How it works
Complete the job in three clear steps
- Choose a media file from this device.
- Run the local MediaInfo inspection and review the detected streams.
- Copy or download the JSON report before closing the page.
Private Lucaden media inspector
Embedded Subtitle Track Inspector
Find embedded text and subtitle streams and review their format, language, title, default, forced, and timing metadata.
Free to use MediaInfo WebAssembly reads the selected file in local chunks. The file and extracted metadata are not uploaded to Lucaden.
Loading tool workspace…
Important
Check the result before relying on it
Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.
Practical details
What this Lucaden tool does
The inspector lists subtitle-like Text tracks reported by MediaInfo. It detects stream metadata but does not claim to extract bitmap or encrypted caption payloads.
The same local analyzer powers each focused route, while the workspace highlights the fields relevant to that task.
Included capabilities
- Embedded Text track discovery
- Format and codec ID
- Language and title tags
- Default and forced flags
Useful for
- Audit multilingual video
- Check default captions
- Review an MKV export
- Plan subtitle conversion
Questions
About this tool
Can this extract the subtitle file?
No. It inventories detected tracks. Extraction depends on the container and subtitle codec and needs a separate demux workflow.
Why does a visible caption not appear?
The caption may be burned into video pixels, stored in an unsupported stream, or delivered separately rather than embedded.
Open-source foundations
Built transparently
Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.