For many years, Venera Technologies has been a leading provider of Automated Quality Control (AQC) solutions for professional media workflows.
Read More
High-quality subtitle delivery requires far more than accurate transcription. Captions/Subtitles must comply with strict technical, linguistic, and platform-specific standards—covering reading speed, line length, avoiding burnt-in text overlap, timing accuracy, punctuation, speaker and regional guidelines.
Traditionally, these checks are performed manually, making caption and subtitle QC slow, inconsistent, and difficult to scale across large content volumes and multiple vendors.
CapMate, our cloud-native caption/subtitle quality control software, addresses this challenge by utilizing AI- powered automation.
CapMate evaluates subtitle files against many technical rules, automatically detecting issues such as timing and sync mismatches, burnt-in text overlaps, reading speed violations, incorrect segmentation, formatting errors, and platform non-compliance—significantly reducing manual QC effort and rework.
Built on this strong QC foundation, CapMate also supports AI-based subtitle creation, with QC intelligence applied during generation to help prevent common compliance issues from appearing in the first place.
Whether subtitles are created manually, generated using AI, or sourced from external vendors, CapMate ensures consistent, broadcast-ready quality—making automated QC, the backbone of every subtitling and captioning workflow.
Overview
High-quality subtitle delivery requires far more than accurate transcription. Captions/Subtitles must comply with strict technical, linguistic, and platform-specific standards—covering reading speed, line length, avoiding burnt-in text overlap, timing accuracy, punctuation, speaker and regional guidelines.
Traditionally, these checks are performed manually, making caption and subtitle QC slow, inconsistent, and difficult to scale across large content volumes and multiple vendors.
CapMate, our cloud-native caption/subtitle quality control software addresses this challenge by utilizing AI- powered automation.
CapMate evaluates subtitle files against many technical rules, automatically detecting issues such as timing and sync mismatches, burnt-in text overlaps, reading speed violations, incorrect segmentation, formatting errors, and platform non-compliance—significantly reducing manual QC effort and rework.
Built on this strong QC foundation, CapMate also supports AI-based subtitle creation, with QC intelligence applied during generation to help prevent common compliance issues from appearing in the first place.
Whether subtitles are created manually, generated using AI, or sourced from external vendors, CapMate ensures consistent, broadcast-ready quality—making automated QC, the backbone of every subtitling and captioning workflow.
CapMate delivers industry-leading automated subtitle QC, identifying, correcting, and preventing errors that commonly cause delivery rejections, rework, and inconsistent viewer experience.
CapMate’s comprehensive QC engine ensures subtitles comply with industry formats such as SCC, IMSC, TTML, STL, and SRT. It detects and corrects structural issues including invalid timecodes, unsupported characters, and formatting errors, while validating platform-specific requirements for Netflix, Prime Video, Disney+, ViacomCBS, and more.
CapMate automatically detects and corrects subtitle–audio synchronization issues, supporting both homogeneous and industry-first heterogeneous sync across languages. Built-in review and editing tools, along with precise manual adjustment controls, provide complete flexibility for fine-tuning subtitle timing.
CapMate automatically identifies missing subtitle segments and enables quick insertion and correction. It also detects foreign-language dialogue, suggests translations into the subtitle language, and supports creation of accurate forced narrative subtitles for compliant content delivery.
CapMate automatically detects overlaps between subtitles and burnt-in on-screen text, enabling corrective adjustments for clear readability. Subtitles can be repositioned automatically to avoid visual conflicts. CapMate also supports extraction of subtitles from videos containing burnt-in captions.
CapMate detects profanity and abusive language in subtitles, enabling configurable replacements. It also performs English spelling, grammar, and punctuation validation, allowing reviewers to easily accept or reject suggestions before exporting clean, delivery-ready subtitle files.
CapMate generates quality scores for both original and auto-corrected subtitles, along with confidence scores for subtitle–audio sync corrections. These insights help teams quickly prioritize content requiring manual review, improving efficiency across large subtitle volumes.
CapMate provides a powerful browser-based review and editing environment with synchronized audio and video preview. Users can edit subtitle text, timing, and styling, while visual timelines display waveforms, speech events, silence segments, missing subtitles, foreign- language sections, and audio cues.
CapMate enables seamless project sharing for collaborative subtitle review and editing. Teams can work together in real time, share faults with suppliers, and provide clients controlled access for review and approvals—streamlining communication and accelerating delivery cycles.
CapMate’s comprehensive QC engine ensures subtitles comply with industry formats such as SCC, IMSC, TTML, STL, and SRT. It detects and corrects structural issues including invalid timecodes, unsupported characters, and formatting errors, while validating platform-specific requirements for Netflix, Prime Video, Disney+, ViacomCBS, and more.
CapMate automatically detects and corrects subtitle–audio synchronization issues, supporting both homogeneous and industry-first heterogeneous sync across languages. Built-in review and editing tools, along with precise manual adjustment controls, provide complete flexibility for fine-tuning subtitle timing.
CapMate automatically identifies missing subtitle segments and enables quick insertion and correction. It also detects foreign-language dialogue, suggests translations into the subtitle language, and supports creation of accurate forced narrative subtitles for compliant content delivery.
CapMate automatically detects overlaps between subtitles and burnt-in on-screen text, enabling corrective adjustments for clear readability. Subtitles can be repositioned automatically to avoid visual conflicts. CapMate also supports extraction of subtitles from videos containing burnt-in captions.
CapMate detects profanity and abusive language in subtitles, enabling configurable replacements. It also performs English spelling, grammar, and punctuation validation, allowing reviewers to easily accept or reject suggestions before exporting clean, delivery-ready subtitle files.
CapMate generates quality scores for both original and auto-corrected subtitles, along with confidence scores for subtitle–audio sync corrections. These insights help teams quickly prioritize content requiring manual review, improving efficiency across large subtitle volumes.
CapMate provides a powerful browser-based review and editing environment with synchronized audio and video preview. Users can edit subtitle text, timing, and styling, while visual timelines display waveforms, speech events, silence segments, missing subtitles, foreign- language sections, and audio cues.
CapMate enables seamless project sharing for collaborative subtitle review and editing. Teams can work together in real time, share faults with suppliers, and provide clients controlled access for review and approvals—streamlining communication and accelerating delivery cycles.
In addition to automated QC, CapMate offers integrated subtitle creation tools that accelerate turnaround while maintaining quality, consistency, and delivery compliance.
CapMate enables AI-based subtitle generation tightly integrated with its automated QC intelligence. Subtitles are created with built-in validation for timing, segmentation, reading speed, and formatting—helping prevent common compliance issues and reducing downstream QC effort and rework.
CapMate displays key audio events directly on the timeline, enabling users to easily verify and refine generated subtitles. These visual cues support accurate timing, improved segmentation, and informed editing—enhancing subtitle clarity, usability, and delivery readiness.
CapMate enables creation of multilingual subtitles using an integrated AI-based translation engine. Verified primary subtitles can be translated into additional languages, with intelligent alignment to original timing and segmentation—ensuring consistency, readability, and faster global content delivery.
CapMate enables AI-based subtitle generation tightly integrated with its automated QC intelligence. Subtitles are created with built-in validation for timing, segmentation, reading speed, and formatting—helping prevent common compliance issues and reducing downstream QC effort and rework.
CapMate displays key audio events directly on the timeline, enabling users to easily verify and refine generated subtitles. These visual cues support accurate timing, improved segmentation, and informed editing—enhancing subtitle clarity, usability, and delivery readiness.
CapMate enables creation of multilingual subtitles using an integrated AI-based translation engine. Verified primary subtitles can be translated into additional languages, with intelligent alignment to original timing and segmentation—ensuring consistency, readability, and faster global content delivery.
CapMate unifies automated quality control, correction, and subtitle creation into a single, streamlined workflow—allowing teams to move seamlessly from ingestion to delivery with full visibility, automation, and control.
CapMate is built to integrate seamlessly into existing localization and media supply-chain workflows. Users can access the platform through an intuitive web interface or integrate directly using REST APIs. CapMate is also pre-integrated with leading workflow and media asset management solutions.
As a native cloud solution, CapMate automatically scales QC processing nodes based on incoming workload. This removes content queuing and ensures predictable turnaround times, even when processing large content volumes.
CapMate follows a robust security framework aligned with Venera’s SOC 2–certified operational policies. Secure access mechanisms such as cross-account roles and strict permission controls help protect customer media assets and ensure enterprise-grade data security.
Delivered as a fully managed SaaS platform, CapMate’s infrastructure, availability, and SLAs are handled entirely by Venera—eliminating the need for customers to deploy, maintain, or scale systems internally.
Input Formats
SRT, SCC, IMSC, TTML, DFXP, SMPTE-TT, EBU-STL, WebVTT, iTT, PAC
Export Formats
All supported input formats
Export available in the same format as input
Cross-format export supported for selected format combinations
AI-based subtitle generation directly from media
Integrated QC validation during subtitle creation
Support for generation-ready formats with immediate review and correction
Optional AI-based translation for creating multilingual subtitles from verified primary subtitles
Text Analysis: Number of lines, Line length, Caption positioning, Profanity detection, Spelling and punctuation checks, Missing translations
Timing Analysis: CPS, CPL, WPM, Minimum and maximum duration, Frame gap analysis
Text–Video Analysis: Detection of subtitle overlap with burnt-in on-screen text
Text–Audio Analysis: Subtitle–audio synchronization, Missing subtitles, Forced Narrative subtitles
Language Support: 50+ supported languages
Format-level validation for:
SRT, IMSC, TTML, DFXP, SCC, SMPTE-TT, EBU-STL, WebVTT, iTT
Platform-oriented structural and timing compliance checks
Automatic detection of video segments containing burnt-in text
Frame-level identification and navigation of overlap regions
Extraction of burnt-in subtitles as text
Editing Capabilities
Subtitle text editing
Subtitle timing adjustments (sync, CPS, duration, caption gaps)
Caption positioning and alignment
Text find and replace
Automatic subtitle–audio sync correction
Case conversion (uppercase to mixed case)
Review Capabilities
Proxy generation for review workflows
Project sharing for review
Navigation and spotting of frames with burnt-in text and foreign language segments
Filter-based error navigation for focused correction and review
Venera serves some of the finest companies of the world in helping improve their content QC operations. Here’s a snapshot of the brands who trust us.
Subtitles focus on spoken dialogue (same or translated language) and assume the viewer can hear audio.
Captions include dialogue plus audio cues (speaker, sounds, music) and are designed for deaf or hard-of-hearing viewers.
CapMate detects sync errors, burnt-in text overlaps, missing subtitles and forced narratives, reading speed and line length violations, punctuation errors, conformance violations, etc.
Yes, CapMate automatically pinpoints the exact location and type of issues, allowing users to jump directly to problem areas instead of manually reviewing entire files.
Yes, CapMate® can automatically correct a range of issues, it supports auto-correction for errors related to sync, duration (Min and Max), burnt-in overlaps, caption positioning, punctuation etc.
Yes, CapMate detects and corrects random-sync offset, segment-wise sync offset, and drift sync errors.
Yes, CapMate supports heterogeneous sync correction where subtitle language differs from spoken audio, ideal for dubbed and multilingual content.
Yes, CapMate detects overlaps across the entire frame and auto-corrects overlaps by changing position of subtitles.
Yes, CapMate detects burnt-in subtitles and reports start time, end time, duration, and language, with export available as a CSV file.
Yes, CapMate performs punctuation QC and provides auto-suggestions for supported punctuations.
Yes, it detects cases where subtitle text closely matches burnt-in subtitles in the video and flags redundant subtitles to prevent double-subtitling.
Yes, CapMate detects missing subtitle segments and forced narrative audio events.
Yes. CapMate provides a built-in Editor/Review tool that allows users to review and edit subtitle timing, text, and on-screen position using an interactive timeline for precise and efficient corrections.
Yes. CapMate generates subtitles from MP3, WAV, MOV, or MP4 files, automatically synced with audio and delivered as QC-validated, auto-corrected files.
Generated subtitles automatically undergo QC for readability, speed, line length, burnt-in overlaps, and conformance before delivery.
CQS is a weighted score based on QC violations that reflects the overall quality of original and auto-corrected subtitle files.
CapMate supports SCC, TTML, SRT, DFXP, SMPTE-TT, IMSC, EBU-STL, WebVTT, iTT, and PAC formats.
Supported formats include MP4 (H.264/AAC), audio-only MP4, WAV, MP3, and MOV.
No. CapMate is a cloud-based SaaS platform accessible via a web browser or REST APIs.
Yes. CapMate is available for trial so users can evaluate its subtitle and caption QC capabilities before subscribing.
Our experts and thought leaders share their knowledge of technologies pertaining to QC solutions for digital media industry in these scholarly articles.
What is Cadence and why its validation is important?
Feb 14, 2024
Understanding video cadence (or pull-down) in the broadcast industry can be challenging. In this blog article, we will explain what Cadence (or Pull-down) is along with its practical application, and different pull-down patterns.
Frame Shifting or Blanking Shift Issue Unveiled
Dec 13, 2023
What is frame shifting, it's impact on video quality, and how to overcome the challenge effectively with automated QC tools?
Understanding Dolby Atmos and its QC challenges
Aug 10, 2023
Dolby Atmos is a revolutionary leap in surround sound technology that takes the audio experience to a whole new level. Learn more about it.
Caption-Audio Synchronization issues due to editing: Automated QC and alignment
Nov 1, 2023
By leveraging automated QC tools, content creators can ensure precise caption-audio synchronization, and save time and resources while delivering high-quality, synchronized captions for their videos.
Importance of QC in Audio Phase issues
Aug 29, 2023
Audio phase plays a pivotal role in sound reproduction. Understand the causes of audio phase issues and their QC solution.
What is Cadence and why its validation is important?
Feb 14, 2024
Understanding video cadence (or pull-down) in the broadcast industry can be challenging. In this blog article, we will explain what Cadence (or Pull-down) is along with its practical application, and different pull-down patterns.
Frame shifting or Blanking shift issue unveiled
Dec 13, 2023
What is frame shifting, it's impact on video quality, and how to overcome the challenge effectively with automated QC tools?
Caption-Audio Synchronization issues due to editing: Automated QC & alignment
Nov 1, 2023
Learn why caption-audio synchronization is important and how to deliver high-quality synchronized captions in your video using automated QC tools
Importance of QC of Audio Phase Issues
Aug 29, 2023
Audio phase is a complex and intricate phenomenon that plays a pivotal role in sound reproduction. Understand the causes of audio phase issues and its solution
Understanding Dolby Atmos and its QC challenges
Aug 10, 2023
Learn about the revolutionary technology of Dolby Atmos that takes your sound experience to a new level.
CapMate 101 – Caption/Subtitle Files Verification and Correction Solution
Aug 4, 2022
Many of our customers had been telling us that the process of validating and correcting closed caption files is tedious, time consuming and costly! And that they needed an innovative QC solution...
Understanding GOP – What is “Group Of Pictures” and Why is it Important
May 4, 2022
GOP or “Group of Pictures” is a term that refers to the video structure representing how digital video is grouped. But before we get into understanding GOP, let’s start with the basics...
Dialog-gated Audio loudness and why it is important
Apr 13, 2022
Learn what is dialog gated loudness, it’s importance in video content, and how our QC products can help you detect it in an automated manner...
It would be our pleasure to connect with you and understand your needs better. Please fill this form and we will contact you within one business day.