ffmpeg -loglevel warning -y -i peppers_267x267.png -pix_fmt nv12 peppers_267x267.nv12.yuv
[swscaler @ 0x1600b0000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x150008000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x1600b0000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x130008000] deprecated pixel format used, make sure you did set range correctly