ProSub is Postudio's AI-powered captioning and subtitling platform that reads a full transcript in context, not line by line, to keep names, terms, and tone consistent across languages. Captions are timed to the cut so none straddle a shot change, and every language is translated, conformed, and exported to spec in one pass. Built for OTT platforms, broadcasters, and studios delivering subtitles and SDH at scale.
ProSub is Postudio's AI-powered captioning and subtitling product for streaming platforms, broadcasters, and studios delivering multilingual subtitles and SDH. It reads the transcript as a whole rather than line by line, so character names, terms, and tone stay consistent, and it times every caption to the edit so none straddle a shot change. Do-not-translate term lists keep names and brand terms intact across languages, and output is held to spec (for example 14.2 chars/sec, 2 lines max, 40 chars/line), with exports to SRT, WebVTT, TTML, iTT, SCC, or burn-in.
Highlights
Reads the full transcript in context rather than line by line, keeping names, terms, and tone consistent across every language
Times every caption to the edit so none straddle a shot change, and holds output to spec (chars/sec, line count, line length) automatically.
AWS Marketplace now accepts line of credit payments through the PNC Vendor Finance program. This program is available to select AWS customers in the US, excluding NV, NC, ND, TN, & VT.
Pricing is based on the duration and terms of your contract with the vendor, and additional usage. You pay upfront or in installments according to your contract terms with the vendor. This entitles you to a specified quantity of use for the contract duration. Usage-based pricing is in effect for overages or additional usage not covered in the contract. These charges are applied on top of the contract price. If you choose not to renew or replace your contract before the contract end date, access to your entitlements will expire.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
ProSub bills on two usage dimensions that work together. One meters by the number of minutes of content you process. The other meters by language, since each language track you deliver adds to the count. You pay for what you run, so a job that produces more minutes or more language tracks costs more. The two dimensions combine on your invoice based on the actual volume you process. This module is priced on its own usage, so you can run it without buying other products.
Top-of-mind questions for buyers
What counts as one minute for billing — source runtime or each language track produced?
The minutes dimension meters the runtime of the content ProSub processes. Each caption track covers the same cue count as the source. So minutes reflect the length of the content, while the separate language dimension counts how many language tracks you deliver from one run.
How do the minutes and language dimensions combine to drive my bill?
Both dimensions bill together on one invoice. Minutes reflect how long the content runs. Language reflects how many tracks you deliver from a single conform run. Longer content raises the minutes charge. Adding delivery languages raises the language charge. Together they scale with the volume you actually process.
Can I run ProSub on its own, or do I need the other modules?
You can run ProSub by itself. Each module is priced on its own usage and nothing is bundled. ProSub works on media already uploaded to the central hub, so you can caption and subtitle without buying dubbing, music, or editing products.
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Vendor refund policy
Fees for delivered captioning services are non-refundable. If a deliverable is materially defective due to a Postudio error, contact support within 7 business days for review; verified issues will be corrected or credited at Postudio's discretion. Unused committed-use balances are non-refundable but may be applied to future usage during the active term. Disputes follow AWS Marketplace's standard billing terms."
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Vendor support
Postudio provides dedicated support for all ProView customers. Buyers can expect timely assistance with onboarding, setup, and ongoing product queries through our help centre and direct support channels.
For technical issues, our team is available via email and responds within one business day. Enterprise customers receive priority support with faster response SLAs coordinated through their account manager.
For self-service resources, our help centre contains setup guides, feature documentation, and troubleshooting articles.
For any kind of support - e: arjun@postud.io or m: (+91) 8169791264
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AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
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