hschlueter f3d76e9e2f Keep orientation information during the transformation.
The input rotation is used to rotate the video during decoding, the
video is rotated so that it is in landscape orientation before encoding
and a rotation is added to the output format where necessary so that
the output video has the same orientation as the input.

PiperOrigin-RevId: 415301328
2021-12-10 17:25:53 +00:00
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