ofVideoPlayer: vertical videos showing up rotated -90 (video metadata not being read)

I was trying to use a vertical video (1080w x 1920h) shot on my mobile (android) with ofVideoPlayer, but as I said in the title, the video is drawn rotated -90 counter-clockwise. I'm using El Capitan and oF 0.9.8. Is this a known issue or intended behavior? I did some searching but didn't find any other issues or posts about this. I'm just doing

// in ofApp.h
ofVideoPlayer video;

// in setup()
video.load("video.mp4"); 
video.play();

// in update()
video.update();

// in draw()
video.draw(0,0);

I took a peek inside the video metadata and found this.

So it has two relevant looking fields

Metadata:
    rotate : 90

And

Side data: 
    displaymatrix: rotation of -90.00 degrees

So I can think either one of two things is happening.

1. oF is seeing this displaymatrix info and rotating the video -90.
2. the video is natively at -90 and oF is not seeing the metadata (even though OSX finder-preview and quicktime display correctly).

Re-encoding the video (ffmpeg -i video.mp4 out.mp4) fixed the issue, likely because it dumped all the original metadata.

FWIW I have also noticed this problem when building for iOS and drawing videos pulled from the phone's media library using the AVFoundationVideoPlayer.

Messing around in the ofAVFoundationVideoPlayer.m I was able to get the video orientation with the bit below, but preferredTransform is readOnly in AssetTrack. So it looks like you would have to do something else (possibly with AVMutableCompositionTrack?) to set the correct orientation.

CGAffineTransform tf       = [videoTrack preferredTransform];
CGFloat videoAngleInDegree  = (atan2(tf.b, tf.a));
videoAngleInDegree *= 180 / M_PI;
NSLog(@"degrees = %f", videoAngleInDegree);

I uploaded the video here if anyone wants to test with it.
https://www.dropbox.com/s/l63161hgq3utcmy/dume.mp4?dl=0

Reproduce the rotation problem with the supplied dume.mp4 and the ofVideoPlayer example, then inspect ofAVFoundationVideoPlayer.m and the platform video-player paths mentioned in the issue. Compare the video metadata and AVFoundation preferredTransform behavior on macOS and iOS. Done means the supplied vertically recorded video draws upright without requiring re-encoding on the affected platforms.