HW Accel

OS	HW Acceleration
Linux	QSV, NVENC, AMF, VA-API
Windows	QSV, NVENC, AMF
MacOS	VideoToolbox
RPi	V4L2

Vendor	HW Acceleration
NVIDIA	NVENC
AMD	AMF, VA-API
Intel	QSV, VA-API
Apple	VideoToolbox
RPi	V4L2

Project	Graphics Gen	Repo
oneVPL	gen12+	​https://github.com/oneapi-src/oneVPL
iHD driver	gen8+	​https://github.com/intel/media-driver
Libva	gen5+	​https://github.com/intel/libva
MSDK	gen8 ~ gen12(Rocket Lake)	​https://github.com/Intel-Media-SDK/MediaSDK
i965 driver	gen5 ~ gen9.5	​https://github.com/intel/intel-vaapi-driver

• Intel QuickSync (QSV)
  • 基于 VAAPI
• 没有硬解支持 H.264 / AVC 10-bit
  • 升级为 HEVC 10-bit
• /usr/lib/dri/ - 安装的驱动
  • iHD_drv_video.so
  • i965_drv_video.so
• /dev/dri/render* DRM render node
• i915
• i965

cat /proc/cpuinfo | grep "model name" | uniq

apk add pciutils
lspci -nn | egrep -i "3d|display|vga"

apk add lshw
lshw -C display
lshw -c video

apk add inxi
inxi -G

# i915_cur_delayinfo
sudo sh -c 'cat /sys/kernel/debug/dri/*/name'


ls /dev/dri

# VA-API
# ==========
# AlpineLinux edge/testing libva-utils
apk -X https://mirrors.sjtug.sjtu.edu.cn/alpine/edge/testing add libva-utils
vainfo
# https://github.com/intel/libva-utils
# /dev/dri/renderXX

# Intel QSV
# =============
apk add intel-media-driver libva-intel-driver
sudo LIBVA_TRACE=/tmp/libva_trace.log DRI_PRIME=1 LIBVA_DRIVER_NAME=iHD vainfo

LIBVA_TRACE=/tmp/libva_trace.log DRI_PRIME=1 LIBVA_DRIVER_NAME=iHD ffmpeg -loglevel verbose -init_hw_device vaapi

# options i915 enable_guc=3
# options i915 enable_fbc=1
echo "options i915 force_probe=4692" | sudo tee /etc/modprobe.d/i915.conf

# GPU freq
sudo find /sys -type f -name gt_cur* -print0

# X11
# ==========
# apk add vdpauinfo
# vdpauinfo
grep -iE 'vdpau | dri driver' /var/log/Xorg.0.log

# FFMpeg
# =======
ffmpeg -hide_banner -decoders | grep qsv # 判断是否有加速
ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/renderD128 -i "video.MP4" -vf "select=eq(pict_type\,I)" -vsync vfr -qscale:v 2 -f image2 "%08d.jpg"

FFmpeg

• {h264,hevc}_{videotoolbox,amf,vaapi}
  • videotoolbox - macOS
  • amf - Windows
  • vaapi - Linux - vainfo
• -hwaccel auto
  • dxva2,cuda,d3d11va,videotoolbox
  • -hwaccel_device

ffmpeg -encoders | grep videotoolbox # 支持的 videotoolbox 编码
ffmpeg -h encoder=h264_videotoolbox  # 查看编码器选项

ffprobe in.mp4                           # 弄清楚原始 bitrate
ffmpeg -b:v 1900k -c:v h264_videotoolbox # -b:v 匹配原始 bitrate

# 使用 hwaccel 方式 - 外置 GPU
ffmpeg \
  -hwaccel videotoolbox -i in.mp4 \
  -c:v libx265 -preset medium -crf 28 \
  -c:a copy \
  out.mp4

• apple VideoToolbox
  • Decode H.263, H.264, HEVC, MPEG1, MPEG2, MPEG4, ProRes
  • Encode H.264, HEVC, ProRes
  • 不支持 CRF/constant quality - 必须指定 -b:v
• HWAccelIntro
  • macOS: VideoToolbox
  • OpenCL 大多平台支持，但是不可以 encode/decode - 用于 Filtering
  • Hardware/QuickSync
• Intel Quick Sync Video
  • 查看 Intel CPU 支持的编码
• List of Macintosh models grouped by CPU type
  • 查看 Macbook 对应的 Intel CPU 版本
• intel/media-driver
  • Intel(R) Media Driver for VAAPI
• joshuaboniface/rffmpeg
  • remote SSH FFmpeg
• archlinux Hardware video acceleration
• https://jellyfin.org/docs/general/administration/hardware-acceleration.html
• intel/intel-device-plugins-for-kubernetes
• https://www.techspot.com/article/1131-hevc-h256-enconding-playback/
• https://www.elpamsoft.com/?p=Plex-Hardware-Transcoding
• intel/vaapi-bypass

vaInitialize failed with error code 18

看不到显卡

• 尝试调整 BIOS - 修改为可切换显卡