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Video Acceleration: Difference between revisions
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==See Also== | ==See Also== | ||
* [[Xorg hell]] page | * [[Xorg hell]] page | ||
* "[http://wiki.archlinux.org/index.php/Enable_XvMC_for_NVIDIA_video_cards Enable XvMC for NVIDIA]" at the ArchLinux wiki | |||
Revision as of 17:45, 20 May 2010
Linux offers access to video accelerators through programs like mplayer, VAAPI and vlc.
X-Video
Offloads 2D scaling and YUV colorspace conversions. Use xvinfo to determine Xv support:
X-Video Extension version 2.2
screen #0
Adaptor #0: "NV17 Video Texture"
number of ports: 32
port base: 313
operations supported: PutImage
supported visuals:
depth 24, visualID 0x21
depth 24, visualID 0x24
depth 24, visualID 0x25
depth 24, visualID 0x26...
XvMC
MPEG-2 and MPEG-4 offloading (NVIDIA's closed driver only supports MPEG-2, prefering VDPAU) via motion compensation and iDCT offload. Extends the Xv extension, using XvPorts. The 1.0 API specification was introduced in 2000.
VAAPI
The Video Acceleration API, a vendor-independent replacement for XvMC. It has backends for both VDPAU and XvBA.
VDPAU
NVIDIA's proprietary X.org video acceleration API, comparable to Microsoft's DXVA. It is independent from CUDA. Builds atop NVIDIA's PureVideo.
XvBA
ATI's answer to VDPAU, built atop ATI's Unified Video Decoder.
See Also
- Xorg hell page
- "Enable XvMC for NVIDIA" at the ArchLinux wiki
