# Document history for user guide The following table describes the documentation for this release of AWS Elemental MediaLive + **API version: latest** | Change | Description | Date | | --- |--- |--- | | [Using Elemental Inference features using the CLI](elemental-inference-cli.md) | The guide now includes a section about setting up and monitoring Elemental Inference features that you have included in a channel. | April 7, 2026 | | [MediaConnect Router output group](opg-mediaconnect-router.md) | The guide now includes information about the new MediaConnect Router output group. | March 31, 2026 | | [Requirements for Elemental Inference](requirements-for-inference.md) | The guide has been updated to include information about IAM permissions that MediaLive needs when you implement AWS Elemental Inference features in a channel. | March 5, 2026 | | [Permissions for trusted entity for Elemental Inference](trusted-entity-requirements.md) | The information about permissions for the trusted entity has been updated to include the permissions that MediaLive needs if you use any of the Elemental Inference features. | March 2, 2026 | | [New features: Smart crop and event clipping](elemental-inference.md) | MediaLive includes two new features: smart crop and event clipping. | February 24, 2026 | | [Working with SRT Listener input](input-listener-srt.md) | The guide now includes information about working with SRT Listener inputs. | February 15, 2026 | | [SRT listener mode for outputs](opg-srt.md) | The guide now includes information about configuring SRT outputs in listener mode, where MediaLive acts as the server and downstream systems connect to MediaLive to pull content. | February 15, 2026 | | [Encoding schemes for AV1](supported-containers-and-codecs-output.md) | You can now explicitly configure the bit depth for AV1 output encodes. | February 9, 2026 | | [Codec details for AV1](create-video-scratch.md) | AV1 output encodes now support a configurable Bit Depth field. | February 9, 2026 | | [Video aligned locking](pipeline-lock.md) | The guide has been updated to document video aligned locking, which enables synchronization using visual signature comparison instead of embedded timecodes. | December 31, 2025 | | [Monitoring activity programatically](monitoring-api.md) | You can now monitoring alerts using an AWS SDK or API. | October 22, 2025 | | [SRT caller output group](opg-srt.md) | The guide now includes a section for SRT caller output groups. The section includes specific information about how to send SRT output to an AWS Elemental MediaConnect flow. | August 8, 2025 | | [Pipeline locking can now be disabled](pipeline-lock.md) | The guide has been updated to reflect that you can now disable pipeline locking. | June 24, 2025 | | [Change to support for 3D LUTs files](color-space-simplified-supported-conversions.md) | Previously, you could use a 3D LUTs file when converting to Dolby Vision 8.1 only if the source was HDR10. Now, you can use a 3D LUTs file when converting from any supported color space. | June 6, 2025 | | [Working with SRT Caller input](input-caller-srt.md) | The guide now includes information about working with SRT Caller inputs. | May 13, 2025 | | [MQCS metrics](eml-metrics-quality-score.md) | The metrics section now includes information about all metrics relating to MQCS (media quality confidence score). | April 28, 2025 | | [Limits for API requests](eml-limitations-and-rules.md#limits-api) | The limits for frequency of API requests have been updated to 20 steady-state TPS and 30 burst. | April 21, 2025 | | [UHD Link support HD and UHD resolution](device-edit.md) | You can now configure a UHD Link device as either an HD or UHD video source for a MediaLive input. Configuring the resolution lets AWS apply different charges for HD resolution and UHD resolution. | April 10, 2025 | | [Passing through ID3 metadata in CMAF Ingest](enable-passthrough-id3.md) | You can now configure a CMAF Ingest output group to pass through ID3 metadata. | April 10, 2025 | | [Inserting ID3 timed metadata in CMAF Ingest](insert-timed-metadata.md) | You can now configure a CMAF Ingest output group to include ID3 timed metadata. | April 10, 2025 | | [SMPTE 2110 inputs](input-create-s2110.md) | The guide now includes information about working with SMPTE 2110 inputs. | April 2, 2025 | | [Correction to the node registration policy for MediaLive Anywhere](emla-deploy-users-ecs-permissions.md#emla-deploy-users-ssm-script) | The guide now shows the correct content for the node registration policy. | February 14, 2025 | | [ID3 segment insertion with CMAF Ingest](insert-id3-metadata-via-schedule.md) | The existing feature to use the MediaLive schedule to insert ID3 metadata in every segment has been expanded. The CMAFI Ingest output group now supports this feature. | December 20, 2024 | | [ID3 metadata in audio-only HLS outputs](id3-metadata.md) | The section about ID3 metadata insertion has been completely revised. In addition, information has been added about the existing feature to include ID3 metadata in every segment of an audio-only HLS output. | November 23, 2024 | | [MQCS (media quality confidence score)](mqcs.md) | The guide has been updated to include information about this new feature. | November 22, 2024 | | [Instance role for MediaLive Anywhere](emla-deploy-instance-role.md) | The section about creating an Instance role has been updated to include two policies that were accidentally omitted. | September 23, 2024 | | [Support for MPEG-1 codec](supported-containers-and-codecs-output.md) | The guide has been updated to identify the types of output groups that support the MPEG-1 Layer II (MP2) codec. This codec has been supported for several years. | September 12, 2024 | | [Support for AV1 codec](supported-containers-and-codecs-output.md) | MediaLive now supports the AV1 codec in some types of output. The guide has been updated in various video-related sections to describe the support. | September 12, 2024 | | [Introduction of AWS Elemental MediaLive Anywhere](setup-emla.md) | The guide now includes information about MediaLive Anywhere, which lets you run channels on on-premises hardware located in your organization's data center. | September 11, 2024 | | [IAM access for AWS Elemental MediaLive Anywhere](requirements-for-emla.md) | The guide has been updated to describe the IAM access you need for AWS Elemental MediaLive Anywhere. | September 11, 2024 | | [AWS managed policy - New policy](security-iam-awsmanpol.md) | The MediaLiveReadOnlyPolicy has been created. | July 23, 2024 | | [Creating output groups](medialive-outputs.md) | The section about creating output groups has been completely revised. The revision consolidates the information about gathering data, information about designing the encodes, and the procedure for creating the output group using the MediaLive Console | July 9, 2024 | | [Accessibility data in captions](captions-accessibility.md) | The guide now includes information about how to include accessibility data in captions outputs. | June 25, 2024 | | [Accessibility data in audio](audio-accessibility.md) | The guide now includes information about how to include accessibility data in audio outputs. | June 25, 2024 | | [Per-output image overlay](image-overlay-features.md) | The guide now includes a section on the recently added feature to insert an image overlay in specific outputs in the channel. This feature supplements the existing feature that lets you insert an image overlay in every output in every output group in the channel. | June 20, 2024 | | [Segment breaks triggered by SCTE 35 messages.](getting-ready-set-the-ad-avail-mode.md) | You can now configure how MediaLive performs segmentation in some types of output group, when a SCTE 35 message is inserted into the output. | June 14, 2024 | | [CMAF Ingest output group](opg-cmafi.md) | The guide now includes information about the new CMAF Ingest output group. Sections about planning and creating this output group have been updated. Reference information, such as supported video codecs, has been updated. The sections for the following features, which are supported by this output group have been updated: Nielsen ID3 (converting watermarks to ID3), Nielsen watermarks (insertng watermarks). | June 14, 2024 | | [Profile, bit depth, chroma sampling](create-video-scratch.md) | The guide now includes information about the values in the Profile field that you fill in when you create a video output encode. | May 23, 2024 | | [Encoding schemes for video](video-characteristics-encoding-schemes.md) | The guide now includes information about the supported video encoding schemes (bit depth, chroma sampling, and so on). | May 23, 2024 | | [Workflow monitor](monitor-with-workflow-monitor.md) | Analyze AWS media services and create signal maps, visualizations of the media workflow, between those services. Use the signal maps to generate monitoring alarms and notifications using CloudWatch, EventBridge, and CloudFormation. | April 11, 2024 | | [MediaLive alerts](monitor-activity-types-alerts-channels.md) | We have added more alerts to the list of MediaLive alerts. Previously, some alerts were omitted in error. | January 9, 2024 | | [Color space using 3D LUTs files](color-space-process-with-lut.md) | The guide now includes a section on the recently added feature to convert color space using 3D LUTs files for color mapping. | December 13, 2023 | | [Color space](color-space-simplified.md) | The guide includes a second section about handling color space. It covers converting and passing through color space when you are working with source video that has dependable color space metadata and that doesn't include an unsupported color space. | December 13, 2023 | | [Per-outputs image overlays](x-actions-in-schedule-image-overlay.md) | The MediaLive schedule now supports the ability to insert static image overlays in specific outputs. Previously, MediaLive supported only global insertion — insertion in every output in every output group. | October 25, 2023 | | [IAM access for thumbnails](thumbnails-enable.md#thumbnails-enable-iam) | The guide has been updated to describe the IAM access you need to set up when enabling the thumbnails feature. | October 25, 2023 | | [IAM access for trusted entity for AWS Elemental Link devices](device-iam-for-medialive.md) | The section about setting up MediaLive as a trusted entity for a Link device has been revised to clarify that only one operation in Secrets Manager is required. | September 19, 2023 | | [Permissions for an AWS Elemental Link device](requirements-for-link.md) | The guide has been updated to include information about permissions that the user needs to work with a Link device. | September 11, 2023 | | [AWS Elemental Link device as the source for a MediaConnect flow.](setup-devices.md) | The guide has been updated to include information about how to set up a Link device as the source for a MediaConnect flow. This new functionality is in addition to the existing ability to set up the device as the source for a MediaLive input. | September 11, 2023 | | [Detaching an input](detach-input.md) | The guide now includes information about how to detach an input from a channel. | September 7, 2023 | | [Passing through KLV metadata](klv-metadata.md) | AWS Elemental MediaLive now supports the ability to extract KLV metadata from an input and to pass it through in TS outputs. | August 24, 2023 | | [Device transfer to another Region](device-transfer-region.md) | The user guide has been updated to describe the existing feature to transfer a device to another AWS Region. | August 14, 2023 | | [Link Availability Zone control](device-edit.md) | Link devices have added a new feature that lets you associate each device with a specific AWS Availability Zone. | August 1, 2023 | | [SCTE 104 in SMPTE 2038](smpte-2038.md) | The section about SMPTE 2038 now includes previously missing information about extracting SCTE 104 messages. MediaLive has supported SCTE 104 messages since support for SMPTE 2038 was first introduced. | July 31, 2023 | | [Thumbnails](thumbnails.md) | The guide now includes information about the new thumbnails feature that lets you view a preview of the current input for the channel. | July 7, 2023 | | [Channel and multiplex metrics with a 1 second period](monitoring-eml-metrics.md) | The CloudWatch metrics for AWS Elemental MediaLive channels and multiplex now support a period as low as 1 second. This enhancement gives you the ability to monitor activity in your channels in real time. | June 26, 2023 | | [Infrastructure security](infrastructure-security.md) | The information in this section has been revised. Specifically, we now require TLS 1.2 and we recommend TLS 1.3. | June 24, 2023 | | [Epoch locking and SCTE 35](pipeline-locking-verify-input.md#pipeline-locking-requirements-scte35) | The guide has been updated to describe a constraint with setting up a channel with epoch locking when an HLS or MediaPackage output group includes SCTE 35 messages. This constraint applies only to epoch locking. It doesn't apply to regular pipeline locking. | June 24, 2023 | | [Data protection](data-retention.md) | The information in this section has been revised. Specifically, we now require TLS 1.2 and we recommend TLS 1.3. | June 24, 2023 | | [Corrections to delivery to AWS Elemental MediaPackage](hls-destinations-emp.md) | The information for using HLS output groups to deliver to MediaPackage using the standard MediaPackage API and using the MediaPackage v2 API have both been revised to correct errors, particularly in the examples for the MediaPackage channel URLs. | May 31, 2023 | | [AWS Elemental Link reorganization](feature-elink.md) | The information about AWS Elemental MediaLive has been reorganized into three main sections, one in Features, one in the setup topics in the navigation bar, and one in the operations topics in the navigation bar. | May 31, 2023 | | [Timecode configuration](timecode.md) | The section about timecode has been renamed to timecodes and timestamps. The section has also been revised to clarify how timecode works in MediaLive. | May 22, 2023 | | [Pipeline locking](pipeline-lock.md) | This section has been revised to clarify some points. Pipeline locking now works with a channel that has multiple inputs (a channel that implements input switching). Inputs must have an embedded timecode. The timecode configuration field in General Configuration for the channel has no effect on pipeline locking. | May 22, 2023 | | [Correction to pipeline locking](pipeline-locking-set-up.md) | This section has been revised to remove incorrect information. Pipeline locking requires an embedded timecode in the input. But you don't need to set the timecode configuration source to embedded. MediaLive always looks for the embedded timecode. | May 22, 2023 | | [Delivery to AWS Elemental MediaPackage v2](hls-destinations-emp.md) | The guide includes information about setting up an HLS output group to deliver to a AWS Elemental MediaPackage channel that uses MediaPackage v2. | May 17, 2023 | | [Input failover with a AWS Elemental MediaConnect input](aif-setup-emx.md) | The guide now includes information about setting up input failover to work well with a MediaConnect input that is from a flow that implements source redundancy. | May 12, 2023 | | [Connection fields for downstream system for HLS output groups](hls-other-features.md#hls-reconnection-fields) | There is now information about the fields that control reconnecting to the downstream system for an HLS output group. | May 5, 2023 | | [Channel maintenance](maintenance.md) | The information about managing channel maintenance has been expanded. | May 4, 2023 | | [Link UHD Dolby input support](inputs-supported-codecs-by-input-type.md) | The list of supported audio codecs for Link UHD inputs has been updated to include Dolby Digital and Dolby Digital Plus. | April 18, 2023 | | [Tagging for AWS Elemental Link devices](tagging.md) | AWS Elemental Link devices now support AWS resource tagging. | March 27, 2023 | | [MediaLive alerts](monitor-activity-types-alerts-channels.md) | The guide now includes a list of the alerts that MediaLive might generate when a channel is running | March 10, 2023 | | [Correction to automatic input failover](aif-standard-pipeline-how.md#aif-standard-failure-handling) | We have corrected the description of how MediaLive handles a pipeline failure (scenario 1) in a standard channel. The text and the diagram have been revised. | March 3, 2023 | | [Nielsen watermarks](feature-nielsen-watermark.md) | The section about Nielsen watermarks has been updated to include the new field for specifying a local time zone. | February 20, 2023 | | [Setting up MediaLive as a trusted entity](setting-up-trusted-entity.md) | The section about setting up MediaLive as a trusted entity has been rewritten. The information has been reorganized. But there are no changes to the underlying rules for setting up a trusted entity. | February 14, 2023 | | [Setting up IAM permissions](setting-up-for-production.md) | There is an update to the section about identifying permissions that you must assign to users and other AWS identities. The information has been reorganized. But there are no changes to the guidance, or to the list of services and actions. | February 14, 2023 | | [AWS Identity and Access Management](security-iam.md) | Updated guide to align with the IAM best practices. For more information, see [Security best practices in IAM](https://docs.aws.amazon.com//IAM/latest/UserGuide/best-practices.html). | February 14, 2023 | | [Handling of SCTE 35 messages based on description](enable-ad-avail-blanking.md) | The chapter includes information that describes how MediaLive handles SCTE 35 messages depending on the ad avail mode and the segmentation descriptor in the message. This information has been corrected to clarify that in splice insert mode, messages with no segmentation descriptor are not treated as ad avails. | February 1, 2023 | | [New metrics](eml-metrics-output-metrics.md) | The guide now includes information about the Dropped Frames metric and the SVQ Time metric. | January 26, 2023 | | [Timecode burnin](timecode.md) | The user guide now includes information about burning the timecode into output video. | January 20, 2023 | | [Input loss handling](feature-input-loss.md) | The guide now includes information about the existing input loss behavior feature. You can customize the way that MediaLive handles media when the video input into the channel is lost. | January 13, 2023 | **Note** The AWS Media Services are not designed or intended for use with applications or in situations requiring fail‐safe performance, such as life safety operations, navigation or communication systems, air traffic control, or life support machines in which the unavailability, interruption or failure of the services could lead to death, personal injury, property damage or environmental damage. A component of MediaLive is licensed under the AVC patent portfolio license for the personal and non-commercial use of a consumer to (i) encode video in compliance with the AVC standard ("AVC video") and/or (ii) decode AVC video that was encoded by a consumer engaged in a personal and non-commercial activity and/or was obtained from a video provider licensed to provide AVC video. No license is granted or shall be implied for any other use. A component of MediaLive is licensed under the mpeg-4 patent portfolio license for the personal and non-commercial use of a consumer for (i) encoding video in compliance with the mpeg-4 visual standard (“mpeg-4 video”) and/or (ii) decoding mpeg-4 video that was encoded by a consumer engaged in a personal and non-commercial activity and/or was obtained from a video provider licensed to provide AVC video. No license is granted or shall be implied for any other use. Additional information may be obtained from MPEG-LA, LLC. See [http://www.mpegla.com](http://www.mpegla.com). MediaLive may contain Dolby Digital and Dolby Digital Plus, which are protected under international and U.S. copyright laws as unpublished works. Dolby Digital and Dolby Digital Plus are confidential and proprietary to Dolby Laboratories. Their reproduction or disclosure, in whole or in part, or the production of derivative works therefrom without the express permission of Dolby Laboratories is prohibited. © Copyright 2003-2015 Dolby Laboratories. All rights reserved.