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Old 10th September 2022, 11:21   #2461  |  Link
LigH
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Old 16th September 2022, 18:06   #2462  |  Link
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Originally Posted by rwill View Post
Oops I did not see the reply.

I agree for normal shot content but the R/D graph I meant was for captured video game content. So most likely no motion blur + hard edges/contrast + small detail. My guess is that it requires a ~80% increase in rate to keep the same quality when doubling the frame rate. The only thing I can see it saving is motion vector length really.
That said, there can be a lot of static elements on-screen in a game, depending on the time. The HUD and GUI, for example. Also, since any temporal errors last only half as long when frame rate doubles, one can get away with somewhat higher QPs.
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Old 16th September 2022, 18:09   #2463  |  Link
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I was a little surprised by how little discussion of AV1 there was at IBC this year. Support was mentioned here and there, but I certainly saw a lot more VVC demos, and discussion of real-world VVC products.

8K talk was also quite muted, and VR/AR wasn't as prominent either. Sustainability was talked about way more than ever before, as Europe faces a winter energy crisis due to Russia this winter.
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Old 20th September 2022, 16:32   #2464  |  Link
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https://nvidianews.nvidia.com/news/n...-rtx-40-series

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Dual NVIDIA Encoders (NVENC) cut export times by up to half and feature AV1 support. The NVENC AV1 encode is being adopted by OBS, Blackmagic Design DaVinci Resolve, Discord and more.
https://www.nvidia.com/en-us/geforce...tent-creation/

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GeForce RTX 40 Series graphics cards feature our eighth generation NVIDIA video encoder, NVENC for short, now with support for AV1.

For livestreamers, the new AV1 encoder delivers 40% better efficiency. This means livestreams will appear as if bandwidth was increased by 40% — a big boost in image quality. AV1 also adds support for advanced features like high dynamic range.
https://developer.nvidia.com/nvidia-video-codec-sdk

Quote:
Introducing AV1 encoding with Video Codec SDK 12.0 on NVIDIA’s Ada architecture. AV1 is the state of the art video coding format that supports higher quality with better performance compared to H.264 and HEVC. On Ada, multiple NVENC coupled with AV1 enables encoding 8k video at 60fps alongside a higher number of concurrent sessions.
For livestreamers, the new AV1 encoder delivers 40% better efficiency. This means livestreams will appear as if bandwidth was increased by 40% — a big boost in image quality. AV1 also adds support for advanced features like high dynamic range.

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Old 20th September 2022, 18:13   #2465  |  Link
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Big news! Sounds like it has a lot of great stuff for gamers and content creators.

I wish claims like "For livestreamers, the new AV1 encoder delivers 40% better efficiency." would specify "compared to." ! If it is only 40% over AVC, that's a bit underwhelming. There's lots of good tools in AV1 for encoding game content that probably aren't being used by the hardware.
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Old 20th September 2022, 20:50   #2466  |  Link
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For livestreamers, the new AV1 encoder delivers 40% better efficiency.

It sounds like it's compared to h264 because livestreamers are using/have to use h264.
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Old 21st September 2022, 06:49   #2467  |  Link
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The 40% is a comparison against H264 at 1080p, since that what majority of streaming is using right now, and what they hope to push AV1 into, since HEVC never took off in that space.
Higher resolutions would of course benefit more, but due to H264 still being prevalent there, it was not used often. Maybe that'll change when modern codecs take over?

Of course streaming is a special use-case for encoding wanting extra low latency, which precludes some features, and hardware encoding also tends to avoid some features that are not well suited to hardware processing. But 40% improvements for streaming should still be quite nice.
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Old 22nd September 2022, 01:20   #2468  |  Link
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Originally Posted by nevcairiel View Post
The 40% is a comparison against H264 at 1080p, since that what majority of streaming is using right now, and what they hope to push AV1 into, since HEVC never took off in that space.

Higher resolutions would of course benefit more, but due to H264 still being prevalent there, it was not used often. Maybe that'll change when modern codecs take over?
I think H.264 remained the standard as it was the one universally compatible codec. Using anything else for upload means the ingest stream needs to be reencoded for some customers. Which can be a good thing if the reencode still looks better due to a higher quality source. More advanced codecs have tools not in H.264 that can really help for gaming style content. Variable partition sizes is big. Transform Skip can be a big help for really sharp lines and text. Tiles to break HUD from 3D viewport for faster encoding. SAO in HEVC can be very effective in reducing ringing from sharp details at high QP.

Quote:
Of course streaming is a special use-case for encoding wanting extra low latency, which precludes some features, and hardware encoding also tends to avoid some features that are not well suited to hardware processing. But 40% improvements for streaming should still be quite nice.
And 40% would be just the start, I think.
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Old 22nd September 2022, 14:49   #2469  |  Link
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Originally Posted by Mr_Khyron View Post
SSIM Comparison for Intel Arc A380 QSV
https://rigaya34589.blog.fc2.com/blog-entry-1501.html

Update with gop-ref-dist 4: https://twitter.com/rigaya34589/stat...32789628186627

Quality is quite a bit better now.
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Old 23rd September 2022, 08:45   #2470  |  Link
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https://aomedia.googlesource.com/aom/+/refs/tags/v3.5.0
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Old 27th September 2022, 19:01   #2471  |  Link
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https://www.intel.com/content/www/us...raphics/7.html
https://www.intel.com/content/www/us...fications.html
https://www.intel.com/content/www/us...fications.html
https://www.intel.com/content/www/us...fications.html

https://www.intel.com/content/www/us...raphics/3.html
https://www.intel.com/content/www/us...fications.html

Intel announced the Arc A770 and A750 today and quietly put the A310 specs on their website, all have AV1 hardware decoding and hardware encoding.
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Old 28th October 2022, 12:17   #2472  |  Link
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Old 1st November 2022, 07:42   #2473  |  Link
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https://github.com/obsproject/obs-studio/releases

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Added NVENC AV1 hardware encoder on Windows
OBS Studio 28.1 released.
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Old 6th November 2022, 11:32   #2474  |  Link
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https://git.ffmpeg.org/gitweb/ffmpeg...0cb634790e751f

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avcodec/nvenc: add AV1 encoding support
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Old 10th November 2022, 09:52   #2475  |  Link
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https://developer.nvidia.com/nvidia-...c-sdk/download

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Support for AV1 encoding on NVIDIA Ada Lovelace architecture.
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