I have an 8bpc .png sequence in RGB color space (full range 0-255 of course) that I need to convert to DNxHD bt709 "legal" range (16-235). Here is where I am so far:
ffmpeg -framerate 23.976 -i input_%04d.png -vcodec dnxhd -b:v 175M outfile.mov
This throws an error:
pixel format is incompatible with DNxHD profile. I used to do this all the time in a earlier version of ffmeg with no issue... I assume it has to do with the color space, and in looking through the "colorspace" filter documentation I am uncertain what the proper command would be. As mentioned I do want to actually transform the values to bt709, legal range.