Convert MK3D to captions

Sonix transcribes your MK3D file and creates closed captions that make your content accessible to everyone.

ADA compliant
5-min turnaround
Accessible
Audio
Video
DOCX
SRT/VTT
PDF
53+ Languages
About This Format

Understanding MK3D files

What is a MK3D file?

Matroska 3D video container format

The Matroksta 3D (MK3D) file format is used for storing 3D content (video and audio) while using the standard MKV container. However, it also uses a StereoMode field for 3D video files which have a variety of configurations such as side by side (left eye is first) or top-bottom (right eye is first). The Matroska file format is seeking to be the future of 3D audio and video file formats. It was derived from a project called MCF, but MK3D files differentiate themselves from it significantly because it is based on EBML (Extensible Binary Meta Language), a binary derivative of XML. EBML enables the Matroska Development Team to gain significant advantages in terms of future format extensibility, without breaking file support from old media parsers.

Common Uses

  • 3D video content
  • Stereoscopic video storage
  • Home theater 3D

Audio Quality

High-quality container supporting multiple audio tracks

Transcription Tips for MK3D

  • Audio transcribes normally regardless of 3D video
  • Same quality considerations as MKV files

Where MK3D Files Come From

  • 3D Blu-ray rips
  • 3D camera recordings
  • 3D content creation
10x
Faster than real-time
Get your MK3D captions in minutes
99%
Accuracy rate
Industry-leading AI for MK3D files
53+
Languages
Captions in any language
30+
Export formats
SRT, VTT, SCC, and more
How It Works

Create captions from MK3D in 6 steps

Step 1

Create account

Sign up for Sonix's free trial. Includes 30 minutes free.

Step 2

Upload file

Upload your MK3D file from your computer or cloud storage.

Step 3

Select language

Choose from 53+ languages spoken in your file.

Step 4

Auto-transcribe

Sonix AI transcribes your MK3D with word-level timestamps.

Step 5

Edit captions

Fine-tune timing and formatting for accessibility.

Step 6

Export

Download closed captions in SRT, VTT, or SCC format.

Common Questions

Everything about MK3D captions

Can you create closed captions from MK3D files?

Yes! Sonix transcribes your MK3D file with precise timestamps and creates closed captions in standard formats.

What's the difference between subtitles and closed captions?

Closed captions include non-speech elements like [music], [applause], and speaker identification. They're designed for deaf and hard-of-hearing viewers.

Are Sonix captions ADA compliant?

Yes! Sonix captions meet accessibility requirements when properly reviewed and edited. Our editor helps ensure timing and accuracy standards.

What caption formats are supported?

Export captions as SRT, VTT, SCC (for broadcast), and other formats. Each format has specific use cases.

Can I add sound descriptions?

Yes! Use our editor to add [music], [laughter], and other non-speech descriptions for full accessibility.

Do captions help with SEO?

Absolutely! Captions make your video content searchable and improve accessibility, both of which can boost SEO rankings.

Why Sonix

Accessible captions from MK3D files

Accessibility First

Create captions that make your content accessible to deaf and hard-of-hearing viewers.

ADA Compliant

Meet accessibility requirements with properly formatted closed captions.

Sound Descriptions

Add non-speech elements like [music] and [applause] for full context.

SEO Benefits

Captions make video content searchable and improve discoverability.

Related

More ways to convert MK3D files

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Other file formats

RM to text
AVI to text
WMV to text
MPE to text
MPG to text
MXF to text
FLV to text
MPEG to text
M2V to text
M4V to text
See all supported file formats
Reviews

Trusted by accessibility teams

4.98 rating from 211 reviews

Sonix saves me 60% of the time editing. No more manual trascription nightmare with writing down timecodes, and sending emails. I think you are changing the game here! Bravo :)
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Jan S.
Brno, Czechnia
The best service available for my language (Czech) - thank you very much for saving me a LOT of work!
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Tamara F.
Prague, Czech Republic
I was truly amazed by the quality of the transcript I received from you.
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Szeged, Hungary
Sonix is by far the best transcription tool I have ever used.
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Mic A.
Ikeja, Nigeria
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Douglas A.
Tillamook, OR, USA
Very high quality transcription - very accurate - only took a quick scan/sweep to manually correct/clean up the text.
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Wednesbury, UK
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Gainesville, FL USA
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SW
Sarah W.
Bryant, AL, USA
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