What is current status for hardware H.265 encoding.

[Mister XY]

what do you mean with low power mode?

Detected avaliable features for hw API v1.35, HEVC, Constant QP (CQP)
RC mode o
10bit depth o
Fixed Func o
Interlace o
VUI info o
Trellis x
Adaptive_I x
Adaptive_B x
WeightP o
WeightB o
FadeDetect o
B_Pyramid o
+ManyBframes o
PyramQPOffset o
MBBRC x
ExtBRC x
Adaptive_LTR x
LA Quality x
QP Min/Max x
IntraRefresh x
No Deblock o
No GPB o
Windowed BRC x
PerMBQP(CQP) o
DirectBiasAdj x
MVCostScaling x
SAO x
Max CTU Size x
TSkip x
HEVC SAO is not supported on current platform, disabled.

[Yups]

It's called fixed function in QSVEnc. Intel calls it low power.


--fixed-func use fixed func instead of GPU EU (default: off)

[Mister XY]

with --fixed-func qsvenc has a crash, but i see in log

HEVC SAO is not supported on current platform, disabled

.

[Yups]

SAO isn't supported by QSVEnc and that's why you get this message. This is unrelated to the FF/low power mode.

[Mister XY]

How good is the ryzen 5600g in hardware encode?

[RanmaCanada]

Originally Posted by Mister XY

How good is the ryzen 5600g in hardware encode?

AMD has always sucked. The 5600G runs Vega 7, and uses VCN 2.0. If you want to do hardware encoding, Intel Quicksync, especially the newest hardware, runs complete circles around it. Heck even Nvenc on Maxwell is better than AMD in some instances.

[Mister XY]

Ok then I know that the Ryzen is not good. Then I ask the question, what is the best APU / GPU for hardware encoding in x265 format?

[Yups]

CBR/VBR= Turing/Ampere
CQP= Iris Xe


Nivida has a big advantage with Lookahead in CBR/VBR mode but overall CQP offers best quality on Iris Xe.

[Mister XY]

That means that I currently have the best hardware for encoding because I don't use cbr or vbr.

[Yups]

It could be yes, although it's probably much slower than Iris Xe unless it's running in low power mode. I mean you can try and upload a sample, if you tell me the settings I can check out if it's the same. This or this you can use.

[Mister XY]

How do you check the vmaf?

[Yups]

I don't know. I'm using Video Quality Measurement Tool which isn't free. If the file size is identical there is no need for a quality metrics check.

[Mister XY]

OK, what for a sample do you need? A sample from surce ir from encode?

[Yups]

I need the encoded sample and settings you were using and driver version. If it's a known source for me I don't need that, so it depends.

[Yups]

Posting it here because some people might be interested. We made a comparison with the exact same settings between TGL-U Iris Xe and RKL-S UHD 750. It's a CQP best quality setting and software decoding.


File size/bitrate:

Iris Xe= 494.834 KB/8307.92 kbps
UHD750= 494.837 KB/8307.90 kbps


VMAF:

Iris Xe= 97.358
UHD 750= 97.358


Very minor file size/bitrate difference and same quality. From this I can say it's the same encoder which was expected but good to know it's the same. I was thinking the minor bitrate difference is decoding related. Another run with hardware decoding:


Iris Xe= 493.277 Kb
UHD 750= 493.286 Kb

Minor size difference as well. Iris Xe has two decoder unlike UHD750, this minor size difference could still related to decoding somehow. Doesn't matter in the end, same quality. Speed difference wasn't that big by the way.

[Yups]

From the release notes of Intels latest driver:

Support for H264 and HEVC DX12 video encode on Microsoft Windows® 11 for 11th Generation Intel® Core™ Processors.

https://downloadmirror.intel.com/648...s_100.9864.pdf

What is DX12 video encode and why Windows 11 only?

[nevcairiel]

Windows 11 adds a encoding API to DX12, which would be interesting as a cross-vendor way to access video encoding hardware, but the documentation on it seems to still be very much work in progress, so we'll see how usable that is once someone figures out how to use it.

[Balling]

Originally Posted by Yups

From the release notes of Intels latest driver:


https://downloadmirror.intel.com/648...s_100.9864.pdf

What is DX12 video encode and why Windows 11 only?

dx11va is old. directx11over12 decoder will allow to do dx12 only and already works in Chrome under a flag.

[Yups]

Originally Posted by nevcairiel

Windows 11 adds a encoding API to DX12, which would be interesting as a cross-vendor way to access video encoding hardware, but the documentation on it seems to still be very much work in progress, so we'll see how usable that is once someone figures out how to use it.

Microsoft released it, there is a blog post: https://devblogs.microsoft.com/direc...ideo-encoding/

And on github: https://github.com/microsoft/DirectX...deoEncoding.md

[tonemapped]

Originally Posted by Balling

dx11va is old. directx11over12 decoder will allow to do dx12 only and already works in Chrome under a flag.

Chrome barely operates correctly with AV1 One of the recent updates changed my flag and decided my Atom-powered HTPC would love 4K AV1