FFMPEG not writing quicktime "COLR" atom I am attempting to create Quicktime movs with the "DNXHD" codec with the following ffmpeg command (input part excluded):

-c:v dnxhd -b:v 175M -pix_fmt yuv422p10le test.mov


This works, and is displayed fine in After Effects and Premiere.  However, it does not play back correctly in Quicktime Player - it looks slightly "washed out".  My understanding of this is that Quicktime Player uses the "COLR" atom to determine the color space of the video file for playback.  So, after some research I came upon this ffmpeg option:

-movflags +write_colr


But, it doesn't seem to do anything.  Analyzing the video with "exiftool" shows that the atom was not written.

I am using FFMPEG version 2.8.6, installed with homebrew on Mac OS 10.11.3.

Anyone know how to make ffmpeg's movs comply with Quicktime Player's expectations?
That is an experimental flag, so you will have to use

-movflags +write_colr -strict experimental