For a stable 24/7 YouTube stream from OBS, use an NVIDIA NVENC encoder your GPU supports, H.264 over RTMPS for a straightforward SDR setup, CBR, a two-second keyframe interval, and a bitrate matched to YouTube’s live-ingest table. Then test the actual scene and audio, leave upload headroom, and monitor the stream. No single preset guarantees uninterrupted operation: the right settings depend on the GPU, OBS build, codec, output, scene load, and network.
Set up NVENC in OBS for YouTube Live
NVENC is NVIDIA’s dedicated hardware video encoder, which can take encoding work off the CPU. The codecs available depend on the GPU generation and the installed OBS build, so first confirm what your system exposes rather than assuming it supports H.264, HEVC, or AV1. OBS labels can also vary by release.
- Choose the encoder. In OBS, open Settings → Output, select the output mode and streaming encoder, and choose an NVIDIA NVENC option available on your system. If no NVENC option appears, check that the GPU and driver are recognized and that OBS can access the encoder.
- Choose a live-ingest protocol and codec. YouTube lists H.264, H.265/HEVC, and AV1 for RTMP/RTMPS encoder streams and recommends RTMPS. For a simple SDR starting point, use H.264 over RTMPS. The best codec depends on what the GPU and ingest workflow support.
- Set rate control and keyframes. Use CBR and set the keyframe interval to 2 seconds. YouTube allows a maximum interval of four seconds; its two-second recommendation is the better starting point.
- Set the bitrate. Use the YouTube live bitrate table below for the selected codec, output resolution, and frame rate. These are recommendations for encoder ingest, not proof that your connection can sustain the rate.
- Set frame structure and audio. YouTube’s advanced live settings list progressive scan, two B-frames, one reference frame, CABAC, and square pixels. For stereo audio, use AAC or MP3 at 128 kbps. For SDR, YouTube lists Rec. 709 and 8-bit video.
- Select a sustainable NVENC preset. NVIDIA’s OBS broadcasting guide uses P6 (slower/better quality) as a starting point and enables Look-ahead and Psycho Visual Tuning. Treat these as vendor starting recommendations, not a guarantee for every system. Look-ahead uses CUDA; NVIDIA advises disabling it if GPU utilization is high. If OBS shows encoder overload or rendering lag, reduce GPU demands or choose a less demanding configuration.
- Test before leaving the stream unattended. Preview before going live and test with representative movement and audio. Check YouTube’s stream health and messages. For a continuous stream, extend the test long enough to check network stability, temperatures, power, scene recovery, and restart behavior; those are practical operational checks, not a YouTube-prescribed 24/7 runbook.
Choose a live bitrate by resolution and frame rate
The following are YouTube’s recommended live encoder bitrates; the live table may change, so verify it when configuring the stream. Select the row for the codec, resolution, and frame rate you actually use.
| Output | AV1 or HEVC | H.264 |
|---|---|---|
| 1080p30 | 10 Mbps | 14 Mbps |
| 1080p60 | 12 Mbps | 17 Mbps |
| 1440p30 | 15 Mbps | 21 Mbps |
| 1440p60 | 24 Mbps | 34 Mbps |
| 2160p30 | 30 Mbps | 42 Mbps |
| 2160p60 | 35 Mbps | 50 Mbps |
For example, YouTube recommends 17 Mbps for H.264 at 1080p60 and 34 Mbps for H.264 at 1440p60. These figures are not a substitute for an upload speed test or a stability test. YouTube recommends leaving 20% upload-bandwidth headroom above the total stream bitrate. If you are sending a primary and backup stream, account for both when sizing outbound capacity.
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Make the configuration sustainable around the clock
A 24/7 stream is a system, not just an encoder preset. YouTube’s live tips recommend testing failover, monitoring audio and video quality, and verifying that an event is accessible. For an unattended setup, also check the conditions that can interrupt a long run:
- GPU headroom: Watch OBS rendering and encoding indicators during the busiest scene. A preset that works on a static screen may fail when scene complexity or GPU load rises.
- Upload stability: Run a speed test, then monitor the stream under sustained load. Available upload speed can vary; do not treat a brief peak as guaranteed capacity.
- Cooling and power: Confirm that the system stays within normal operating conditions during a long test and that power interruptions are addressed for your setup.
- Recovery: Test how OBS, the network, and the stream behave after a restart or interruption. Do not assume recovery without observing it.
- Monitoring: Keep an eye on YouTube stream health and messages, as well as the actual audio and video. If you record a local archive, verify the files.
YouTube does not publish a single configuration validated specifically for every 24/7 NVIDIA setup. A long-duration test on the target GPU, scene, network, and power arrangement is therefore essential; it reduces risk but cannot guarantee uninterrupted uptime.
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H.264, HEVC, AV1, and HDR: which path fits?
SDR: start with a supported, stable workflow
For a straightforward SDR stream, H.264 over RTMPS is a broadly supported starting point. YouTube also lists HEVC and AV1 for encoder streams, but codec availability depends on the GPU generation and OBS build. Compare the codecs your setup actually offers, then match bitrate to YouTube’s live table and test the complete system.
HDR: use a separate configuration
Do not apply the SDR H.264 recipe to HDR. YouTube’s HDR instructions call for HEVC, 10-bit video, compatible BT.2020 color primaries and matrix, and PQ or HLG transfer characteristics. Its documented OBS workflow uses a hardware HEVC encoder, Main 10 profile, P010 color format, and Rec. 2100 PQ or HLG. HDR ingest requirements depend on the selected workflow: YouTube documents requirements for HLS and also describes RTMP(S) HDR support with stream-key settings. Check YouTube’s HDR instructions for that workflow. YouTube lists OBS 30.1 as the minimum for its documented RTMPS HDR workflow.
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Troubleshoot common NVENC and live-stream problems
NVENC is missing from OBS
OBS only offers encoders exposed by the installed build and recognized hardware. Confirm that the NVIDIA GPU and driver are available to OBS, then check the encoder list again. Codec availability varies by GPU generation; do not assume every NVENC-capable GPU supports every listed codec.
OBS reports encoding or rendering lag
This points to a system that cannot sustain the current workload. Check GPU utilization and scene complexity; disable CUDA-accelerated Look-ahead if GPU utilization is high, as NVIDIA advises. Then reduce the preset’s demands or other GPU load and retest using the real scene. A high-quality preset is useful only if the system remains stable.
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YouTube reports poor stream health or dropped frames
Check that the chosen bitrate matches the actual codec, resolution, and frame rate, and that total outbound stream bitrate fits the available upload capacity with headroom. Run an upload speed test and monitor stability during a representative test. Inspect YouTube’s stream-health messages before changing multiple settings at once.
The stream works briefly but fails during a long run
Re-test under sustained load and inspect the network, GPU load, cooling, power, and restart behavior. A short preview cannot establish 24/7 stability. Verify failover and recovery rather than assuming they work.
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Or let it run in the cloud
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