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Yes. YouTube Live accepts H.265 (HEVC) over HLS, including playlist-based streams, and also lists HEVC for RTMP/RTMPS ingestion. For HLS, however, the encoder must meet YouTube’s specific playlist and segment requirements; a compatible codec alone is not enough.
HEVC over HLS or RTMP/RTMPS?
YouTube’s HLS setup guidance explicitly supports HEVC alongside H.264. Its general live encoder settings also list H.265 (HEVC) for RTMP/RTMPS, so HEVC is not restricted to HLS. The practical difference is that HLS requires a compliant rolling playlist and segmented delivery; RTMP/RTMPS does not use that HLS playlist contract.
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| Decision | HLS | RTMP/RTMPS |
|---|---|---|
| HEVC ingestion | Explicitly supported in YouTube’s HLS setup guidance. | H.265 (HEVC) is listed in YouTube’s general encoder settings. |
| Playlist requirements | TS segments, a rolling playlist, no more than five outstanding segments, no byte-range addressing, and HTTPS POST/PUT. | No HLS playlist contract; follow YouTube’s RTMP/RTMPS encoder settings. |
| Latency | Higher than continuous RTMP delivery; YouTube’s ultra-low-latency option is unavailable for HLS. | Use the latency choices available for the selected stream. |
| HDR | Supported with HEVC and the required HDR signal settings; YouTube specifies HLS output rules. | YouTube recommends H.265 over RTMP(S) for HDR when the encoder supports the required capabilities. |
| First compatibility check | Confirm the encoder can generate YouTube-compliant HLS and HEVC. | Confirm HEVC output over RTMPS and apply YouTube’s current settings. |
This is a comparison of YouTube’s published protocol and codec guidance, not a guarantee that a particular encoder, model, or software version will work.
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Set up an HLS playlist stream with HEVC
- Select the protocol. In YouTube Live Control Room, create or select a stream key configured for HLS. Use the HLS server URL shown in Live Control Room; it begins with
https. If you configure backup ingestion, use the backup URL provided there. Treat the stream key as a credential and do not publish it. - Configure the encoder’s HLS output. YouTube requires Transport Stream (TS) segments lasting 1–4 seconds and a rolling playlist with no more than five outstanding segments. Do not use byte-range addressing. Send segments using HTTPS POST or PUT; encryption beyond HTTPS is unsupported.
- Set the video and audio codecs. Choose HEVC for video. YouTube’s HLS codec guidance supports AAC, AC3, or EAC3 audio. Confirm that your encoder actually produces these formats for HLS, rather than assuming a codec option for a different protocol also applies.
- Test before relying on the stream. Inspect the generated playlist and segments against the requirements above. Then send representative sound and movement, check the Live Control Room preview, and monitor stream health. YouTube recommends leaving upload-bandwidth headroom; its streaming tips specify 20% as recommended.
Choose bitrate and keyframe settings
For RTMP/RTMPS, YouTube recommends RTMPS, constant bitrate encoding, frame rates up to 60 fps, and a two-second keyframe interval (no more than four seconds). Use YouTube’s current bitrate table for the chosen codec, resolution, and frame rate rather than carrying a figure over from another profile. For reference, the table lists these HEVC examples; they are published recommendations, not performance guarantees:
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| HEVC profile | YouTube recommended bitrate | YouTube minimum bitrate |
|---|---|---|
| 1080p at 30 fps | 10 Mbps | 4 Mbps |
| 1080p at 60 fps | 12 Mbps | 4 Mbps |
| 2160p (4K) at 60 fps | 35 Mbps | 10 Mbps |
YouTube’s general encoder page does not state a publication year. These figures are examples from its current table, not measured results. Check that page again for your exact profile and leave bandwidth headroom.
What changes for HDR?
YouTube’s HDR guidance says that HDR streaming is currently supported only with H.265 (HEVC). The source and encoder must agree on the HDR signal: 10-bit video, BT.2020 color primaries and matrix, and either ST 2084 PQ or HLG transfer characteristics. Use the settings appropriate to the source rather than applying HDR signaling to ordinary SDR video.
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YouTube documents HDR over RTMP(S) or HLS. For HDR stream keys, it instructs users to choose HLS and leave “Turn on manual resolution” unchecked. Hardware and software encoder paths can differ, so follow the instructions for your exact encoder. YouTube names Cobalt encoders that support HEVC HDR and Telestream Lightspeed Live Stream as examples; this is not a compatibility guarantee for every model in either product range. Check the specific model’s manual.
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Validate compatibility before a live event
- Verify that the stream key is set to the protocol you intend to use: HLS or RTMP/RTMPS.
- Check the exact encoder model and software version for HEVC output over that protocol.
- For HLS, verify TS segments of 1–4 seconds, rolling playlist behavior, five or fewer outstanding segments, and no byte ranges.
- For HDR, confirm the source and encoder match on 10-bit, BT.2020, and PQ or HLG signaling.
- Run a test with representative audio and motion; check the Live Control Room preview and stream-health indicators.
Troubleshoot common HEVC playlist problems
- YouTube does not receive the stream: Confirm the stream key uses HLS if you are sending HLS, and use the server URL shown in Live Control Room. Check the encoder’s protocol-specific HEVC support.
- The playlist is rejected or playback is unstable: Check that segments are TS, last 1–4 seconds, the playlist rolls, no more than five segments are outstanding, and byte-range addressing is disabled. Use HTTPS POST/PUT.
- Audio is missing or unsupported: Check that the HLS audio output is AAC, AC3, or EAC3, and verify the encoder is applying that setting to the active stream.
- Latency is higher than expected: HLS is segmented, and YouTube says ultra-low latency is unavailable for HLS. If lower latency is important, evaluate an RTMP/RTMPS workflow and the latency options available for that stream.
- HDR looks wrong or is not accepted: Check the 10-bit depth, BT.2020 primaries and matrix, and PQ or HLG transfer setting against the actual source. For HDR stream keys, make sure HLS is selected and “Turn on manual resolution” is unchecked.
- The stream drops or has health warnings: Check available upload bandwidth and leave headroom, then test with the intended resolution, frame rate, motion, and audio before the event.
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