How big is a 3-hour MP4? bitrate times three hours, and usually under 5 GB.
A 3-hour MP4 is roughly 1.35 GB at 1 Mbps, 3.4 GB at 2.5 Mbps and 6.75 GB at 5 Mbps, because size is simply bitrate multiplied by running time. WhipScribe takes one file up to 10 hours or 5 GB, transcribes three hours in about 6 minutes, gives the first 20 minutes free, and the whole 180 minutes fits the $6 pack of 500 minutes.
Reading the file size
Why one 3-hour MP4 is 1 GB and another is 7.
Size is bitrate times length
Every second of an MP4 carries a set number of bits. At 1 Mbps an hour comes to about 450 MB, at 2.5 Mbps about 1.1 GB, and at 5 Mbps about 2.25 GB. Multiply by three for your file and you have its size before you open the folder. Your editor or player usually shows the bitrate under file information, or you can divide the size you see by the length.
Where your file probably sits
Screen shares and meeting recordings tend to sit at the low end because most of the picture stays still. Camera footage in 1080p with movement sits at the high end, and a 4K camera file for three hours can pass 10 GB.
Over 5 GB? Keep only the sound
The transcript only needs the speech. Three hours of audio at 128 kbps is about 173 MB, so exporting the soundtrack as an MP3 or M4A shrinks a 9 GB video to something that uploads in a minute.
Big files use the main upload page
The upload box on this page handles files up to 500 MB. Anything larger, up to 5 GB, goes through the upload page, and a file over 2 GB starts once a pack is on your account.
Same three hours, two routes
Shrinking the file versus sending it as it is.
✗ Cutting it to fit a small limit
Tools built around small uploads push you to trim, compress or chop the video before anything happens.
- Re-encode the video to lower quality first
- Cut it into thirds to get under a size cap
- Three uploads, three transcripts, three files to merge
- Timestamps restart at zero in each part
- Chapters stop at every cut
- An evening lost before the first word comes back
✓ Sending the MP4 whole
The original file goes in as it is, as long as it stays within 10 hours and 5 GB.
- One upload of the original MP4
- Roughly six minutes of processing for the three hours
- Timestamps run from 00:00:00 to the last line
- Chapters follow the whole recording
- A brief stating the main argument and takeaways
- 180 minutes taken from the $6 pack
Sample output
Three hours in, the timestamps still line up.
Illustrative only, not a real recording: these lines show how a 3-hour MP4 keeps one running clock from start to finish.
Export
One transcript. Five clean formats.
Every pack exports all five — no format is held back for a higher tier.
Plain text
De-ummed paragraphs. Ready to paste.
SRT captions
Timed to the speech. Every video editor reads this.
WebVTT
HTML5 player + YouTube uploads.
Show notes
Formatted with chapters and pull-quotes.
Machine-readable
Timestamped text for your own tools.
Pricing
Honest pricing, no surprises.
A pack from $6 (500 minutes) opens the full transcript. After that, no subscription and no auto-renew — every tier is a one-time minute pack, and credits never expire. Buy once, use the minutes whenever you need them.
Casual pack
$6/500 min
8 hours of audio — $0.72 an hour. One-time — credits never expire.
- 500 minutes of audio
- All export formats
- Unlimited AI chat per transcript
- Executive summary & key quote
Best value
$12/2,000 min
33 hours of audio — $0.36 an hour. Credits never expire.
- 2,000 minutes of audio
- Priority queue
- All export formats
- Unlimited AI chat per transcript
Bulk pack
$24/5,000 min
83 hours of audio — $0.29 an hour. Credits never expire.
- 5,000 minutes of audio
- Priority queue
- API access for batch pipelines
- All export formats
FAQ
Questions about 3-hour MP4 files.
How big is a 3-hour MP4 file?
It depends on the bitrate it was saved at. At 1 Mbps it is about 1.35 GB, at 2.5 Mbps about 3.4 GB, and at 5 Mbps about 6.75 GB. Your file manager shows the exact figure, and a variable-bitrate recording with long still stretches can come in below these estimates.
Can I upload a 3-hour MP4 that is over 5 GB?
Not as it is, since 5 GB is the ceiling for one file. Export the audio track or re-save the video at a lower bitrate, and three hours of speech fits easily. A file between 2 and 5 GB starts once a pack is on your account.
How long does a 3-hour MP4 take, and what does it cost?
About 6 minutes of processing once the upload finishes, at roughly 2 minutes per audio hour. Three hours uses 180 of the 500 minutes in the $6 pack, and the first 20 minutes are free on your first recording.
Should I split a big MP4 into parts?
There is no need while it is under 10 hours and 5 GB. Splitting gives you separate transcripts whose timestamps restart at zero, while one file keeps a single clock and one set of chapters.
Which languages are supported?
Speech in 99 languages is detected automatically, including Tagalog, Korean, Japanese, Portuguese, Spanish and Swedish. Music and background noise in the video are skipped, and the speech is transcribed.
What exports do I get, and who sees the video?
TXT, DOCX, SRT, VTT and JSON, with SRT and VTT ready to add as captions on the same MP4. Recordings are transcribed on our own servers and are never used for training, and you can delete the file from your account.
Related
More on long video files.
Whatever size your 3-hour MP4 turned out to be, if it is under 5 GB, it goes in whole.
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