To launch OBS at Windows sign-in and start a 4K/60 YouTube broadcast, configure OBS for 3840×2160 at 60 fps, set a supported encoder and YouTube-compatible bitrate, then add an OBS shortcut to Windows Startup with --startstreaming. In YouTube Studio, enable auto-start for the stream if you want the encoder to trigger the broadcast. Test the full setup before relying on it: opening OBS and successfully sending a stable 4K feed are separate things.
Before you configure automatic startup
You need an activated YouTube Live account, an OBS profile with the correct scene and stream key, and a PC and internet connection that can sustain your chosen encoder settings. YouTube says first-time live streaming activation may take up to 24 hours. Create or select the stream in YouTube Studio’s Live Control Room and copy its stream URL and stream key into OBS. Treat the key like a password: anyone who has it may be able to send video to your channel. Reset it in Studio if it is exposed. YouTube’s stream-key guidance explains the connection between the encoder and the live stream.
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Decide what “launch a stream” should mean for your channel. Adding OBS to Startup opens the program at sign-in; it does not, by itself, guarantee the broadcast begins. OBS’s --startstreaming launch parameter requests that OBS start streaming, while YouTube’s auto-start setting controls whether an incoming encoder feed starts the broadcast. Configure both only if you want sign-in to trigger a live broadcast.
Set OBS for YouTube Live at 4K and 60 fps
Set the output resolution and frame rate
- Open OBS and choose Settings > Video.
- Set Output (Scaled) Resolution to
3840×2160. Set Common FPS Values to60. - Check that your sources and canvas are composed for 16:9 4K output. If the source is lower resolution, OBS can scale it, but that does not create detail that was not in the source.
OBS notes that output resolution determines what the stream sends and that 60-fps streaming can place significant load on a system. The Windows baseline requirements (Windows 10 or 11 and a DirectX 10.1-compatible GPU) do not guarantee a particular computer can encode a complex 4K/60 scene smoothly. Hardware, encoder generation, scene complexity, and upload stability all matter. See OBS system requirements and OBS encoding performance guidance.
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Choose an encoder and bitrate for the codec
Go to Settings > Output and select an encoder available on your PC. When supported by the installed hardware and drivers, OBS recommends hardware encoding because it moves encoding work from the CPU to a dedicated component. OBS supports options such as NVIDIA NVENC, AMD AMF, and Intel Quick Sync on compatible systems; older encoder generations can deliver lower image quality at the same bitrate. Use OBS’s Auto-Configuration Wizard as a starting point, not as proof the final setup is stable.
YouTube’s listed 2160p/60 ingest guidance varies by codec. The figures below are YouTube’s minimum and recommended bitrates; they are not a promise that your internet connection or PC can sustain the stream. Choose a bitrate that your upload connection can maintain with headroom, then test and watch YouTube’s stream health.
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| Video codec | YouTube listed minimum | YouTube recommended bitrate |
|---|---|---|
| AV1 or H.265 (HEVC) | 10 Mbps | 35 Mbps |
| H.264 | 14 Mbps | 50 Mbps |
These are YouTube’s 4K/2160p at 60 fps figures; the help page does not state a publication year. H.264 may be the available choice on some systems, while newer compatible hardware may expose AV1 or HEVC. Pick only a codec that your OBS installation and PC support and that YouTube accepts for your stream. Refer to YouTube’s encoder settings and bitrate guidance.
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- Protocol: Use RTMPS where available; YouTube recommends it. RTMP/RTMPS are the listed streaming protocols.
- Rate control: Use CBR, as YouTube’s guidance specifies.
- Keyframes: Set a two-second keyframe interval; YouTube says not to exceed four seconds.
- Video format: Use progressive scan and square pixels. For SDR, YouTube’s general advanced settings specify Rec. 709 and 8-bit.
- B-frames: YouTube’s general advanced guidance lists two. Match the option exposed by your encoder.
- Audio: Use AAC. YouTube lists 44.1 kHz for stereo and 48 kHz for 5.1 audio.
Names and availability differ by encoder in OBS, so apply the equivalent setting where possible rather than assuming every PC exposes the same controls. YouTube sets 4K streams to normal latency; its low-latency optimization option is not available at 4K. The protocol and format details are in YouTube’s encoder settings guidance.
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Add OBS to Windows sign-in startup
Use the Startup folder for a straightforward setup
- In Windows 10 or 11, first check Settings > Apps > Startup or Task Manager > Startup apps to see whether OBS is listed.
- If it is not listed, press Windows key + R, enter
shell:startup, and press Enter. This opens your per-user Startup folder. - Create a shortcut to OBS in that folder. A typical executable is
obs64.exe, but its location depends on how OBS was installed. If needed, locate the existing OBS shortcut, open its file location, and use the executable’s actual path. - Right-click the shortcut, select Properties, and edit Target. After the closing quote around the executable path, add a space and
--startstreaming. For example:"C:Program Filesobs-studiobin64bitobs64.exe" --startstreaming. - In the same shortcut properties, set Start in to the folder containing
obs64.exe. This is particularly important for automated launching.
The example path is illustrative: use the path on your PC. The per-user Startup folder runs when that Windows user signs in; shell:common startup opens the all-users Startup folder. Microsoft documents these options for Windows 10 and 11 in its startup-app instructions.
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A logon task can be useful if you need a delay or other task conditions. In Task Scheduler, create a task with a At log on trigger and an action that starts the OBS executable; provide --startstreaming as the argument and set the working directory to the folder containing obs64.exe. Configure the task for the signed-in user’s interactive session so the visible OBS application can use the desktop. Do not assume a GUI app will behave normally in a non-interactive session. See Microsoft’s Task Scheduler trigger documentation and OBS’s launch parameter instructions.
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Set YouTube’s auto-start behavior deliberately
In YouTube Studio’s Live Control Room, check the settings for the specific stream you intend OBS to send to. Enable auto-start if an arriving encoder feed should start the broadcast without a separate start action in Studio. OBS’s --startstreaming flag starts OBS streaming on launch; YouTube’s stream setting determines how the receiving broadcast responds. Confirm the selected OBS profile, scene collection, stream key, and destination before enabling unattended startup. YouTube explains the encoder and stream-key relationship in its stream settings help.
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- Run a representative test with the same kind of motion and audio as the intended broadcast. YouTube explicitly recommends testing before going live.
- Sign out and back in, or restart Windows when convenient, and confirm the intended OBS profile and scene load.
- Check that OBS connects to the intended YouTube stream and that the broadcast starts only if that is what you configured.
- In YouTube Studio, verify the incoming feed is 2160p60, audio is present, and stream health shows no persistent connection or encoding problems.
- Observe CPU/GPU load, dropped frames, and bitrate stability in OBS during the test. If performance is poor, reduce scene complexity or choose a less demanding resolution/frame rate or encoder setting before relying on unattended operation.
Keep the first real run supervised. A successful Windows login proves only that the app opened; it does not establish that the PC, upload connection, encoder, and YouTube ingest will remain healthy. YouTube advises monitoring stream health and messages during the event. See its testing and stream-health guidance.
Troubleshoot common startup and stream failures
| Symptom | Likely cause | What to check |
|---|---|---|
| OBS opens, but the stream does not start | The shortcut lacks --startstreaming, or OBS cannot use the intended profile or stream key. |
Check the shortcut Target, active OBS profile, stream destination, and key. Confirm YouTube auto-start if you expect the broadcast to begin on encoder connection. |
| OBS does not open at sign-in | The shortcut is missing, disabled, points to the wrong executable, or the task is not configured for the expected user/session. | Check Windows Startup apps, the folder opened with shell:startup, the executable path, and any Task Scheduler trigger and account settings. |
| OBS launches but reports an encoder or rendering problem | The selected encoder may not be supported by the installed GPU/driver, or the scene and 4K/60 workload may exceed system capacity. | Choose an encoder actually available on the PC, update or verify the relevant graphics driver, then test with a simpler scene or lower output load. |
| YouTube reports unstable or poor stream health | The upload connection may not sustain the configured bitrate, or the encoder output may not match YouTube’s ingest guidance. | Check codec-specific bitrate, CBR, keyframe interval, network stability, and YouTube’s live health messages. Test with headroom rather than targeting the full measured upload rate. |
| The stream appears at a lower quality than expected | The output resolution, frame rate, source, or incoming encoder settings may not be 2160p60. | Recheck OBS Settings > Video, the source and canvas, and the incoming resolution and frame rate shown in Studio. |
| Broadcast starts when you did not intend it to | The shortcut’s launch parameter and YouTube auto-start behavior together can make startup trigger a broadcast. | Remove --startstreaming if you only want OBS open at sign-in, and review auto-start for that YouTube stream. |
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