Andrew,
Initial test shows Vaapi working with all 3 patches in.  Have to boot another computer later this morning to check vdpau and will let you know.

On Mon, Mar 7, 2022 at 8:51 PM Andrew Randrianasulu via Cin <cin@lists.cinelerra-gg.org> wrote:
so I  played around with vp9 enciding a bit more.
apoarently there is vp9 lossless mode, and additionally libvpx can support high bit depth if configured so. 

I also tried to remove (currently unused?) libavdevice build from ffmpeg, and fix termux breakage (libandroid-shmem lib was missing) 

try attached patches and check if vdpau/vaapi still works? 
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