First of all, lemme thank you guys for this great library, I was able to find the project through stack-overflow.

When a video is taken while the android camera is inverted, like upside down the value is wrong
i.e. it should be -90 instead of 90
after debugging I checked that the code does :
'Math.abs(right degree value);'
It's working fine with iPhone videos
you had this fix 6 months ago
961ad72

can you please apply it for the equivalent class in MP4
com.drew.metadata.mp4.boxes.TrackHeaderBox.addMetadata(Mp4Directory)

Thanks a lot