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Usually, no. YouTube currently lists AV1 as a supported video codec for RTMP/RTMPS live streams, so an AV1 file does not automatically need conversion before you use it in an OBS workflow. Convert it only if a particular player, editor, OBS encoder or other part of your setup requires H.264—or if you deliberately want to stream using H.264. For a low-end PC, the bigger question is whether it can encode and render your chosen stream settings in real time.
First check whether your workflow accepts AV1
YouTube’s current live encoder guidance lists H.264, H.265/HEVC and AV1 as supported video codecs for RTMP/RTMPS, and OBS’s formats guide covers both AV1 and H.264. That makes H.264 a compatibility option, not a mandatory conversion target for every YouTube stream. Check the codec options shown by your installed OBS build and the encoder you intend to use; available options depend on the system and encoder.
H.264 remains useful when another component in your workflow cannot handle AV1. OBS describes H.264 as its default codec and as broadly playable across devices and software. A container change alone—such as remuxing a file—does not change its video codec. To turn AV1 video into H.264, the video must be decoded and encoded again.
Separate file conversion from live encoding
Converting a recording before streaming is an offline task; encoding an OBS live stream is real-time work. A low-end computer might complete an offline conversion slowly but still struggle to encode, render scenes and send a live stream at the same time. OBS says software AV1 encoding requires a high-end CPU for real-time compression, and notes that CPU demands vary with encoder, resolution, frame rate and scene complexity.
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If your system has a compatible hardware encoder, OBS generally recommends using it for performance: hardware encoding shifts work from the CPU to a specialized GPU component. OBS names NVIDIA NVENC, AMD AMF and Intel Quick Sync Video as possible paths on compatible systems. Do not assume support from a brand or product family alone; check OBS’s encoder menu and confirm your GPU and driver support the option.
Convert AV1 to H.264 only when you need to
Choose a compatible H.264 encoder
Keep the original AV1 file. If you have confirmed that a workflow component requires H.264, choose an H.264 encoder that is actually available on your machine. Hardware availability is system-specific. A software encoder may work, but conversion can take substantial CPU time, especially at higher resolutions or frame rates.
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Match output to your stream and hardware
Pick an output resolution and frame rate your PC can encode reliably and your upload connection can sustain. Re-encoding is lossy, so avoid unnecessary conversion or repeated exports. Decide deliberately how to handle audio, then play the converted file through from start to finish—or at least check representative sections, including the beginning and end—to verify picture, sync and sound before relying on it in a live workflow.
Test the file and the live path
Load the output into the exact player or OBS workflow you plan to use. Check that the expected video and audio tracks appear, that playback is smooth, and that the stream reaches YouTube without encoder or stream-health warnings. YouTube recommends testing with representative audio and movement, monitoring stream health and reviewing messages during the event.
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Set OBS and YouTube for a stable stream
YouTube’s live encoder guidance recommends RTMP/RTMPS, constant bitrate (CBR), and a keyframe interval of two seconds; it says not to exceed four seconds. Its H.264 bitrate recommendations below are platform guidance, not a guarantee that a particular PC or internet connection can sustain the stream.
| Output | YouTube H.264 bitrate recommendation |
|---|---|
| 720p at 30 fps | 8 Mbps |
| 720p at 60 fps | 8 Mbps |
| 1080p at 30 fps | 14 Mbps |
| 1080p at 60 fps | 17 Mbps |
These figures are YouTube’s current live encoder recommendations, accessed 2026-10-03. They are not requirements to use the highest setting: choose a resolution, frame rate and bitrate based on what your system and stable upload bandwidth can handle. YouTube says it transcodes live streams into different output formats for viewers.
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If OBS struggles, reduce the workload
OBS’s performance troubleshooting guidance recommends reducing output resolution or frame rate when the system cannot keep up. If 60 fps is not working, try 30 fps. Simplify scenes by removing unnecessary sources or effects. OBS notes that changing the base canvas can require repositioning sources, so keep it intact unless resources are severely constrained.
- Encoding or rendering overload: lower output resolution or frame rate, simplify the scene, and check GPU load.
- Unstable stream or dropped frames: make sure the upload connection can sustain the selected bitrate; lower the bitrate or output settings if it cannot.
- AV1 option missing: check the installed OBS version, available encoder choices, GPU/driver support and whether the specific workflow accepts AV1. Use H.264 only if compatibility requires it.
- Converted file has playback or audio problems: retain the original, verify the export settings and audio handling, and test the output before going live.
Run a test with the same kind of movement and audio as the planned stream. Monitor OBS and YouTube stream-health indicators rather than assuming a setting is stable because a static test picture played successfully.
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Keep the stream running without leaving a PC on
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