"Enhanced Broadcasting beta testers will be able to experiment with higher-input bit rates, up to 4K resolutions, up to 5 concurrent streams, as well as new codecs. The new codecs include the latest-generation AV1 for GeForce RTX 40 Series GPUs, which provides 40% more encoding efficiency than H.264, and HEVC for previous-generation GeForce GPUs.
To simplify set up, Enhanced Broadcasting will automatically configure all OBS encoder settings, including resolution, bit rate and encoding parameters. A server-side algorithm will return the best possible configuration for OBS Studio based on the streamer’s setup, taking the headaches out of tuning settings for the best viewer experiences.
Using the dedicated NVENC hardware encoder, streamers can achieve the highest quality video across streaming bitrates, with minimal impact to app and game performance.
Sign up for the Twitch Enhanced Broadcasting beta today at twitch.tv/broadcast. Twitch will enroll participants on a first-come, first-served basis, starting later this month"