How do I convert my MK3D files to subtitles with automated transcription? 
Sonix uses the best speech-to-text algorithms to convert your video files (*.mk3d) to subtitles. Just follow these six easy steps:
Step 1
Sign up for a free Sonix trial account—includes 30 minutes of free MK3D to subtitles conversion.
Step 2
Upload the Matroska 3D Video File file(s) (*.MK3D) from your computer, Dropbox, Google Drive, or by dragging it on the page.
Step 3
Choose the language spoken in the uploaded MK3D file. We support over 50 different languages including English, Spanish, German, and French. Then click the 'Start Transcribing Now' button.
Step 4
Sonix will then automatically transcribe the audio from your MK3D file and convert it to a simple text format. Grab some tea, it will take only a few minutes.
Step 5
Use the Sonix AudioText Editor to polish your transcript before we convert it to a subtitle. It's like a word processor: simply type in your browser to correct any words.
Step 6
Click the 'Export' button. Choose either 'Subrip subtitle file (.srt)' or 'WebVTT file (.vtt)' from the dropdown to download the subtitle version of your MK3D file. You can also adjust the character length and time duration length of each subtitle.
That's it! Your MK3D file has now been converted to subtitles and is ready for the next step in your workflow!
Thousands of incredible customers create subtitles from their MK3D files with Sonix 
Frequently Asked Questions for Matroska 3D Video File (*.MK3D) to subtitle 
What is a MK3D file?
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.
Does Sonix transcribe video files with a *.MK3D file extension?
Yes, Sonix does automatically transcribe video files with a .MK3D file extension. Sonix is an online video to text converter. Convert any audio (mp3, m4a, wav, ...) or video (mk3d, mp4, mov, avi, ...) file to text without installing any software! Sonix quickly and accurately transcribes *.MK3D files and converts them to text in a subtitle format.
Know anyone who needs to convert Matroska 3D Video File (.MK3D) to subtitle?
We'd appreciate it if you tell them about Sonix—the best way to convert MK3D to subtitle.
Other ways to convert your MK3D video files with Sonix
MK3D to text
Use the most accurate speech-to-text technology to convert files: MK3D to text.
MK3D to docx
Accurately transcribe your MK3D file to Microsoft Word Format (docx) so you can bring the transcript into your workflow.
MK3D to PDF
Easily transcribe your MK3D file to Adobe's Portable Document Format (pdf) so you can share them with colleagues.
MK3D to srt
Quickly create subtitles from your MK3D files and save them as SRTs, one of the most widely supported subtitle formats.
MK3D to VTT
Create more advanced captions for your MK3D files by using the latest caption format VTT (Video Text Tracks).
MK3D to captions
Quickly and easily create closed captions for your MK3D files so you can embed them in your video files.
Add subtitles to MK3D files
Quickly and easily add subtitles to your MP4 video files with the power of automated transcription.
Convert Matroska 3D Video File to subtitles (SRT & VTT) with Sonix 
Sonix automatically transcribes and translates your audio/video files in 50+ languages. Easily search, edit, and share your media files. Sonix is an online, fully-automated speech to text service that quickly converts Matroska 3D Video File files to subtitles. Fast, accurate, and affordable. Millions of users from all over the world.
Includes 30 minutes of free transcription
