VA-API

• intel/libva
• VA-API - Videp Acceleration API
  • by Intel
  • 兼容更多
• VDPAU - Video Decode and Presentation API for Unix
  • by Nvdia
• DRI - Direct Rendering Infrastructure

apk add pciutils
lspci | grep -i graph
lspci -v -s $(lspci | grep VGA | cut -d" " -f 1)

apk add libva-utils
vainfo

apk add vdpauinfo
vdpauinfo

ls /usr/lib/dri/
ls /usr/lib/dri/${LIBVA_DRIVER_NAME}_drv_video.so

ls /dev/dri

LIBVA_DRIVER_NAME=iHD vainfo --device card1 --display drm
LIBVA_DRIVER_NAME=i1965 LIBVA_TRACE=./vainfo.log vainfo

# 内核模块
modinfo i915

# https://github.com/gjasny/v4l-utils
apk add v4l-utils
v4l2-ctl --list-devices

• LIBVA_DRIVER_NAME
• Intel graphics
  • libva-intel-driver i965
    • 早期 - brodwell、skylake
  • intel-media-driver iHD
    • 后期 - kebey lake、coffee lake
• NVIDIA
  • Nouveau nouveau.
  • NVIDIA VDPAU vdpau
  • NVIDIA NVDEC nvidia
• AMD
  • AMDGPU radeonsi
• libva-vdpau-driver
  • VDPAU backend for VA API
• VAProfileNone
• intel_gpu_top
  • debian intel-gpu-tools
• i915 内核通用模块
• V4L2 - Video4Linux2
  • 电视卡、网络摄像头、模拟视频采集卡
  • 视频设备管理和控制
• Iris
  • Intel Iris Graphics
  • Gen11 GPU
  • 优于 i964 Mesa
  • Ice Lake(9代)+

---

• CFL - Coffee Lake
• ICL - Ice Lake
• Intel N100
  • Intel® UHD Graphics
  • Alder Lake-N
  • https://ark.intel.com/content/www/us/en/ark/products/231803/intel-processor-n100-6m-cache-up-to-3-40-ghz.html
• https://en.wikipedia.org/wiki/Intel_Quick_Sync_Video#Hardware_decoding_and_encoding
• https://wiki.archlinux.org/title/Hardware_video_acceleration

00:02.0 VGA compatible controller: Intel Corporation Alder Lake-N [UHD Graphics] (prog-if 00 [VGA controller])
	DeviceName: Onboard - Video
	Subsystem: Intel Corporation Device 7270
	Flags: bus master, fast devsel, latency 0, IRQ 137
	Memory at 6000000000 (64-bit, non-prefetchable) [size=16M]
	Memory at 4000000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 3000 [size=64]
	Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: i915