Sonix transcribes your OPUS file and exports it as SRT subtitles that you can use with any video platform or editor.
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 and timestamps your OPUS audio.
Fine-tune subtitle timing and text with our editor.
Download your OPUS subtitles as an SRT file.
Yes! Sonix transcribes your OPUS file with precise timestamps and exports it as SRT subtitles ready for any video platform.
SRT (SubRip Subtitle) is the most widely supported subtitle format. It works with YouTube, Vimeo, Facebook, and all major video editors.
Sonix generates word-level timestamps accurate to the hundredth of a second, ensuring your subtitles sync perfectly with the audio.
Yes! Our editor lets you adjust subtitle timing, merge or split captions, and customize character limits per line.
Absolutely! Upload your SRT file to YouTube Studio and your subtitles will sync automatically with your video.
Yes! Customize your SRT with options for max characters per line, lines per caption, and maximum duration.
Word-level timing ensures your subtitles sync perfectly with the audio.
SRT works with YouTube, Vimeo, Facebook, and all major video platforms.
Adjust timing, line length, and caption duration to your needs.
Import directly into Final Cut Pro, Premiere, DaVinci Resolve, and more.
I'd give Sonix a 10 mainly due to the accuracy.
Fantastic product and service. Fast, great quality transcript, great online editing facility. Whole experience was easy and problem free.
Impressed at how seamless Sonix makes editing transcripts. This is so much easier and more enjoyable than manually writing an entire transcript myself.
I tried 4 other services, and Sonix is the easiest to use, most accurate, and more reasonably priced for the quality.
The transcription service was awesome. I can’t thank Sonix enough.
Great website. Love the drag & drop option. Very accurate too!
It's SO fast! I couldn't believe it. It's saved me hours of time.
Sonix transcription service has dramatically reduced the time I need to spend on clients' interviews. Tremendous help!
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AI transcription and translation in 53+ languages.
