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Now live streaming at 4K and 60 fps with Nvidia RTX 40 graphics cards.

Now live streaming at 4K and 60 fps with Nvidia RTX 40 graphics cards.

[15:09 Mon,8.May 2023   by ]    

The just released version 29.1 of the popular free streaming tool OBS Studio supports on the new NVIDIA RTX 40 graphics cards the real-time encoding of 4K videos with up to 60 fps to YouTube using the license-free AV1 codec. According to NVIDIA, the AV1 codec is about 40% more efficient than the popular H.264 codec and thus delivers significantly better picture quality or requires less bandwidth at the same quality.


At high resolutions, the advantage of AV1 over H.264 becomes even clearer: with the help of AV1, a bandwidth of 10 Mbps is already sufficient for streaming 4K video at 60 frames per second - H.264, on the other hand, requires rather twice as much, namely 20 Mbps.


AV1 streaming (with 4K) to YouTube via OBS Studio is made possible by the new support of the Enhanced RTMP live streaming protocol, which extends RTMP with the ability to stream via H.265/HEVC, VP9 and AV1 as well as HDR content in addition to H.264. This means that it is now possible to use the live encoding capabilities of the new NVIDIA RTX 40 GPUs in programs that support Enhanced RTMP. These can compress not only H.264 at 4K, H.265 at 8K and 10-bit but also AV1 at 4K in both desktop and mobile versions using the integrated NVENC (NVidia ENCoder) hardware encoder.

Efficiency of AV1 compared to H.264

However, the quality of the streamed videos does not only depend on the codec, but also on the efficiency of the encoder used - according to NVIDIA, the NVENC is supposed to outperform the encoders from AMD and Intel in this respect. There is a separate Guide, which helps to configure the NVENC correctly in OBS Studio. The latest version OBS Studoi 29.1. can be downloaded here - but the support of HDR in live streaming has not been implemented in OBS Studio yet.

Quality comparison of AV1 encoders

NVIDIA is one of the founding members Alliance for Open Media, along with major players such as Amazon, Apple, ARM, Cisco, Facebook, Google, IBM, Intel, Microsoft, Mozilla, and Netflix, who are developing the open source AV1 video codec and released 2018.

Link more infos at bei obsproject.com

deutsche Version dieser Seite: Ab sofort Livestreaming mit 4K und 60 fps mit Nvidia RTX 40 Grafikkarten


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deutsche Version dieser Seite: Ab sofort Livestreaming mit 4K und 60 fps mit Nvidia RTX 40 Grafikkarten

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