Matroska: turn special projection values into horizontal/vertical flip
Special Yaw/Roll/Pitch combination found at https://github.com/ietf-wg-cellar/matroska-specification/pull/466
It may also be handled globally for all containers when a projection is found.
We have ORIENT_HFLIPPED
, ORIENT_VFLIPPED
and ORIENT_ROTATED_180
.