[Libav-user] How to detect video orientation

Lyndon Hill emptystate at yahoo.co.uk
Mon Mar 6 17:39:33 EET 2017

Can someone please direct me to the section of API I can use for detecting rotated video ?
For example, I record some video on my mobile phone in portrait orientation. Usually some meta data is recorded with the video file that I can use to tell which of the 4 orientations the video was recorded in.

In Apple's QuickTime API the equivalent function is GetTrackMatrix(Track, MatrixRecord).
Thank you in advance.

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