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Auto-Captioning & Automation - Content Management

Auto-Captioning & Automation​

REACH Auto-Ordering Rules​

REACH can auto-order captioning tasks based on triggers:

  • Entry READY status: Auto-caption every new entry
  • Category entry addition: Auto-caption entries added to specific categories
  • Flavor asset readiness: Auto-caption when a specific quality version is ready
  • Caption asset READY: Cascade to translation (caption completes → trigger translation task)

Configure rules in the REACH profile. See REACH API for rule configuration.

Opt-Out​

Set the blockAutoTranscript flag on entries to prevent auto-captioning:

curl -X POST "$KALTURA_SERVICE_URL/service/media/action/update" \
  -d "ks=$KALTURA_KS" \
  -d "format=1" \
  -d "entryId=$KALTURA_ENTRY_ID" \
  -d "mediaEntry[objectType]=KalturaMediaEntry" \
  -d "mediaEntry[blockAutoTranscript]=1"

Caption Moderation​

When a KS includes the enableCaptionModeration privilege, newly added captions have displayOnPlayer=false. Captions must be explicitly approved before the player displays them. Use this for compliance workflows that require human review before publication.

Accuracy-Based Deduplication​

When multiple captions exist for the same entry + language, the system automatically sets displayOnPlayer=true on the caption with the highest accuracy value. This handles the machine-to-human caption upgrade path: when REACH delivers a human caption (99%+ accuracy) for an entry that already has a machine caption (~85% accuracy), the human caption automatically wins display priority.

Caption Copy on Trim/Clip/Replace​

  • Clip/Trim: Captions are auto-copied to the new entry with time offsets adjusted to match the clip boundaries.
  • Entry replacement: Old captions are deleted and new captions are copied from the replacement entry.