vdpau libs installed and mesa built with:
./configure --prefix=/usr --enable-gallium-egl --enable-gallium-gbm --enable-gallium-llvm --enable-gbm --enable-gles1 --enable-gles2 --enable-glx-tls --enable-osmesa --enable-texture-float --enable-xa --with-egl-platforms=drm --with-gallium-drivers=r300,r600,svga,swrast,radeonsi,nouveau
It appears mesa no longer automagically detects vdpau. Manually specifying --enable-vdpau builds the needed libs. It would be super if autodetection could be fixed again!
Thanks for reporting, a silly thinko on my behalf is causing this behaviour.
Can you confirm that the patch  fixes the issue on your system ?
Managed to reproduce the problem and confirm that the patch fixes it.
Feel free to reopen if it's failing on your setup.
Author: Emil Velikov <firstname.lastname@example.org>
Date: Wed Jun 11 22:15:58 2014 +0100
configure: correctly autodetect xvmc/vdpau/omx
Commit e62b7d38a1d (configure: autodetect video state-trackers
when non swrast driver is present) added a check that caused
the autodetection to be omitted when we have the swrast gallium
driver. Whereas it should have skipped the VL targets when only
swrast was selected.
on Dec 04, 2016 at 08:11:41.
(provided by the Example extension).