Selur's Little Message Board

I want to archive my video files from GoPro camera using AV1 format. 
I have Geforce 5060ti and want to use NVENC as I heard that version supports B-Frames in AV1. I did a few tests with most recent version of Hybrid, however I didn't see any B-frames in encoded AV1 files (using NVECN)

Is there any option I need to activate to add B-frames?

Thanks

As far as I can tell Hybrid is telling NVEncC to use '--bframes 3' by default. (assuming 'NVEncC --check-features' reported that you gpu supports using b-frames)
Looking at the output of the encoder in my quick test:
the encoder git get the information.

From what I remember AV1 does not have b-frames to begin with and the 'b-frame' option in some encoders just referes to a specific combination of interframes referencing each other.

Quote:AV1 does have bi-directional predicted frames, but it is not like the way as H.264/HEVC. Instead it has so-called "mini-GOP", which includes series of inter frames that reference each other.

Because of this difference, it is not counted as B frames in the log.

=> https://github.com/rigaya/NVEnc/issues/438

Cu Selur

Cu Selur

Thanks for a reply. 

I'm not expert on that topic. I just read that B-frames are supported for NVENC AV1 on 5000 series card and did a test. I didn't see any B frames in the output but maybe that is OK. I don't know....
When I look at the output of NVENC H.265 I can simply see B-frames.... 

I'm using Shutter Encoder option to "see" GOP

H.265 and AV-1 are totally different formats,..
(shutter encoder is based on ffmpeg)

(24.07.2025, 19:18)Selur Wrote: [ -> ]H.265 and AV-1 are totally different formats,..

I know, but even NVIDIA is showing "B-Frames" in the settings of OBS for NVENC AV1 (bottom of the image)
NVIDIA NVENC Obs Guide | GeForce News | NVIDIA

It is all quite confusing....
I just want to be sure that I'm using best available settings for my hardware. 
Thanks 

(24.07.2025, 19:18)Selur Wrote: [ -> ]H.265 and AV-1 are totally different formats,..
(shutter encoder is based on ffmpeg)

---

NVIDIA says about "...ultra-high quality (UHQ) mode to AV1..." but TBH I don't know what it means.....

Video Codec SDK | NVIDIA Developer

Quote:NVIDIA GPUs contain an on-chip hardware-accelerated video encoder (NVENC), which provides video encoding for H.264, HEVC (H.265) and AV1 codecs.

The software enhancements in SDK v13.0 enable extending ultra-high quality (UHQ) mode to AV1 encoding.. This makes AV1 encoding on Blackwell NVENC comparable to software AV1 encoding with ~3X throughput. The UHQ HEVC mode was introduced in the SDK v12.2 in the Ada generation.

Can't really say what settings to use another tool, which might use different language.
Nor sure whether cqp should is constant or constrained and if q stands for quality or quantizer.

NVEncC uses a different naming, see: https://github.com/rigaya/NVEnc/blob/mas...de-options

Quote:Professional-Grade Video for All
GeForce RTX 50 Series GPUs deliver a generational leap in NVIDIA encoders and decoders with support for the 4:2:2 pro-grade color format, multiview-HEVC (MV-HEVC) for 3D and virtual reality (VR) video, and the new AV1 Ultra High Quality mode.

GeForce RTX 50 Series GPUs Double Creative Performance | NVIDIA Blog

What is that " AV1 Ultra High Quality mode" and can I activate it in Hybrid?

No clue what it actually does.
Since NVEncC doesn't mention it, Hybrid doesn't support it.
=> if you want it, you probably best should post a feature request over at https://github.com/rigaya/NVEnc/issues
If rigaya adds it to NVEncC I'll add support for it in Hybrid.

Cu Selur

Ps.: I added a question regarding UHQ to https://github.com/rigaya/NVEnc/issues/709

UHQ is the same as using:
see: https://github.com/rigaya/NVEnc/issues/6...2746007405

Cu Selur