Convert TXT Subtitles to PGS Format
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About TXT
A plain text (.txt) file is the simplest possible format, containing only raw text characters without any timing or styling information. When used in the context of subtitles, it typically represents a transcript of the audio. To be used as subtitles, this transcript would need to be processed by another tool to add the necessary timestamps to sync the text with the video.
About PGS
PGS (Presentation Graphic Stream) is an image-based subtitle format used exclusively for Blu-ray discs. Unlike text-based formats like SRT, PGS subtitles are stored as a sequence of bitmap images that are overlaid on the video. This means they can have any font, style, or color imaginable, but it also means they are not text-searchable and cannot be easily edited.
TXT vs PGS
| Feature | TXT | PGS |
|---|---|---|
| Styling Support | false | true |
| Positioning Support | false | true |
| Animation Support | false | false |
| Learning Curve | beginner | expert |
| Quality Rating | 1 | 5 |
| Patent Status | open standard | proprietary |
| Year Introduced | 1963 | 2006 |
Frequently Asked Questions
How can I turn a TXT transcript into an SRT file?
This process is called 'timing' or 'syncing'. It requires specialized software where you can load the video and the text file, and then go through the video, marking the start and end times for each line of dialogue. Many professional subtitle editors offer features to help with this process.
When is a plain TXT file useful?
A plain text file is very useful for creating a simple, readable transcript of a video for reference, for search engine optimization (SEO), or as the first step in a translation workflow before the text is timed.
Can I edit a PGS subtitle file?
No, you cannot edit the text in a PGS file directly because it's a series of images, not text. To 'edit' a PGS file, you would need to use Optical Character Recognition (OCR) software to convert the images back into a text-based format like SRT, edit the text, and then optionally convert it back, though this is a complex and often error-prone process.
Why do Blu-rays use image-based subtitles?
Image-based subtitles guarantee that the text will be displayed exactly as the designer intended, with specific fonts and styles, on any certified Blu-ray player. This avoids issues with players not having the correct fonts installed or not supporting certain text rendering features.
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