Media agent for Video JS v4.2.0

Highlights

• Explicit opt-in for AWS MediaTailor, with full support for custom CDN domains.
• New config.ad.type API to choose between CSAI and SSAI (DAI, MT) ad tracking — no more URL-based guessing for SSAI.
• End-to-end logging through nrvideo.Log, with active detection mode logged at startup.

Features

MediaTailor custom CDN support

Replaced URL-based auto-detection with explicit opt-in.

• Enabled the tracker via mediatailor: true (or mediatailor: { trackingUrl, adSegmentPrefix }), supporting both default AWS hostnames and custom CDN domains.
• Added MT_DEFAULT_AD_SEGMENT_PATH (/tm/) constant for AWS-recommended CDN ad-segment path; ad segments rewritten to a custom CDN domain under /tm/ are detected automatically.
• Updated isMediaTailorSegment() to check the default AWS segments hostname, the /tm/ path, and an optional customer-supplied adSegmentPrefix.
• Threaded adSegmentPrefix through HLS (VHS) and DASH manifest parsing.
• Added explicit session initialization via mediatailor: { trackingUrl } for POST /v1/session/ flows.

Ad tracking configuration

Introduced config.ad.type to control ad tracker selection.

• Exposed AD_TRACKING constant with CSAI (flat value covering IMA / Brightcove IMA / Freewheel / generic) and SSAI sub-types (DAI, MT).
• Required an explicit sub-type for SSAI — each platform needs its own SDK and cannot be auto-detected.
• Mapped SSAI.MT to imply mediatailor: true.
• Added a fallback to CSAI auto-detection with a warning when config.ad.type is unset (backward compatible for v4.1.2 users).
• Co-located segmentPrefix and trackingUrl under config.ad.
• Added DaiAdsTracker to static exports.

Logging improvements

• Exposed VideojsTracker.Log as a static so UMD callers can set log level.
• Added logging of the active ad segment detection mode at tracker startup.
• Added logging of the matched ad segment detection path on the first ad break (once per session).
• Added logging of which CSAI framework was auto-detected (BrightcoveIma / IMA / Freewheel / generic).
• Replaced console.log/warn/error with nrvideo.Log across MediaTailor files.

Bug fixes

• Fixed buffer end handling in tracker.
• Fixed register-plugin.js silently dropping the options object and not forwarding it to the TrackerJS constructor.

Documentation

• Updated the README and SSAI docs for custom CDN support, clarified when trackingUrl and adSegmentPrefix overrides are needed, and cleaned up sessionId references.
• Corrected adSegmentPrefix references to config.ad.segmentPrefix in the SSAI troubleshooting docs.

Upgrade from 4.1.x

• No breaking changes for CSAI users. If config.ad.type is unset, the tracker still auto-detects CSAI frameworks (with a one-time warning).
• MediaTailor users must opt in explicitly. Replace any URL-pattern reliance with one of:
  • mediatailor: true (default AWS hostnames + /tm/ path)
  • mediatailor: { trackingUrl, adSegmentPrefix } (custom CDN / explicit session init)
  • config.ad.type: AD_TRACKING.SSAI.MT
• If you previously passed adSegmentPrefix at the top level, move it to config.ad.segmentPrefix.