An AWS Elemental MediaLive HLS input pulls a live HLS playlist from an upstream HTTP or HTTPS source; it is not where you enter YouTube’s ingest URL. Configure the MediaLive input with the upstream playlist, then configure the channel’s output separately for the ingest protocol and destination URL provided by YouTube Live Control Room. YouTube recommends RTMPS for ordinary encoder streaming and also offers HLS ingestion.
Understand the input and destination before configuring anything
The direction of the connection is the key distinction:
- MediaLive HLS input: MediaLive pulls a playlist and media segments from an upstream HTTP or HTTPS server.
- YouTube ingest: Your encoder or streaming output sends media to the server URL and stream key supplied by YouTube.
Do not paste YouTube’s destination URL into the MediaLive HLS input field. You need an actual upstream HLS playlist URL from the source operator. The input and the YouTube destination are separate parts of the workflow. AWS and YouTube document their respective setup steps, but those instructions do not by themselves establish that a particular MediaLive channel configuration supports a specific YouTube output. Confirm the output mode against current MediaLive support and the selected YouTube stream settings.
What you need before creating the input
- The upstream HLS playlist URL or URLs, provided by the source operator.
- Any username, password, or other credentials required by the upstream server or encrypted HLS license server.
- A decision about the MediaLive input class and channel topology: AWS specifies two source URLs for a standard input and one for a single-class input. For standard configurations, use genuinely available redundant upstream endpoints; repeating one URL does not create source redundancy. See AWS’s HLS input setup guidance.
- A YouTube Live Control Room stream and the destination protocol you intend to use. YouTube supplies the matching URL and stream key in the control room.
Check that the HLS playlist is changing as a live source. A static VOD playlist is not equivalent to a live stream, and the MediaLive buffer setting affects how AWS treats the input.
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Create the MediaLive HLS input
- In the AWS Elemental MediaLive console, open Inputs and choose Create input.
- Enter a name for the input and set Input type to HLS.
- Choose the input class that matches the planned channel topology. Provide two upstream source URLs for a standard input or one for a single-class input, as applicable. Ensure each URL is a real endpoint supplied by the source operator.
- If the upstream server or encrypted HLS license server requires credentials, configure them for the input. AWS stores these credentials using Systems Manager Parameter Store password parameters.
- Create the input. Then open the intended MediaLive channel, go to Input attachments, and attach the input you created. AWS describes this attachment step in its input attachment guidance.
Set the live HLS buffer correctly
For HTTP or HTTPS HLS sources, set Buffer segments to a value from 3 through 10 inclusive when the source is live. AWS states that a value of 11 or more, or leaving the setting empty, makes MediaLive treat the input as VOD. AWS also does not recommend Amazon S3 as a live source. See AWS’s HLS input settings guidance.
This setting is for the MediaLive pull input, not YouTube’s output. If the source operator provides guidance about playlist behavior or segment availability, use it when selecting a value within AWS’s documented live range.
Choose and configure the YouTube destination separately
In YouTube Live Control Room, create or select the stream and choose its ingest protocol. The stream key identifies the encoder feed to YouTube and allows YouTube to accept it; treat it as a secret. Use the URL and key shown for the selected protocol rather than reusing values from another stream or protocol. YouTube’s encoder setup guidance explains the stream URL and key.
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| Destination choice | Values from YouTube | What to account for |
|---|---|---|
| RTMPS | RTMPS server URL and stream key from Live Control Room | YouTube recommends RTMPS, an encrypted variant of RTMP, for ordinary encoder streaming. Configure it as a MediaLive channel output only if the required output mode is supported and its URL/key requirements match. |
| HLS ingestion | An HTTPS ingest URL and an HLS-protocol stream key | Select an HLS protocol stream key in Live Control Room. YouTube says the stream URL changes and starts with HTTPS; use the returned URL exactly, including query fields, and substitute the stream key only where YouTube’s instructions specify. |
The HLS input described earlier remains a pull from your upstream source even when the YouTube destination is configured for HLS. The word “HLS” in both places does not make them the same endpoint or configuration.
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Encoder settings and HLS-specific constraints
General YouTube encoder guidance
YouTube’s published encoder settings list RTMP/RTMPS protocols; H.264, H.265, or AV1 video; up to 60 fps; AAC or MP3 audio; and constant bitrate (CBR) encoding. YouTube recommends a 2-second keyframe interval and sets a maximum of 4 seconds. These are YouTube encoder requirements and recommendations, not evidence that a particular MediaLive output setup has been tested. Check the current YouTube encoder settings for the chosen stream mode.
Additional constraints for YouTube HDR over HLS
YouTube’s HDR/HLS guidance specifies 1–4 second segments, TS segment format, a rolling playlist with no more than five outstanding segments, no byte-range support, HTTPS POST/PUT, and encryption unsupported except HTTPS. These constraints apply to the described HDR HLS workflow; do not assume they apply identically to every YouTube HLS mode. Review YouTube’s HDR live streaming guidance for the selected workflow.
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Validate the setup before relying on it
- Confirm the MediaLive input points to the upstream playlist, not the YouTube ingest URL.
- Confirm the source URLs match the selected input class and that any redundant endpoints are independently available.
- Confirm credentials are correct and the input is attached to the intended channel.
- For live HTTP/HTTPS HLS, verify Buffer segments is set from 3 to 10, not blank or 11 and above.
- Confirm the YouTube stream protocol, destination URL, and stream key all correspond to the same stream in Live Control Room.
- Verify the MediaLive channel’s output mode and YouTube’s current requirements together. The official setup guidance cited here does not report an end-to-end MediaLive-to-YouTube test.
Troubleshooting common configuration mistakes
MediaLive cannot read the source
Check that the input URL is the upstream HLS playlist, that the URL is accessible over the configured HTTP or HTTPS path, and that any required server or license credentials are configured. Ask the source operator to confirm the playlist is available and changing.
A live playlist is treated as VOD
Inspect Buffer segments. For a live HTTP/HTTPS HLS source, AWS documents 3–10; an empty value or 11 and above causes MediaLive to treat the input as VOD.
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The input has no usable redundancy
For a standard input, AWS specifies two source URLs. Confirm they are separate, working upstream endpoints rather than the same URL entered twice. A single-class input uses one URL.
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YouTube does not accept the output
Check that the URL and stream key came from the same selected stream and protocol in Live Control Room. For HLS ingestion, choose an HLS-protocol key and use its HTTPS URL exactly; for ordinary encoder streaming, YouTube recommends RTMPS. Also confirm that the selected MediaLive output mode supports the destination requirements.
The stream key may have been exposed
Treat the key as a password. If it has been shared publicly or entered in an untrusted location, replace or reset it through YouTube’s stream settings, then update the output configuration with the current value.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Copyright and YouTube live-stream eligibility
Before sending a feed, make sure you have the rights to the video, music, and other material in it, and follow YouTube’s live-stream rules. A technically valid input and destination do not establish that the content is permitted to stream or eligible for monetization. Review YouTube’s current policies for the channel and content rather than assuming that an HLS configuration changes those obligations.
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