I found that the result of getting the video direction is not very accurate.

[CNHarrySun]

Hello，I found that the result of getting the video direction is not very accurate.
Have you tried Vertical shooting, Horizontal screen recording, Horizontal shooting and Game moment?

It's my test log：

CGAffineTransform transform = videoTrack.preferredTransform;
Vertical screen recording：
a CGFloat 1
b CGFloat 0
c CGFloat 0
d CGFloat 1
tx CGFloat 0
ty CGFloat 0

Vertical shooting：
a CGFloat 0
b CGFloat 1
c CGFloat -1
d CGFloat 0
tx CGFloat 1080
ty CGFloat 0

Horizontal screen recording：
a CGFloat 0
b CGFloat -1
c CGFloat 1
d CGFloat 0
tx CGFloat 0
ty CGFloat 0

Horizontal shooting：
a CGFloat 1
b CGFloat 0
c CGFloat 0
d CGFloat 1
tx CGFloat 0
ty CGFloat 0

Game moment：
a CGFloat 1
b CGFloat 0
c CGFloat 0
d CGFloat 1
tx CGFloat 0
ty CGFloat 0