Hi @DRM
I didn’t have to, someone already did, although he was complaining about interlaced Prores and not XDCAM but same problem.
Also found a reference to it on this forum:
https://forum.shotcut.org/t/interlaced-prores-kostya-exporting/132
Also see here:
https://lists.ffmpeg.org/pipermail/ffmpeg-user/2016-February/030864.html
Our playout server is quite happy with the resulting files but it bothers me that they are flagged as either progressive or sometimes interlaced but with bottom field first.