports specific combinations of bitrate, width, and height. See a list with ffmpeg -f lavfi -i nullsrc -c:v dnxhd -f null -.
bt709 should be automatically chosen, but verify it is what you want. See output of ffmpeg -i output.mov.