State-of-the-Art AI Models
Powered by next-generation AI designed for seamless speech understanding worldwide
Upload MP4 files and automatically create polished VTT subtitle files in minutes.
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Supports 20+ file formats including MP3, MP4, WAV
MP4 is the standard video format: phone videos, screen recordings, and Zoom and Teams meeting recordings are usually MP4 files. Upload a .mp4 file and Scriptivox turns the speech in it into timed WebVTT captions, the subtitle format HTML5 video players and most course platforms use.
MP4 files come from phone cameras, screen recorders, Zoom's local recordings and video editors. On a phone, pick the video straight from your gallery or Files in the upload box.
Leave it on auto-detect or pick one of more than 100 languages. Turn on speaker recognition when more than one person talks.
Read every line in the editor, fix any word, then download the .vtt file, ready for YouTube, your video editor or your player.
| Specification | Value |
|---|---|
| Container | MPEG-4 Part 14 |
| Developed by | MPEG |
| Introduced | 2003 |
| Video codecs | H.264, H.265, AV1 |
| Audio codecs | AAC, MP3, ALAC |
| Max resolution | 8K UHD |
| Typical bitrate (1080p) | 5–20 Mbps |
| Multiple audio tracks | Yes |
| Subtitle tracks | Embedded (soft) subtitles |
| Chapter markers | Yes |
| Streaming optimized | Yes |
| Licensing | Patent-licensed |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | web delivery, social media uploads, sharing with anyone |
Advanced AI technology meets simple, intuitive design
Powered by next-generation AI designed for seamless speech understanding worldwide
Transcripts delivered in real time and large files processed in minutes, not hours.
Your data is protected with end-to-end encryption, privacy-first safeguards, and enterprise-grade security controls.
Supports uploads of up to 10 hours, designed for uninterrupted transcription of lengthy sessions.
Global coverage with accent recognition and dialect adaptation, ensuring inclusivity worldwide.
No. Upload the MP4 and Scriptivox transcribes its sound track directly. Converting it first only adds a step.
Yes. Transcribe the MP4, then download the transcript as an SRT or VTT file timed to the video, and add it in your video editor or on YouTube.
You can start free, with no card, and transcribe short files every day. Pro adds unlimited transcriptions and files up to 10 hours or 5 GB each.
Yes. The editor shows every line with its timing. Correct names and terms, then download the finished file.
WebVTT is the caption format for HTML5 video. Vimeo, Wistia, JW Player, Video.js and most learning platforms accept .vtt files, and YouTube does too.
More than 100, from English, Spanish and Hindi to Arabic, Japanese and Swahili. Leave the language on auto-detect, or choose it for the best result on short files.
Files are transcribed many times faster than they play, so most are ready in a few minutes. Long recordings take a little longer, and you can close the page while they run.
Join thousands of users who trust Scriptivox for their transcription needs