Convert JSON Subtitles to DFXP Format
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About JSON
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. While not a traditional subtitle format itself, it is an excellent way to store and transmit structured subtitle data. Each subtitle cue can be an object with properties for start time, end time, text content, and any custom metadata.
About DFXP
DFXP (Distribution Format Exchange Profile) is a profile of the more general TTML standard. It was created to standardize subtitle delivery for streaming services and is famously used by platforms like Netflix. It is an XML-based format that contains rich information about timing, styling, and positioning, ensuring high-quality, professional, and accessible captions for digital distribution.
JSON vs DFXP
| Feature | JSON | DFXP |
|---|---|---|
| Styling Support | true | true |
| Positioning Support | true | true |
| Animation Support | true | true |
| Learning Curve | intermediate | expert |
| Quality Rating | 4 | 5 |
| Patent Status | open standard | industry standard |
| Year Introduced | 2001 | 2008 |
Frequently Asked Questions
Can a media player play a JSON subtitle file?
No, standard media players like VLC or QuickTime cannot directly play a JSON file as a subtitle track. JSON is a data format that would need to be processed by a custom web application or script to display the subtitles over a video.
Why would I convert subtitles to JSON?
Converting subtitles to JSON is extremely useful for web developers and data processing. It allows you to easily load subtitle data into a web application, manipulate it with JavaScript, integrate it with other APIs, or store it in a database in a structured way.
Is DFXP the same as TTML?
DFXP is a specific implementation, or 'profile', of TTML. Think of TTML as a large toolbox with many options, and DFXP as a specific set of those tools chosen for a particular job (web streaming). While a DFXP file is a TTML file, not all TTML files are valid DFXP files.
Do I need to worry about DFXP as a casual user?
No, DFXP is a professional delivery format. As a user, you will almost never encounter DFXP files directly. They are processed and delivered by the back-end systems of streaming platforms. If you are creating subtitles, you will typically work with SRT or VTT.
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