use a hw decoder for MediaCodec and visit https://storage.googleapis.com/liberato2/pixel_video_vp9.html

mcvd reports a visible rect / coded size of 384x240 .  ffprobe says that it's 320x240.  this is on a nexus 5x.

when i switch to a sw decoder (libvpx), we get 320.  mediacodec sw (also vpx) says 320.

it looks okay in both cases.  since everything agrees that visible rect == coded_size, the texture coords will range from  0 -> 1 in both cases.

is the hw decoder really outputting something that's 384?  if so, it has to be stretching the image to make it work right.