MP4 is what phones, screen recorders, webinar platforms and export dialogs all reach for, which makes it the file most subtitle jobs start from. Drop one and download subtitles timed from word-level timestamps. Past 500 MB the upload page takes over, to 10 hours or 5 GB. Nothing to pay for the first transcript, at any length · instant preview, no account needed · 1,000 minutes for $8, credits that keep.
How it works
No editing software involved, and no line of timing typed by hand.
Anything up to 500 MB uploads right here. A longer recording carries on at the upload page, which goes to 10 hours or 5 GB.
The spoken track comes back with a timestamp on every word, roughly a few minutes of waiting per hour of runtime. The preview needs no account.
SRT for platforms and editing software, VTT for anything playing in a browser. TXT, DOCX, JSON and Markdown ride along free.
MP4 specifics
The picture is nearly all of an MP4’s weight. A talking-head recording at 1080p tends to sit between one and two gigabytes an hour, so the 5 GB ceiling arrives somewhere around the three-to-five hour mark — well before the 10-hour one. Shoot the same length at 4K and you can pass 5 GB inside half an hour.
Subtitles are built from sound, and the sound is a rounding error next to the frames. Run the recording through the free extract audio from video tool and upload the audio that comes out. It keeps the original timeline exactly, so every cue still lands on the right frame when you put the SRT back against the video.
Split it into parts of ten hours or less and caption each; the cues in part two start again from zero. Elsewhere: MOV to SRT for a QuickTime export, video to SRT for any container, audio to SRT when there is no picture, YouTube to SRT for a link, the caption generator as the front door, and the MP4 format page for the container.
Where the file goes
YouTube Studio and most hosts have a subtitles setting that takes an SRT or VTT upload.
Import the SRT into Premiere Pro or DaVinci Resolve and the caption track arrives already timed, ready to restyle or burn in.
Learning platforms and browser players usually want VTT, so a recorded session gains captions without anyone re-recording it.
Word-level timing shows where a line sits, so pulling a clip from a long recording is reading rather than scrubbing.
Pricing
a pack from $4 opens the full transcript. Then packs: 1,000 minutes at $8, 2,000 at $12, 5,000 at $24, roughly $0.29 to $0.48 an hour.
| Recording | $8 pack | $12 pack | $24 pack |
|---|---|---|---|
| 20-minute screen recording | $0.16 | $0.12 | $0.10 |
| 1-hour webinar | $0.48 | $0.36 | $0.29 |
| 2.5-hour lecture | $1.20 | $0.90 | $0.72 |
| 5-hour event recording | $2.40 | $1.80 | $1.44 |
Each figure is the slice of a pack one recording uses. Without credits, files are capped at 3 hours. See pricing.
FAQ
Drop the MP4 into the box on this page, or use the upload page if it is over 500 MB. Preview with no signup, open the full transcript with a free account, then download the SRT.
Yes, by uploading its sound instead of the whole recording. The free extract audio from video tool produces a much smaller file on the same timeline, and the cues it yields still match the picture frame for frame.
No. The transcript on screen groups the words by speaker, but SRT, VTT, TXT and DOCX downloads hold only text and timings. If you need speaker information in a file, export JSON.
Yes. Pulling the sound out of an MP4 does not move it, so a cue at eleven minutes still points at eleven minutes when the file goes back against the picture.
A 2.5-hour lecture uses $1.20 of the $8 pack, $0.90 at the $12 pack rate, or $0.72 at the $24 pack rate. Packs are bought once and the credits never expire.
Instant preview, no signup. A free account opens the first transcript, any length, in full.
For uploads and links alike: see a video transcription service for uploads and links, online transcription services and how our transcription services work.