[FFmpeg-devel] [PATCH] libavfilter/vaapi: enable vaapi rotation feature via call Intel iHD driver

[Moritz Barsnick]

On Tue, Oct 23, 2018 at 09:56:04 +0000, Li, Zhong wrote:
> Not sure vaapi can expose more angles or not.

VAAPI's rotation_state only supports those four "angles":
http://01org.github.io/libva_staging_doxygen/struct__VAProcPipelineParameterBuffer.html#ae05cc1f2189c9e85339f7c63e9a61e1c

> But using similar options/suboptions should be a good idea.

Great.

BTW, you could also introduce filters similar to hflip/vflip by using
VAProcPipelineParameterBuffer::mirror_state.

Moritz