Evaluation of HEVC decoders (SW, Hybrid and HW)

[wanezhiling]

I just need a GT3005 card.

[chros]

Or 3000.01

[NikosD]

Has anyone kept a recent copy of MS HEVC Video Extension decoder or know a way to download it for free ?

Recent changes to MS policy prohibit free download of the HEVC decoder, even from the device manufacturer page:
https://www.microsoft.com/en-us/p/he...ot:overviewtab

[Klaus1189]

I am not sure, but I think I found it

[NikosD]

It works like a charm, thank you!

[wanezhiling]

who has 8k hevc 8-bit 60p clips?

[VictorLS]

Originally Posted by wanezhiling

who has 8k hevc 8-bit 60p clips?

I have not - I have just 4K H265 60fps 8bit
But if you really need 8K H265 60fps 8bit do it by yourself

[littleD]

Interesting. Vulkan +Video hardware Acceleration.
https://www.phoronix.com/scan.php?pa...ovisional-Spec

[wanezhiling]

DXVA Checker 4.5.2

Version 4.5.2 (04/17/2021)
Fixed incorrect parameters when blitting in DXVA2 Video Processor under specific situations

(this)

[littleD]

https://www.saschawillems.de/blog/20...3.01-released/

This version also adds support for the video decode and encode queue family flags that have been introduced with the provisional Vulkan Video acceleration extensions.

[nevcairiel]

Its important to note that Vulkan video acceleration currently only supports H264 and HEVC, so it still has ways to go to become even remotely viable by supporting a much wider variety of codecs that we all expect by now.

[pureocean]

The display times of subtitle lines don't usually occur in keyframes.

I can't read subtitle lines fast. I get back frequently when playback. When I jump to the previous/next line of the subtitle (HOME+END key in PotPlayer / CTRL+Left/Right Arrow key in mpv), I cannot tolerate a little lag of the frame refresh. Because of this reason I always turn off H/W (DXVA) for H264 decoding, which it causes the image to be slow displayed in Radeon R7 240.

Which of the both cards below that support H/W 1080p 10-bit HEVC decoding does the least latency when seeking non-keyframe, even if DXVA2/D3D11 is on?

Is GeForce GT 1030 or Radeon RX 550?

[huhn]

i can't remember anyone doing seek tests but polaris cards can barely do 60 FPS UHD meaning the nvidia cards are massively faster in terms of decoding but and here we go yet again i can remember a 1030 test and the Vram of that card can be a problem for real world playback.

if you want the fastest seeks a better CPU is what you want.

[Asmodian]

The DDR4 or GDDR5 GT 1030? If you do get a GT 1030 make sure it is not the DDR4 one, the memory is simply too slow for great hardware decoding (or great anything). Most listings do mention the type of memory used.

I agree with huhn, a faster CPU with software decoding is better for seeking.

Originally Posted by nevcairiel

supporting a much wider variety of codecs that we all expect by now.

[pureocean]

@huhn and @Asmodian,

Thank you both for your informations and advices.

I upgraded my old CPU (Phenom II X3) to Ryzen 5 3600 last summer. The non-keyframe seeking performance has really improved.

On my old CPU, non-keyframe seeking performance of FFMpeg-based decoders (LAV and MPC-BE's MPCVideoDec) was not good. That's why I was using Lentoid HEVC Decoder. I easily use LAV and MPCVideoDec on the Ryzen 5 3600. Moreover, in combination with MPC VideoRenderer and Bluesky Frame Rate Converter.

Actually, my R7 240 is still enough for me. Recently I removed the fan jumper (noising). But the card came overheating when playing 10-bit HEVC 1080p. I replaced the fan. Also flashed the lastest VBIOS.

AMD's Oland (GNC1.0 series, UVD 4) lacks H/W 10-bit support. My goal to use DXVA2 / D3D11 in both H264 and HEVC without lag when non-keyframe seeking.

If I buy a new card, I will prefer GT 1030 (Of course, GDDR5 is very important. MPN Model: V809-2498R, GTIN/EAN: 4719072520113).

Also, Nvidia pays more attention to video codec decoding and encoding. They have documentation listing supported models for this.

https://developer.nvidia.com/video-e...ort-matrix-new
https://docs.nvidia.com/video-techno...lication-note/
https://developer.nvidia.com/nvidia-video-codec-sdk
https://developer.nvidia.com/blog/nv...scoding-guide/

They even recently added the Vulkan Video Hardware Acceleration mentioned here to the GT 1030.

If I buy Geforce, I will be deprived of AMD's Fluid Motion but there are alternatives (madVR, SVP).

[mariner]

Greetings.

8K AV1: Intel Iris XE or UHD 750?

1. The built-in IRIS XE GPU of Tiger Lake 1165G7 has added support for 8K AV1 decoding. While decoder performance suggests it could handle it, playback performance struggled at 50fps. Does anyone have success with this? Would faster/more ram help? Memory used is 16GB 2666MHz DDR4.

2. Does the UHD 750 GPU have AV1 support? Would it perform better?

3. What about AMD GPU?

Thanks and best regards,

[v0lt]

Originally Posted by mariner

2. Does the UHD 750 GPU have AV1 support? Would it perform better?

Intel UHD 750 supports AV1 decoding.
The adapter plays 4k AV1 10-bit HDR 60fps from YouTube stably.
I don't need 8k.

[clsid]

When support for a higher resolution gets added in a GPU decoder it is usually just 30 fps. Later generation then improves performance further to support 60 fps.

I doubt you will find 8k60 content beyond demo stuff. So who cares.

[mariner]

8K/60p AV1 HDR YT video: more testing with Iris XE Graphics

Thanks for the kind reply, v0lt and clsid.

1. While DXVAchecker struggled with 8K AV1 video, w10 built-in movies player handled it beautifully with 90% GPU usage. As the decoder used by both is presumably the same, does anyone have any insight how w10 managed this?

2. Potplayer's AV1 decoder could handle 4K AV1 video, but struggled at 8K.

3. LAV filters could not deal with even the 4K version as it doesn't seem to have AV1 decoding capability. As I'm new to using w10 for video playback, would appreciate any advice setting up the filter: Should DXVA2(native) or D3D11/Intel Iris XE Graphics be selected?

4. Any idea if UHD 750/770 would offer similar w10 performance?

5. What about RYZEN CPU?

Thanks and best regards,

[v0lt]

Originally Posted by mariner

1. While DXVAchecker struggled with 8K AV1 video, w10 built-in movies player handled it beautifully with 90% GPU usage. As the decoder used by both is presumably the same, does anyone have any insight how w10 managed this?

1. What file did you play? (only a file and not a stream from the network)
2. Is it 8-bit or 10-bit?
3. How did you check the output frame rate?