How do you get FFMPEG to encode with vaapi?

Question

I\'ve seen various examples of using libavcodec with vaapi to accelerated decoding, but how do you use it to accelerate encoding?

Answer 1

FFMPEG does not currently (as of 10-01-2014) support encoding with the VAAPI. It currently only supports decoding with VAAPI.

Update 2020: FFMPEG now supports fully supports VAAPI.