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For a prerecorded video broadcast on YouTube Live, encode the outgoing feed to YouTube’s live ingestion settings—not its separate video-upload settings. You need a player or encoder that sends the recording as a live feed. YouTube’s general encoder guidance does not specify a special encoding profile just because the source is prerecorded.
Which encoding requirements apply?
YouTube receives a live stream from an encoder even when that encoder is playing a prerecorded file. Set the outgoing stream’s codec, resolution, frame rate, bitrate, and keyframes according to YouTube’s live encoder guidance. YouTube’s upload encoding settings apply to videos uploaded directly to YouTube; they are not a substitute for the live ingestion table. For example, YouTube’s H.264 live recommendation for 1080p30 is 14 Mbps, while its upload recommendation for standard-frame-rate 1080p is 8 Mbps.
The recommendations below reflect YouTube’s English live-encoder guidance reviewed on October 3, 2026; the help pages do not state a publication or revision date, and YouTube may change them.
Recommended YouTube Live settings
Codec, protocol, and audio
- Video codecs: YouTube lists H.264, H.265 (HEVC), and AV1 for RTMP/RTMPS ingestion. The bitrate table below is for H.264; do not assume its figures apply unchanged to another codec.
- Protocol: YouTube recommends RTMPS for a standard live encoder workflow.
- Audio: YouTube lists AAC or MP3 for RTMP/RTMPS. 5.1 surround audio is supported only with AAC.
- Frame rate: Up to 60 fps. Match the live output to the resolution and frame rate you intend to broadcast.
H.264 live bitrate by resolution and frame rate
These are YouTube’s recommended and minimum H.264 live-ingestion bitrates. Choose the row matching your outgoing resolution and frame rate.
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| Output | Recommended bitrate | Minimum bitrate |
|---|---|---|
| 720p30 | 8 Mbps | 3 Mbps |
| 720p60 | 8 Mbps | 3 Mbps |
| 1080p30 | 14 Mbps | 5 Mbps |
| 1080p60 | 17 Mbps | 6 Mbps |
| 1440p30 | 21 Mbps | 7 Mbps |
| 1440p60 | 34 Mbps | 8 Mbps |
| 2160p30 | 42 Mbps | 11 Mbps |
| 2160p60 | 50 Mbps | 14 Mbps |
Use constant bitrate (CBR). The minimum is not the target for a reliable broadcast: use the recommended value when your connection can sustain it. YouTube recommends about 20% upload-bandwidth headroom, so a 14 Mbps video feed calls for roughly 16.8 Mbps of available outbound capacity before accounting for other network use. Check actual sustained upload capacity rather than relying only on a speed-test peak.
Keyframes and picture format
- Set keyframes two seconds apart where possible; YouTube says the interval must not exceed four seconds.
- Use square pixels and progressive scan.
- For the settings listed in YouTube’s encoder guidance, use two B-frames, one reference frame, and CABAC.
- For SDR, YouTube specifies Rec. 709 and 8-bit video. Its guidance specifies 10-bit for HDR.
For HDR over RTMP(S), YouTube recommends H.265. AV1 is not supported for HDR in the guidance. YouTube also documents HLS ingestion for HDR or codecs not supported over RTMP; that is a distinct workflow, not a setting to mix into a standard RTMP stream.
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How to stream a prerecorded video as a live broadcast
- Check channel eligibility and enable live streaming. Your channel must be verified and must not have had a live-streaming restriction in the past 90 days; YouTube’s general guidance says streamers must be at least 16. First-time activation can take up to 24 hours. Check your current status in YouTube Studio because restrictions and eligibility can change. See YouTube’s live-streaming start guidance.
- Create or schedule the broadcast. In YouTube Studio, open the Live Control Room and create or schedule a stream. A scheduled event can be promoted and viewers can set reminders, but scheduling does not send the video: the encoder still needs to connect and feed it at show time. YouTube’s encoder setup guidance explains the connection workflow.
- Choose an encoder that can play the file. The encoder must take the prerecorded video as its source and send it to YouTube as a live feed. YouTube supports software and standalone hardware encoders; hardware is optional, not a prerequisite.
- Copy the server URL and stream key. Get them from the event’s encoder or stream settings in the Live Control Room, then enter them in the encoder. Treat the stream key like a password: anyone who obtains it may be able to send a feed to your broadcast. Do not publish or share it.
- Set the encoder output. Choose the output resolution and frame rate, select a supported codec, and use the matching live bitrate recommendation above. Configure CBR and a two-second keyframe interval (never over four seconds). Confirm that your sustained upload capacity has headroom.
- Preview and test before going public. Start the encoder and check the incoming preview, picture, audio, and stream-health messages in Live Control Room before clicking Go live. YouTube advises setting up in advance and starting the encoder at least 15 minutes before the scheduled start. Its instruction is simple: “Make sure to test before you start your live stream.” See YouTube’s encoder settings and testing guidance.
- Monitor the broadcast. Watch the Live Control Room’s stream health and messages while live. A scheduled page or a successful preview does not remove the need to monitor the actual outgoing feed.
Copyright, reused content, and archives
Encoding settings only describe the technical feed; they do not grant rights to the video, music, or other material in it. Use content you own or have permission to stream, and consider YouTube’s copyright and monetization rules before broadcasting. Repeating or compiling prerecorded material does not by itself establish that a channel qualifies for monetization: YouTube assesses channels under its applicable monetization policies. For a practical preflight, use StreamNeo’s copyright safety checklist.
YouTube says streams under 12 hours are automatically archived. An archive is not a dependable sole backup of your source recording, so keep the original file separately if you need a copy.
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When HLS is the right path
HLS is a separate YouTube ingestion protocol, not another name for RTMP. It is documented for HDR or codecs that RTMP does not support and requires a compatible encoder. Its transport rules include TS segments of 1–4 seconds, a rolling playlist with no more than five outstanding segments, HTTPS POST/PUT, and no byte range. Because HLS sends segments rather than a continuous RTMP feed, it has higher latency. Use those requirements only for an HLS workflow; they do not apply to a standard RTMP/RTMPS setup. See YouTube’s HLS ingestion guidance.
Troubleshooting common encoding problems
| Symptom | Likely cause | What to check |
|---|---|---|
| Stream health reports unstable or the picture buffers | Outbound bandwidth is insufficient or fluctuating, or the bitrate is too high for the connection. | Check sustained upload capacity and network use; leave about 20% headroom. If necessary, lower output resolution or frame rate, then use the bitrate recommendation for the new combination. |
| Video looks blocky or loses detail | Bitrate may be below YouTube’s recommendation for the selected codec, resolution, and frame rate. | Confirm the encoder is using CBR and the correct H.264 table row. Check whether the connection can sustain the recommended bitrate. |
| Encoder will not connect | The stream key or server URL may be wrong, or live streaming may not be enabled for the channel. | Copy the current connection details from the correct Live Control Room event, check channel eligibility, and confirm the encoder is using the intended ingestion protocol. |
| Preview is blank or the event is late to start | The encoder may not be sending, may be playing the wrong source, or may not have been started early enough to test. | Confirm the prerecorded file is selected as the encoder source, start the feed in advance, and verify the preview before clicking Go live. |
| Audio is missing or surround audio is rejected | The audio codec may be unsupported for the workflow, or 5.1 audio may be configured with a codec other than AAC. | For RTMP/RTMPS use AAC or MP3; use AAC for 5.1 surround. |
| HDR settings do not work over the chosen path | The codec and ingestion protocol combination may not support the intended HDR workflow. | For HDR over RTMP(S), YouTube recommends H.265 and does not support AV1 for HDR. If the case requires HLS, use its separate compatible encoder and segment rules. |
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