For an OBS-fed 4K 60fps YouTube Live stream, AV1 and HEVC are both listed as ingest options, and YouTube recommends the same bitrate for each. If your programme is HDR, choose HEVC: YouTube’s published guidance names it for HDR and says AV1 is not supported for HDR.
For SDR, the bitrate table does not give AV1 an ingest advantage over HEVC. Use whichever encoder is available and reliable on your actual computer, then test the complete path from prerecorded file playback through OBS to YouTube before scheduling a long broadcast.
What YouTube accepts for 4K60 ingest
The codec comparison here concerns the live encoder feed that OBS sends to YouTube, not the format of the file sitting on your disk. A prerecorded MP4 might use one codec internally, while OBS decodes that file and encodes a separate outgoing stream. The outgoing stream’s settings determine what YouTube receives.
YouTube’s live encoder settings list AV1 and H.265 (HEVC) among the video codec choices for RTMP/RTMPS ingest. The guidance permits up to 60 frames per second. It also recommends constant bitrate (CBR) and a two-second keyframe interval, with the interval not exceeding four seconds. These are ingest settings, not a promise that a particular encoder preset or source file will look good.
At 4K / 2160p and 60fps, the YouTube table gives AV1 and HEVC a recommended bitrate of 35 Mbps. It lists 10 Mbps as a minimum for those codecs. H.264’s corresponding recommendation is 50 Mbps, with a 14 Mbps minimum. Do not mistake a minimum for a sensible target: the recommended figures are the relevant starting point for planning a 4K60 feed.
The table is general encoder guidance. It does not introduce a special rule for prerecorded playback in OBS, and it does not rank AV1 against HEVC for a particular devotional recording, lofi visual, news loop or ambience scene. The distinction between the file and the live feed matters: a compressed source file can be decoded and sent through OBS at a separately selected live bitrate, but it cannot regain detail that was lost in the source.
YouTube says it transcodes a live stream into output formats for viewers using different devices and network conditions. Your job is to send a stable, correctly configured feed; YouTube’s delivery process does not remove the need to check the encoder preview and the result viewers actually see. For a longer, unattended broadcast, the practical question is not just whether a codec appears in a table, but whether the whole setup keeps producing usable video and audio.
How the bitrate guidance compares
The published recommendation places AV1 and HEVC on equal footing for 4K60 ingest bandwidth. If both are correctly configured at the recommended rate, you should not choose between them on the assumption that YouTube asks for less bandwidth from AV1. The same table recommends more bitrate for H.264, but that does not mean you should switch to AV1 or HEVC without checking hardware support and the rest of the workflow.
| YouTube ingest setting | AV1 | HEVC (H.265) | H.264 |
|---|---|---|---|
| 4K / 2160p at 60fps, recommended bitrate | 35 Mbps | 35 Mbps | 50 Mbps |
| 4K / 2160p at 60fps, minimum in the table | 10 Mbps | 10 Mbps | 14 Mbps |
| HDR in cited YouTube guidance | Not supported | Supported choice | Not the named HDR choice in this guidance |
The bitrate figures come from YouTube’s encoder table; that page does not show a publication year. Treat the recommended rate as a configuration target, not a guarantee of picture quality or connection stability. A stream can still suffer if the uplink varies, the encoder cannot keep pace, OBS drops frames, or the source itself has uneven frame pacing.
A 35 Mbps video feed also needs headroom beyond the number shown in the table. Audio, network protocol overhead and ordinary variation on your connection all add practical load. Do not provision an uplink that only just reaches the video target under ideal conditions. Test over the same network and at a comparable time of day to the planned broadcast, and watch for buffering, dropped frames and bitrate instability.
YouTube’s guide says 4K streams are optimised for quality at normal latency; its low-latency improvement is unavailable at 4K. That means a 4K60 event should not be planned around an assumption of the smallest possible live delay. If immediate audience interaction matters more than 4K detail, reassess the resolution and latency requirements rather than trying to solve the trade-off by changing codec alone.
Choose HEVC for HDR
HDR is the point that settles the choice. In the cited YouTube guidance, H.265/HEVC is the supported video codec for HDR and AV1 is explicitly listed as not supported for HDR. If the prerecorded programme is meant to remain HDR in the live feed, choose HEVC rather than treating AV1’s general efficiency claims as a reason to use it.
This decision applies to the programme and the intended output, not simply to whether the source file has HDR metadata. Check that the file, playback path, OBS video configuration and outgoing encoder settings are all consistent with HDR. A mismatch can produce a feed that is washed out, clipped or otherwise different from the intended image. A short preview on a suitable HDR display is more useful than assuming that a file label proves the whole chain is configured correctly.
OBS added HDR over RTMP for HEVC in its 30.1 release notes. That is useful context, but release notes describe capability in a specific version; they do not prove that every operating system, encoder or YouTube setup is configured correctly today. Review the current OBS release notes and confirm the controls exposed by your installed build.
YouTube’s recommendation does not make HEVC a guarantee of HDR approval or correct appearance. Check the current official instructions before a public event, and inspect the Live Control Room preview and playback on a suitable device. If the HDR intent is not essential, an SDR version can simplify the decision, but convert and review it deliberately rather than merely changing a label in OBS.
Choose an available, reliable codec for SDR
For SDR, YouTube’s 4K60 bitrate recommendation is the same for AV1 and HEVC. That leaves the practical choice to encoder availability, stability, image quality on your content, and what else you need to do with the source file. OBS’s audio and video formats guide describes AV1 as generally offering improved quality or file size over HEVC, but that broad comparison is not a controlled result for your file, your encoder hardware or YouTube’s live transcode.
Do not translate general compression efficiency into a promise that an AV1 live stream will look better than HEVC at the same settings. Encoder implementations and presets vary, as do the kinds of images in your programme. A static devotional image with lyrics, a moving nature scene, a news ticker and a music visualiser stress encoding in different ways. Look at your actual material in a test; avoid spending on new hardware based only on a general codec statement.
HEVC may also suit you if you need the encoded material to pass through an existing editing or archive workflow. OBS notes broader support for HEVC among editing software than for AV1. That is a workflow consideration rather than a YouTube ingest advantage. If you only need OBS to encode a live feed and you do not handle its output elsewhere, the editing compatibility difference may not matter.
For either codec, a stable encoder at the recommended target is preferable to a theoretically more efficient codec that your machine cannot sustain. If OBS reports encoder overload or dropped frames, lower the workload or change to an encoder your system can handle before reducing bitrate blindly. A lower bitrate might reduce network demand but can also reduce detail; it will not cure a playback stutter or an overloaded GPU.
Check OBS and hardware support
AV1 and HEVC streaming support in OBS arrived through Enhanced RTMP support. OBS version 29.1 release notes described the feature as a YouTube beta at the time, while later OBS material discusses its work with YouTube on AV1 and HEVC support. Those historic notes establish that the capability was added, not that every combination of OBS version, operating system, GPU and YouTube account exposes the same choices now.
Open the installed OBS output settings and check the actual streaming encoder list. Do this on the computer and operating system you intend to run. A codec may be supported by YouTube but absent from your available OBS encoders, or present only as a software option that cannot encode 4K60 comfortably on your processor. Do not infer availability from a different computer’s screenshot or a GPU model alone.
OBS’s formats guide describes hardware AV1 encoding on recent AMD RX 7000, NVIDIA RTX 40-series and Intel Arc GPUs, and notes that software AV1 encoding is possible but demanding for real-time compression. Treat those as guidance to narrow what to check, not as a complete compatibility matrix. Driver, operating system, encoder mode and OBS build can affect what you can select.
If the encoder you want is missing, first update only through a normal, planned maintenance process and verify current OBS documentation for your platform. Check whether another suitable hardware encoder is already available before considering a GPU purchase. For an SDR stream, HEVC can be a perfectly reasonable choice where it appears reliably; a purchase is not a prerequisite simply because AV1 exists.
You can also use the local OBS recording output as a separate decision. A format that works well for a live feed may not be the most convenient archive format for editing or transfer. Keep the live encoder choice and the file/archive workflow distinct: changing the outgoing stream codec does not require you to re-encode the original prerecorded programme unless the source itself is unsuitable.
Test the complete prerecorded-to-live chain
YouTube recommends testing the encoder setup before an event and checking the feed in Live Control Room. For a prerecorded programme, expand that test to include the file playback and the way OBS handles it. A codec setting by itself cannot tell you whether the video reaches the live ingest on time, loops cleanly, or keeps audio in sync.
Start with a representative section of the actual source, including the most demanding motion or graphics. Confirm that the file’s frame rate is understood by the playback method and that OBS’s output is set for 60fps if that is the intended feed. Watch the audio over scene changes and any points where playback may pause or repeat. A seamless-looking file can still reveal a gap or click at a loop boundary once it is played continuously.
Then check OBS’s outgoing settings against YouTube’s recommendations: CBR, the appropriate bitrate for the selected codec and resolution, and the keyframe interval. Confirm that the encoder is not reporting overload and that frames are not being dropped. Test the uplink during the run; a speed test taken earlier is not evidence that a continuous 4K60 feed will remain steady.
Create a private or unlisted test where appropriate and inspect the Live Control Room preview, then view the result on the devices your audience is likely to use. Check fine text, gradients, dark scenes, motion, colour and audio synchronisation. If HDR is involved, include a suitable HDR playback device. For SDR, compare AV1 and HEVC only if both are available on the intended machine and you can test comparable content and settings; OBS does not document a dedicated codec-comparison workflow for prerecorded YouTube Live.
YouTube advises starting encoder setup ahead of the event, including at least 15 minutes before the planned start, to allow time to check the feed. For a recurring 24/7 channel, this is a reason to rehearse restarts, not a substitute for monitoring. A short successful test cannot prove that a week-long stream will remain stable, but it can catch wrong keys, missing audio, an unsuitable frame rate, or a source that stops after one play-through.
For channel operations beyond encoder setup, keep playback continuity and recovery in view. The practical checks in a guide to checking whether a prerecorded stream is live without keeping a PC on can help you think through what needs monitoring after the initial test. If you are building a schedule from several files, the approach to switching between scheduled radio programmes is a separate programming question from which codec OBS sends.
A local OBS setup can be useful when you want direct control of a scene, live overlays or last-minute changes, but it means the playback computer and connection are part of the broadcast path. If the specific pain is having to leave that computer running for a fixed prerecorded programme, StreamNeo removes that computer-on requirement by turning an uploaded file into a YouTube Live broadcast; it does not replace OBS when you need its live production controls.
For a continuous devotional stream, file rights and programme continuity also need their own checks. Codec selection does not resolve whether you can rebroadcast the music or whether a playlist loops as intended. A walkthrough for creating a 24/7 Sikh devotional music stream covers those channel considerations, while the codec decision remains tied to the feed you actually send.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
Is AV1 better than HEVC for 4K60 YouTube Live?
Not automatically. YouTube’s published table recommends 35 Mbps for either codec at 4K60, and OBS’s general efficiency guidance is not a measured comparison of your particular prerecorded video. For SDR, test both only if they are available and stable on the system you will use.
Can I use AV1 for an HDR YouTube Live stream?
YouTube’s cited guidance says AV1 is not supported for HDR and identifies HEVC as the supported choice. Check the current official HDR instructions before streaming, and verify the whole file-to-OBS-to-YouTube path rather than relying on the source file’s label.
Does the prerecorded file need to be AV1 or HEVC?
No. The codec being compared here is the outgoing live encoder feed. OBS can decode a source file and encode the feed using a different codec, provided the playback and encoding setup can handle the file smoothly.
Should I buy a new GPU to use AV1?
Not before checking the encoder options already available in OBS on your actual computer. If AV1 is unavailable or unstable, HEVC is a valid SDR choice under YouTube’s published 4K60 guidance, and it is the choice for HDR in the cited instructions.