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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallTo loop a video in OBS while streaming it continuously to YouTube, add the file as a Media Source, enable Loop, select an available NVIDIA NVENC encoder in OBS, and connect OBS to a YouTube stream URL and key. The loop repeats the video; it does not by itself keep a YouTube broadcast connected, so you must also monitor the stream.
What you need before you start
- OBS Studio and a local video file to loop.
- A computer with supported NVIDIA hardware and drivers that expose NVENC to OBS. OBS lists GeForce 750 Ti or GeForce 900-series (Maxwell) and higher as its compatibility baseline on Windows and Linux; this is a baseline, not a guarantee that every codec or configuration will be available. See the OBS hardware encoding guide.
- A YouTube channel that can livestream, plus the stream URL and stream key from YouTube Live Control Room. See YouTube’s encoder setup instructions.
- A stable upload connection that can sustain the bitrate you choose.
Update your NVIDIA drivers if needed, then check OBS’s encoder dropdown on the actual machine. If no NVIDIA NVENC option appears, OBS cannot use NVENC in the current setup; check hardware, drivers, and OBS availability before planning around it.
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Loop one video in OBS
- In OBS, select the scene you intend to broadcast.
- In the Sources panel, click + and choose Media Source.
- Create a source or select an existing one. Enable Local File, then browse to and select the video.
- Turn on Loop in the source properties and click OK. OBS restarts the file after playback completes.
- Check the preview, framing, and audio. Start playback and let it reach the end once to confirm it returns to the beginning as expected.
OBS lists supported Media Source formats including MP4, TS, MOV, FLV, MKV, AVI, GIF, and WebM. A file extension alone does not guarantee that a particular file will play correctly, so check it in the OBS preview. See OBS Media Sources documentation.
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For multiple clips, add a VLC Video source, build its playlist, and enable Loop Playlist. This source requires VLC to be installed; if you use 64-bit OBS, OBS notes that you need 64-bit VLC. Use Media Source with Loop instead when you only need one file.
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Select NVENC for the live stream
- Open Settings → Output in OBS.
- Set Output Mode to Advanced if you need the detailed streaming controls.
- In the streaming encoder control, choose the NVIDIA NVENC option available on your system. The exact codec choices can differ with the GPU, drivers, operating system, and OBS version.
- Set the stream’s rate control to CBR, then set bitrate and keyframe interval to match YouTube’s ingest guidance and your target resolution and frame rate.
- Apply the settings and check the OBS preview and status before starting the broadcast.
NVENC moves video encoding work to supported NVIDIA hardware. OBS recommends hardware encoding as a way to use a dedicated GPU component, but older hardware encoders can deliver lower image quality than software encoding at the same bitrate. Judge the actual stream quality and system stability rather than assuming a preset will suit every GPU. OBS’s compatibility and general guidance are in its hardware encoding guide.
Choose settings for YouTube ingest
YouTube’s live encoder guidance calls for RTMP or RTMPS, constant bitrate (CBR), and a 2-second keyframe interval; it says the interval should not exceed 4 seconds. It supports H.264, H.265/HEVC, or AV1 video, subject to the ingest configuration and encoder available to you. For stereo audio, YouTube lists AAC or MP3 and recommends 128 Kbps. For SDR video, it specifies Rec. 709 and 8-bit. Consult YouTube’s current live encoder settings and bitrate guidance when configuring your broadcast.
Use a bitrate for your resolution and frame rate
These are YouTube’s recommended ingest bitrates from its current help guidance at the time checked, not guaranteed settings for every connection. Pick a target your encoder and upload connection can sustain reliably.
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| Output | H.264 recommendation | H.265/HEVC or AV1 recommendation |
|---|---|---|
| 1080p at 30 fps | 5 Mbps | 4 Mbps |
| 1080p at 60 fps | 17 Mbps | 12 Mbps |
Do not copy an H.264 bitrate into an HEVC or AV1 setup without checking YouTube’s table for that codec and output. If your connection cannot hold the chosen bitrate steadily, reduce the output target and test again.
Do not copy recording settings into the stream
OBS’s NVENC recording baseline is for recording, not YouTube live ingest. Its Advanced Recording Settings guide gives a Constant QP range of 16–23, keyframe interval 2, P5 preset, High Quality tuning, two-pass quarter-resolution multipass, High profile, Look-ahead off, Adaptive Quantization on, and 2 B-frames. Live streaming instead requires CBR under YouTube’s guidance. Keep recording and streaming controls distinct; see the OBS Advanced Recording Settings guide.
Connect OBS to YouTube and verify the loop
- In YouTube Live Control Room, create or select a stream and obtain its stream URL and stream key. Follow YouTube’s encoder setup guide if you need the exact current Control Room flow.
- In OBS, open Settings → Stream, choose YouTube if offered, and enter or paste the stream URL and key as prompted. Treat the key like a password: do not share it or show it in a recording.
- Start with a test or preview in Live Control Room. Confirm that video and audio arrive, the loop plays as expected, and YouTube reports a healthy incoming stream.
- When ready, start streaming from OBS and continue checking stream health. YouTube recommends testing before going live and monitoring the stream. See YouTube live streaming tips for computers.
A repeated source and an uninterrupted livestream are separate things: the Media Source loop controls file playback, while OBS, the network connection, and YouTube ingest determine whether the live broadcast stays connected.
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Decide whether to make a local recording
YouTube says streams shorter than 12 hours can be automatically archived, but warns that a stream exceeding 12 hours may not be captured at all. If your broadcast will run longer or you need a dependable local copy, enable OBS recording and verify that the file is being written. YouTube’s guidance is in Archive live streams.
OBS recommends MKV for recording resilience: an ungraceful stop is less likely to corrupt the whole file, and OBS can remux the recording to MP4 afterward. A local recording uses storage and may compete for system resources, so test streaming and recording together before relying on both. See the OBS Standard Recording Output guide.
| Workflow | Use it when | Trade-off |
|---|---|---|
| Media Source with Loop | You have one local video file. | Simple setup; its loop setting applies to that source. |
| VLC Video with Loop Playlist | You want several local files to repeat as a playlist. | Requires VLC, with matching 64-bit VLC for 64-bit OBS. |
| Stream only | You need the YouTube broadcast but not a local copy. | Avoids local recording storage and resource use; YouTube may not capture streams longer than 12 hours. |
| Stream plus local MKV recording | The broadcast is long or you need a local archive. | Needs local storage and should be tested for system load. |
Troubleshooting common problems
The video stops instead of starting over
Reopen the Media Source properties and confirm Loop is enabled on the source in the active scene. For multiple clips, confirm the VLC playlist is populated and Loop Playlist is enabled.
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NVENC is missing from the encoder list
OBS is not exposing a supported NVIDIA encoder in the current configuration. Check that the computer has compatible NVIDIA hardware, update its drivers, and confirm OBS can access the GPU. The OBS baseline is GeForce 750 Ti or 900-series (Maxwell) and higher on Windows and Linux; actual codec availability can vary. If the machine does not expose NVENC, choose another available encoder or use a different system.
YouTube does not receive the stream
Check that the stream URL and key match the selected stream in Live Control Room, that the key has not been changed or exposed, and that OBS is actually streaming. Then inspect YouTube’s incoming stream status and network connection. If you replace a compromised key, update OBS with the replacement.
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The broadcast drops or YouTube reports poor stream health
Check upload stability and whether the connection can sustain the selected bitrate. Lower the bitrate or output resolution/frame rate if necessary, then test again. Confirm CBR and a 2-second keyframe interval (never over 4 seconds), and use YouTube’s stream health feedback rather than assuming the Media Source loop is the cause.
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The loop has no sound, or its picture is wrong
Check the source’s playback and audio in OBS before going live; confirm the intended scene is active and inspect source visibility, volume, and framing. Try playing the file through to the loop point in preview so you can catch an incompatible or damaged media file before broadcasting.
The stream is longer than 12 hours
Do not rely on YouTube to create an archive for a stream over 12 hours. Configure a local recording if you need a copy, use MKV, and verify that the file grows during a test. Ensure there is enough disk space and that streaming plus recording remains stable.
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