video.EncodeAccel* is the test to encode yuv raw data to some codecs (e.g. H264/VP8).
YUV raw data is not compressed and thus the data size tends to be large.
Because tast needs to put them in test image, it is mostly infeasible to put the YUV raw data.
To resolve this problem, we put data compressed by vp9 and decode them to yuv data by "libvpx".
We should install libvpx in test image by default for this task.
Comment 1 by nya@chromium.org
, Nov 2