Hi Anders On Mon, Mar 10, 2025 at 09:24:05PM +0100, Anders Rein wrote: > Hi! Thanks for the feedback.I have no problem adding the "X-" prefix > to the field order key, however I was just following the way > "r_frame_rate" was passed. As far as I can see this field is not > mentioned in nut.txt either and should also be using the X- prefix. Or > am I missing something? r_frame_rate is docuemnted in: https://git.ffmpeg.org/gitweb/nut.git/blob_plain/HEAD:/docs/nut.txt where did you find a outdated nut.txt ? thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB The smallest minority on earth is the individual. Those who deny individual rights cannot claim to be defenders of minorities. - Ayn Rand