Sonix transcribes your OPUS file and creates timestamped subtitles in SRT, VTT, and other formats.
Modern audio codec optimized for voice and streaming
The OPUS file is an audio file format that was created for use in Voice over IP (VoIP), video conferencing, or in-game chat. Since the OPUS codec is primarily used in Internet streaming applications, it isn't common. However, is it a lossy audio format that uses both SILK (used by Skype) and CELT (from Xiph.Org) codecs and supports variable bit rates from 6 kb/s to 510 kb/s.
State-of-the-art codec for voice; excellent at low bitrates
Sign up for Sonix's free trial. Includes 30 minutes free.
Upload your OPUS file from your computer or cloud storage.
Choose from 53+ languages spoken in your file.
Sonix AI transcribes your OPUS with word-level timestamps.
Customize line length, duration, and subtitle breaks.
Download subtitles as SRT, VTT, or other formats.
Yes! Sonix transcribes your OPUS file with word-level timestamps and creates professional subtitles in SRT, VTT, and other formats.
Export subtitles as SRT (most universal), VTT (web video), FCPXML (Final Cut Pro), and many more formats.
Yes! Adjust max characters per line, lines per caption, max duration, and manually fine-tune any timing.
Upload the SRT/VTT file to YouTube, Vimeo, or import into your video editor. You can also burn subtitles directly into the video.
Yes! Sonix can translate your subtitles into 54+ languages, making your content accessible globally.
Sonix achieves up to 99% accuracy. Use our editor to make any corrections before exporting.
Export subtitles as SRT, VTT, FCPXML, and more for any platform.
Control line length, duration, and style of your subtitles.
Create subtitles in 53+ languages from your original audio.
Permanently embed subtitles into your video with one click.
The UI is da bomb with so many great features including the one where I can highlight a passage and download as a clip. So very useful! It’s editing and transcription combined!!
The experience is fantastic, the system is easy to use, and transcription quality in different languages is unbeatable. Sonix is the best system I've tried so far...and I know one thing or two about languages/translation and voice recognition.
I loved how accurate you are even in Dutch!
The interface and editor experience were great. I also like the way you handle speaker identification and naming. Pretty slick. Nice timestamp frequency / formatting too.
The transcription was fast and accurate.
I really like it. Easy to use, very accurate, and easy to correct when it is not. A truly super program, and I would recommend it to anyone.
The best thing ever, nothing more to say.
I’m really dazzled by your system. I have never seen something so accurate. You push the level higher than Otter and available for French language!
Try Sonix free with 30 minutes of transcription. No credit card required.
AI transcription and translation in 53+ languages.
