Support VA-API readback through glGetTexImage() instead of zerocopy.

[nageru] / README

diff --git a/README b/README
index 7113cb034fd155c6bbe485f9a151b1439ab6cab9..d7ed909ca953c11c0a4c1610a82191d48490cdd3 100644 (file)
--- a/README
+++ b/README
@@ -29,7 +29,9 @@ to 800 MHz after 30 seconds due to thermal constraints), Intel HD Graphics
 Nageru is in beta stage. It currently needs:
 
  - An Intel processor with Intel Quick Sync, or otherwise some hardware
-   H.264 encoder exposed through VA-API.
+   H.264 encoder exposed through VA-API. Note that you can use VA-API over
+   DRM instead of X11, to use a non-Intel GPU for rendering but still use
+   Quick Sync (by giving e.g. “--va-display /dev/dri/card0”).
 
  - Two or more Blackmagic USB3 cards, either HDMI or SDI. These are driven
    through the “bmusb” driver embedded in bmusb/, using libusb-1.0.