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Resolve video annotation playback issues in Chrome and Edge in Adobe Experience Manager 6.5

Last update: August 18, 2026

This article explains how to resolve an issue where video annotation in Adobe Experience Manager (AEM) 6.5 fails in Chrome and Edge browsers due to the prioritization of legacy Theora (.ogg) video renditions.

Description description

In AEM 6.5, when using the Annotate feature for video assets, a problem occurs where, in Chrome and Edge browsers, only the audio plays while the video frame remains frozen on the poster image. This issue doesn’t occur in Firefox, and video playback works as expected in the standard asset detail or preview view in all browsers. The problem is specific to the annotation workflow and Chromium-based browsers.

Environments

  • Adobe Experience Manager 6.5 (on-premise)
  • AEM Author instance
  • Applicable to all environments where legacy video renditions are generated

Symptoms

  • In the Annotate view, video playback in Chrome and Edge results in audio only, with a frozen video frame.
  • In Firefox, annotation works as expected.
  • In the standard asset detail/preview screen, video plays correctly in all browsers.

Cause

The annotation player prioritizes the legacy Theora (..ogg) rendition as the first video source. Chrome and Edge browsers no longer support Ogg/Theora video decoding, so only the audio plays and the video frame remains frozen. Firefox continues to support this format, so playback works there.

Resolution resolution

Follow the steps below to resolve the issue:

  1. Update the FFmpeg Transcoding workflow to stop generating legacy OGG (Theora) and FLV video renditions:

    • In AEM, open the workflow model used for video asset processing (typically DAM Update Asset).

    • Locate the FFmpeg Transcoding step.

    • Adjust the configuration to remove OGG (Theora) and FLV output profiles, keeping only MP4 renditions.

    • Save and activate the updated workflow.

  2. For new video assets, upload, or reprocess them to ensure only MP4 renditions are generated.

  3. To remove obsolete OGG and FLV renditions from existing assets:

    • Use a custom AEM workflow or maintenance script to identify and delete legacy OGG and FLV renditions from assets in the DAM. (There’s no out-of-the-box tool for this; custom development is required.)

  4. Test the solution:

    • Open a video asset in the Annotate view in Chrome or Edge.

    • Confirm that both video and audio playback function correctly.

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