About MKV files
MKV (Matroska) is a flexible open container used by OBS, many screen-capture tools and media archives. It can hold almost any codec.
Common sources: OBS Studio recordings, game capture tools, personal media archives, open-source editors.
Chrome and Edge read most MKV files with common codecs (H.264 or VP9 video, AAC or Opus audio). Safari doesn't support MKV — use Chrome, or remux the file to MP4 first.
MKV to text
OBS can record several audio tracks into one MKV, but only one is used — for a clean transcript, record your microphone and desktop audio mixed into track 1 and disable the others.
A streamer turns a 95-minute OBS MKV recording into a transcript to pull highlights and write a summary.
Cost: 95 credits (9.5¢).
Translating a MKV
Remuxing an MKV to MP4 in OBS takes seconds and avoids browser codec issues.
A game streamer translates a 22-minute MKV tutorial into Portuguese for Brazilian viewers.
Cost: 1,100 credits ($1.10) with a translated voice, or 22 credits (2.2¢) for translated text only. Switch Full translation output on in the tool above for a voice track.
Using the tool on this page
- The spoken language is detected automatically; you select the output language — the spoken language itself for an untranslated transcript, or another language for a translation. Files can be up to 2 hours long.
- Only the audio is sent for processing — the video stays on your device — and audio and text are deleted within 30 minutes of delivery (how files are protected).
- You can download a timestamped transcript, subtitles (SRT and VTT) and plain text. Every output, step and limit is explained on the video to text page.
Frequently asked questions
Why won't my MKV open?
Your browser has to be able to read the file's codecs. Chrome or Edge handle most MKVs; Safari doesn't support MKV. If it still fails, remux to MP4 in OBS (File → Remux Recordings) — no quality is lost.
Is the translated MKV saved as MKV?
The translated video is saved as MP4. Your original picture is kept; only the voice track changes.