+# Mark specifically enabled, but normally autodetected libraries as requested.
+for lib in $AUTODETECT_LIBS; do
+ enabled $lib && request $lib
+done
+
+# Enable platform codecs by default.
+enable_weak audiotoolbox
+
+# Enable hwaccels by default.
+enable_weak d3d11va dxva2 vaapi vda vdpau videotoolbox_hwaccel xvmc
+enable_weak xlib
+
+enable_weak cuda cuvid nvenc vda_framework videotoolbox videotoolbox_encoder
+