ffmpeg -pix_fmts ?
ffmpeg -i ImageSegmentation_threshold_histogram.jpg -f rawvideo -pix_fmt yuv420p ImageSegmentation_threshold_histogram_4032X3024_yuv420.yuv
Imagemagick tool (Default YUV is YUV420)
convert ImageSegmentation_threshold_histogram.jpg -colorspace YUV output420.yuv
https://github.com/IENT/YUView
specify resolution 4032X3024