You do not automatically need to convert an AV1 video to H.264 for an OBS stream to YouTube: YouTube lists AV1 among its supported live video codecs. Convert only if a part of your workflow cannot handle AV1 or you have a specific reason to stream using H.264.
On a low-end PC, converting a file before streaming and encoding a live stream are different workloads. An offline conversion can take time and use substantial CPU, while OBS must render and encode continuously in real time; H.264 conversion alone cannot guarantee that the PC will keep up.
Do you actually need to convert AV1?
Start by checking what you mean by “AV1 video file”. It may be a finished recording you want OBS to play as a source, or it may describe the codec you intend OBS to use for the outgoing live stream. Those are separate stages. A file’s codec does not, by itself, dictate the codec used for the live broadcast: OBS can decode a source and encode the outgoing stream in a different format, provided the computer and chosen workflow support the required steps.
YouTube’s live encoder settings guidance lists H.264, HEVC/H.265 and AV1 for RTMP/RTMPS video. That means an H.264 conversion is not a requirement simply because the destination is YouTube Live. OBS also documents AV1 and H.264 in its audio and video formats guide. Whether AV1 is a practical choice depends on your OBS version, available encoder and the role the file plays.
A useful first test is to add the AV1 file to OBS and play it locally, without going live. Watch the preview and listen to the audio from beginning to end, including a section with movement or a change in sound. If OBS cannot open it, playback stutters, or your planned editor rejects it, identify which component is the problem before converting. A different player or editor may be enough; if the rest of the workflow also needs H.264, conversion is more defensible.
For a devotional channel, for example, you might have a long AV1 video with aarti visuals and music. If OBS decodes it reliably and your outgoing stream is encoded using a supported setting, leaving the source as AV1 avoids an extra generation of lossy compression. If a required editing step cannot import it, an H.264 copy may make the whole workflow easier, but keep the original in case the conversion introduces artefacts or audio problems.
Check OBS and workflow compatibility
Compatibility is a chain, not a single YouTube setting. Check whether the installed OBS build can decode the file, whether your system can play it at the intended resolution and frame rate, whether the selected OBS output encoder is available, and whether the connection can sustain the live bitrate. If another editor, scheduler or playback tool is involved, check its own accepted formats as well. Avoid assuming that a device can encode AV1 merely because it can decode AV1, or that a particular GPU feature exists on every model in a product family.
OBS’s format guide covers AV1 and H.264, but the options shown in OBS depend on the installed software and hardware. Open Settings, then Output, and inspect the encoder choices for streaming. Make a note of the actual options rather than following a guide written for a different GPU or OBS version. If you use a file source, test it in the scene you will use, since decoding the source and compositing overlays can add work beyond the encoder itself.
If your workflow is an all-night playlist rather than a single clip, test the transitions too. A short file can play properly while a longer queue reveals a missing audio track, an unexpected blank interval or a source that stops at the end. This is a good point to review a 24/7 YouTube stream setup in Streamlabs Desktop if that is the software in your workflow; the broader lesson is to verify the specific playback path you plan to leave running.
Check the upload connection separately from file playback. YouTube recommends constant bitrate (CBR) and a keyframe interval of two seconds, with intervals not exceeding four seconds, in its live encoder guidance. The same guidance gives H.264 bitrate recommendations by output resolution and frame rate. Treat these as platform recommendations, not proof that your PC can encode or your broadband can upload steadily. A stable local preview says nothing about whether your internet connection will sustain the stream.
When H.264 is useful
H.264 remains a sensible compatibility choice when a required player, editor or intermediate tool does not accept AV1, or when you have decided to use an H.264 encoder for the outgoing stream. OBS describes H.264 as its default codec and notes its broad compatibility across devices and software. That can simplify hand-offs: a volunteer can review the file on a familiar device, or an editing tool can ingest it without an AV1-specific workflow.
H.264 may also be the codec you can encode with available hardware. OBS lists hardware encoding paths such as NVIDIA NVENC, AMD AMF and Intel Quick Sync Video for compatible systems. Availability depends on your exact hardware, drivers and software, so verify the encoder menu. Choosing an H.264 hardware encoder can shift encoding work away from the CPU, but it does not remove the work of decoding the source, rendering scenes, mixing audio or sending the stream.
| Situation | A reasonable starting choice | What to verify |
|---|---|---|
| OBS accepts the AV1 source and playback is steady | Keep the source as AV1 | Check the outgoing encoder and run a representative test |
| An editor or player in the workflow rejects AV1 | Make an H.264 copy if that resolves the incompatibility | Confirm the output opens and audio remains in sync |
| Your system offers a compatible H.264 hardware encoder | Consider it for OBS output | Check actual encoder availability and stream performance |
| OBS is already overloaded while rendering scenes | Do not assume conversion will solve it | Test lower output resolution or frame rate and simpler scenes |
| You only want to change the file container | Remux only if that container is the issue | Remuxing does not change AV1 video into H.264 |
These are workflow choices, not a ranking in which one codec is always better. YouTube’s accepted codec list answers whether the platform supports a codec; it does not select an appropriate encoder for your PC or diagnose a particular dropped-frame problem.
Offline conversion versus real-time streaming
An offline conversion reads a saved file, decodes its video, then encodes a new file. It does not have to finish each frame within the time that frame represents: you can let it run while you are not streaming. On a modest computer it may take a long time or make the PC difficult to use during the job. The conversion can still be useful if done once and reused, but it is another encoding pass and may reduce picture quality.
OBS streaming has a different constraint. Each frame must be decoded, composed with any scenes or overlays, and encoded quickly enough to be sent in sequence. If the system falls behind, the stream can miss frames even when the file plays correctly in a desktop player. OBS’s system requirements explain that CPU demands vary with encoder, resolution, frame rate and scene complexity. “Low-end PC” is not specific enough to predict the result: a machine with a capable hardware encoder may behave differently from one relying on software encoding.
There is a particularly important distinction if you plan to encode AV1 in software in real time. OBS’s formats guide says software AV1 encoding requires high-end CPUs for real-time compression. That is not the same as decoding and playing an already-compressed AV1 file, nor does it mean AV1 can never be streamed. It means you should check the actual outgoing encoder and avoid treating a successful file conversion as evidence that real-time encoding will be comfortable.
If a long conversion makes the computer hot or unresponsive, schedule it for a time when the stream is not running, and avoid running a demanding conversion while OBS is already encoding. You can test the conversion on a short representative section first, but do not use a tiny static image as your only test if the full programme contains movement, animation or changing overlays. The representative section should include the busiest visuals and the audio conditions you expect during the broadcast.
For a channel that needs to run continuously, a separate operating decision is whether the same PC must remain on and handle the broadcast. StreamNeo is relevant when keeping the home computer running and watching for a dropped broadcast is the specific operational burden: it turns an uploaded file into a YouTube live stream, so the local PC can be switched off. That does not decide whether your source should be AV1 or H.264; codec compatibility still belongs in your file and channel checks.
Choose an encoder suited to the PC
First look at the encoders OBS actually offers. If a compatible hardware encoder is available, OBS generally recommends hardware encoding for performance because a specialised GPU component can take encoding work off the CPU. Hardware encoding is system-specific, so confirm the option in OBS instead of relying on a brand name or an assumption about a GPU generation. If you do not have a suitable hardware path, software H.264 may be an option, but it still consumes CPU and must be tested at the output settings you intend to use.
The output resolution and frame rate are practical controls. OBS’s encoding performance troubleshooting guide recommends reducing output resolution to reduce GPU resources, lowering frame rate to reduce rendering and encoding work, and simplifying scenes. It suggests trying 30 fps if 60 fps is not working. You need not make the file itself smaller as a first response; test an output adjustment in OBS before doing a full conversion that may not address the bottleneck.
Keep the base canvas intact unless resources are severely constrained. OBS notes that changing it requires repositioning sources. Instead, consider a lower output resolution, fewer animated elements, or a simpler scene layout. For a still-image bhajan stream, an animated visualiser, multiple browser sources and several transition effects may place a different rendering load on the PC than a single static image. Change one thing at a time so you can tell what helped.
YouTube’s current recommendations also make resolution and frame rate relevant to upload capacity. Its H.264 guidance lists 8 Mbps for 720p at 30 fps and 60 fps, 14 Mbps for 1080p at 30 fps, and 17 Mbps for 1080p at 60 fps. These figures are YouTube recommendations, not a minimum speed guarantee and not an instruction to select the highest output. Choose an output that the PC can encode and the connection can sustain consistently; an unnecessarily ambitious setting can make a stream less reliable without improving the programme in a meaningful way.
Test output and stream performance
If conversion is needed, preserve the source and create a new H.264 output rather than overwriting the AV1 file. Select an encoder available on the machine, set an output resolution and frame rate deliberately, and make an intentional choice about audio. The research for this workflow does not establish a tested conversion command or one best transcoder setting for every low-end PC, so avoid copying an unexplained command. Software, hardware and source files vary, and a setting that works on one machine is not evidence for yours.
Play the converted file from start to finish, or at least inspect the beginning, middle and end plus any difficult section. Check that the picture opens in the target player, that audio is present and in sync, and that there are no unexpected black frames or cut-offs. Compare the output with the original before deleting anything. Re-encoding is lossy; a smaller or more widely compatible file is not automatically a better-looking one.
Then test OBS with the actual scene, audio sources and stream settings. YouTube recommends testing with representative audio and movement, monitoring stream health and reviewing any messages during the event. If possible, do this as an unlisted or otherwise controlled test before a public schedule depends on it, and check YouTube’s current settings and guidance rather than treating any one test as future approval. A test should include the parts most likely to expose trouble: a transition, a busy visual, and continuous audio.
If OBS indicates a performance problem, identify whether the issue is encoding, rendering or network output before changing codecs. A change to H.264 cannot fix weak upload bandwidth, a GPU overloaded by scenes, or a source that fails to decode smoothly. Reduce output resolution or frame rate, simplify the scene, and test again. Keep a note of the settings and the result so that a change you make later can be compared against a known baseline.
Audio deserves its own check if your channel plays a mixed playlist. Different source files may have noticeably different loudness even when the video conversion is successful. A practical companion is this guide to normalising audio levels across videos in a YouTube stream, which addresses a separate issue from video codec choice. Listen to the stream output rather than assuming the source file’s audio will sound balanced after it is placed in a long-running sequence.
Avoid unnecessary re-encoding
Do not convert simply because a tutorial uses H.264 or because an old workflow did. Each re-encode adds processing time and another lossy generation. If OBS plays AV1 reliably and your chosen output path works, keeping the original source can be the simpler and better-preserved workflow. Store the source safely until you have checked the converted copy and completed a real stream test.
Also distinguish remuxing from transcoding. Remuxing moves existing audio and video streams into a different container; it does not decode AV1 and encode H.264. If the problem is that a player expects a different container, remuxing may be sufficient, but if the player specifically lacks AV1 decoding, changing the container will not supply an H.264 video track. Diagnose the rejected component and test a short copy before processing the complete file.
For long-running streams, troubleshoot the complete chain rather than focusing only on codec names. The guide to checking whether FFmpeg is still streaming to YouTube is relevant if FFmpeg is part of your setup, while OBS users should watch the stream health and OBS statistics during a test. A reliable workflow depends on playback, scene rendering, encoding, upload and monitoring together; success at one stage does not prove the others are sound.
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FAQ
Does YouTube Live accept AV1?
Yes. YouTube’s current RTMP/RTMPS encoder guidance lists AV1 alongside H.264 and HEVC/H.265. Check the current official guidance and the encoder options in your OBS installation, because support by the platform does not ensure that a particular PC can encode AV1 in real time.
Will converting AV1 to H.264 make OBS run smoothly on a low-end PC?
Not necessarily. Conversion can solve a compatibility problem, but OBS still has to decode the source, render the scene, encode the output and upload it. Test the actual system, and if performance is poor, try a lower output resolution or frame rate and simplify scenes.
Is offline AV1-to-H.264 conversion the same as streaming in H.264?
No. Offline conversion creates a new file by decoding and re-encoding video; OBS’s live encoder separately creates the outgoing stream. You can use an H.264 source file with a different outgoing encoder if the workflow supports it, or stream from an AV1 source using H.264 output, but each stage has its own compatibility and performance demands.
Should I delete the AV1 original after making an H.264 copy?
Keep it until you have checked the new file’s picture, audio and playback in the intended workflow. Re-encoding can reduce quality or introduce a problem, and the original gives you a way back if the conversion settings or output do not work as expected.