$(call if_want,VAAPI,--enable-vaapi,--disable-vaapi) \
$(call if_want,VDPAU,--enable-vdpau,--disable-vdpau) \
$(call if_want,NV, --enable-nvenc --enable-nvdec --enable-ffnvcodec) \
$(call if_want,VAAPI,--enable-vaapi,--disable-vaapi) \
$(call if_want,VDPAU,--enable-vdpau,--disable-vdpau) \
$(call if_want,NV, --enable-nvenc --enable-nvdec --enable-ffnvcodec) \