Features

Closed Caption Converter supports over 30+ file formats. Filter modules help automate repetitive tasks such as timecode rippling and frame rate conversion.

Learn more about our powerful filters and built-in plugins.

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Screenshot of Closed Caption Converter web UI running on a Macbook Pro.

Feature Overview


Timecode Rippling & Offsets

The Timing & Sync filter module supports a number of different timecode manipulation options including:

  • Frame Rate Conversion
  • Timecode Offset
  • Automatic Offset (reset to 00:00:00:00)
  • Stretch & Sync
  • Fix Timecode Overlaps
  • Automatic Frame Rate Detection

Segmentation & Conform

The Segmentation filter module can be used to segment parts from one or more source files and generate a single target caption file. This is used heavily in NLD workflows, and post-production workflows to match edits made to video.

  • Multi-source support
  • Insert space / gaps between segments
  • Multi-framerate support
  • SMPTE and MS Timecodes supported
  • Custom segment formats supported

Frame Gap Insertion and Overlap Detection

The Event Gap filter module can be used to insert blank frames between subtitle Events automatically for delivery to platforms such as Netflix. The Overlap protection module can correct for overlapping subtitle Events and automatically adjust based on reading speed controls.

  • Insert blank frames
  • Provide a minimum and maximum tolerances
  • Shot change aware
  • Fix Event Overlaps
  • Readjust timings to match reading speed requirements

QC & Review

The Automatic QC module has two types of test plans that can be run. The first test plan is a technical test plan that checks the file and file metadata. The second test plan is a content test plan that can be configured to check for a number of different content issues such as the maximum number of characters per line, or maximum number of lines per Event. 

  • Content and Technical QC
  • Custom style guides that can be configured per job or profile
  • Reading Speed and timing checks
  • Format specific checks (including metadata)
  • Single language alignment checks supported

Connectors & Plugins

The Closed Caption Converter API includes access to a number of additional connectors and platform plugins including:

  • Delivery to third party cloud storage (S3, Backblaze, Azure, and Google Cloud)
  • Project registration in Closed Caption Creator for manual editing and review workflows
  • Delivery to Backlight's Iconik media asset management platform.
  • Transcription support for Deepgram, Speechmatics, Assembly AI, and more.
  • Subtitle file translation using DeepL, ModernMT, and more.

Learn more about Closed Caption Converter

Convert, edit, and deliver closed captioning and subtitle files in over 30 different formats with Closed Caption Converter.

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